2006.11 Revision

No.ZY03"VALQUA" is a compounded word coming from VALUE and QUALITY
which is the symbol and motto of the company.
The above trade mark is registered in Japan, Australia, China, India, Indonesia,
Korea, Malaysia, Philippjnes, Singapore, Taiwan, Thailand and U.S.A.

NIPPON VALQUA INDUSTRIES, LTD.
1-1, Nishi-Shinjuku, 2-chome, Shinjuku-ku, Tokyo 163-0406, Japan
TEL : 81-3-5325-3421 FAX : 81-3-5325-3436
http://www.valqua.co.jp

NIPPON VALQUA INDUSTRIES, LTD.
PRINTED IN JAPAN CATALOGUE No. ZY03 0611 02 SEN

http://www.valqua.co.jp

INDEXGASKET

VALQUANON-ASBESTOSPRODUCTS

Because of their well-balanced characteristics,
asbestos fibers have long been used in various fields as
representative inorganic fibers.
In recent years, however, enhanced regulations from thelabor health view point are demanding quick
replacement with non-asbestos fibers.
In response to such requirements, NIPPON VALQUA
INDUSTRIES, LTD. (VALQUA), as an integrated seal
manufacturer, has been engaged in the development ofhighly reliable Non-AS™ Sealing Products that can beused in place of conventional asbestos products.

Table Indicating Types and Typical Characteristics of Non-Asbestos Gaskets ________________________ 1
Flowchart Indicating Selection of Non-Asbestos Alternatives for Asbestos Products _________________ 3
Non-Metallic Gasket
BLACK HYPER™ GF300 ___________________________________________________________________________ 5
Compressed Non-Asbestos Fiber Sheet 6502/6500/6500AC/6503/GE200_______________________________ 7
NONASUPER™ 8590TN ___________________________________________________________________________ 12
Gasket Paste _______________________________________________________________________________________ 13
VALFLON™ Gasket 7010/7010-EX/7020/7026/7GP61/7GP66 _________________________________________ 14
VALFLON™ Envelope Gasket N7030/N7031/N7035 __________________________________________________ 17
Cord Seal™ <Soft> 7GS66A/7GS62A/7GS64N _______________________________________________________ 20
Semi-Metallic Gasket
VALQUAFOIL™ Gasket VF-30/VF-35E/VFT-30/VFT-35E _______________________________________________ 21
Spiral Wound Gasket 8590 Series/8590L Series/6590 Series/7590 Series _______________________________ 24
Metal Jacketed Gasket N510 Series/N520 Series _____________________________________________________ 26
Metallic Gasket
Metallic Serrated and Flat Gaskets 540 Series/560 Series/6540H Series ________________________________ 28
Ring Joint Gasket 550 Series _______________________________________________________________________ 29
Metal Hollow O-ring 3640/3641 _____________________________________________________________________ 30
Trypack™ Metal C-ring Gasket with spring 3645/3645LS ______________________________________________ 31
Rubber Coated Fabric & Synthetic Rubber Gasket
VALQUATEX Gasket N214/N314 ____________________________________________________________________ 32
Rubber Sheet 2010(NBR/CR/EPDM)/4010/5010 ______________________________________________________ 32

GLAND PACKING

Now, we have the pleasure of presenting the line-up ofasbestos-alternative products that have recently beendeveloped.

Table Indicating Non-Asbestos Gland Packing _____________________________________________________ 33
Table for Selection of Non-Asbestos Gland Packing for Valve Stems _______________________________ 34
Fluid-wise Application Sheet for Non-Asbestos Gland Packing for Valve Stems _________________________ 35
Table for Selection of Non-Asbestos Gland Packing for Rotary Pump Shafts _______________________ 37
Table for Selection of Non-Asbestos Gland Packing for Equipment _________________________________ 38

Non-AS™: For all asbestos-free products.
VALQUATIGHT™: For the spiral-wound gaskets having a
selected asbestos tape for the winding material.
CLEANTIGHT™: For the spiral-wound gaskets having a
selected asbestos-free inorganic tape for the winding material.
BLACKTIGHT™: For the spiral-wound gaskets having a
selected flexible graphite tape for the winding material.
WHITETIGHT™: For the spiral-wound gaskets having a
selected PTFE tape for the winding material.
VALFLON™: For all fluorocarbon resin products.

Constructions and Features
Carbon fiber based _________________________________________________________________________________ 39
VALFLON™ based _________________________________________________________________________________ 40
Special fiber based _________________________________________________________________________________ 42
Metal based _______________________________________________________________________________________ 42
Flexible graphite based _____________________________________________________________________________ 43
Gland Packing for Nuclear Power Use ________________________________________________________________ 44
Manufacturing Ranges _____________________________________________________________________________ 45
Design Data _______________________________________________________________________________________ 45
Reference Materials _______________________________________________________________________________ 46
Instruction Manual ________________________________________________________________________________ 47

Cautions regarding the use of VALFLON™
(Fluoro carbon Resin Products)• These products are not specifically designed and manufactured
for use in medical apparatus to be implanted in human bodies
or to be in contact with humors or living organisms. So, whenplanning to use them for such applications, please contact us
for consultation.
• When they are to be heated up to 200°C or over, be sure toprovide sufficient air discharge and ventilation in order toprevent inhalation of dissolved gases.
• These products shall never be burnt, but shall be disposed of inaccordance with the Law for Disposal and Cleaning of Wastes.

VALQUATEX (Textile products)__________________________________________________ 48
Flameproof Carbon Fiber Textile 101C/105C/105CS____________________________ 49
Heat-Resistant Glass Fiber Textile 102G/105G/105GF/112G/112GA/112GC___________________________________ 50
Ceramic Fabric Textile 101S/102SF/102S/105S/105SN/112S/112SN

Related Products (Tools)
Gasket Cutter _____________________________________________________________________________________ 51
Packing Tool ______________________________________________________________________________________ 52

GAS K ET

Table Indicating Types and Typical Characteristics of
Non-Asbestos Gaskets

Type

Asbestos
product

Non-Asbestos
product(VALQUA No.)(VALQUA No.)

Temperature(°C)

Pressure (MPa)

Description

Nitrile Rubber Sheet Gasket−30〜1200.5

Chloroprene Rubber Sheet Gasket−30〜1200.52010Ethylene Propylene Rubber Sheet Gasket−40〜1500.5

4010

Fluoro Rubber Sheet Gasket−15〜200

0.5

5010

Silicone Rubber Sheet Gasket−60〜200

0.5

640

Synthetic Rubber O-ring

Depending onmaterial used

30.0

4640

Fluoro Rubber O-ring−15〜200

30.0

5640

Silicone Rubber O-ring−60〜200

30.0

Synthetic Rubber Sheet Gasket

2060

Horizontal U-shaped Synthetic Rubber Gasket

6.0

Rubber Gasket with cloth

16

Rubber Sheet Gasket with cloth

Depending onmaterial used
Depending onmaterial used

Graphite Compounded Non-Asbestos Sheet

GF300

BLACK HYPER™

−200〜300

3.5

Self-strained sealing type gasket provided with a reinforcing ring,
made by molding synthetic rubber to have a horizontal U-shaped cross section.
Rubber sheet gasket reinforced with fabric, made of NBR, CR and NR.
Means are required against infiltration leakage.
Unlike conventional Compressed Fiber sheet, these are based on new-concept,
composed of graphite and PTFE without using rubber binders.

6502

Compressed Non-Asbestos Fiber Sheet for high performance general use−50〜214（2）3.0Compressed Non-Asbestos Fiber Sheet for general use, with enhanced heat resistance.

6500

（2）
Compressed Non-Asbestos Fiber Sheet for general use −50〜183

3.0

Compressed Non-Asbestos Fiber Sheet for general use

6500-AC

Anti-corrosion type Compressed Non-Asbestos Fiber Sheet−50〜183（2）3.0Anti-corrosion Type Compressed Non-Asbestos Fiber Sheet

6503

（2）
White Compressed Non-Asbestos Fiber Sheet for high performance general use −50〜214

3.0White Compressed Non-Asbestos Fiber Sheet for general use

GE200

Graphite Compounded Compressed Non-Asbestos Fiber Sheet−50〜214（2）3.0Graphite Compounded moderate price Compressed Fiber sheet having rubber binders,with restricted field of applications.

8590TNNONASUPER™

−200〜450

JIS10K

7010

VALFLON™ Pure PTFE Gasket−50〜100

0.5

Fabricated PTFE gasket (in principle, for grooved flanges).

7010-EXNew VALFLON™ Pure PTFE Gasket−50〜1501.0

Fabricated New VALFLON™ gasket.

7020

VALQUALON™ Gasket−200〜200

4.0

7026

Black VALQUALON™ Gasket−200〜200

4.0

7GP66

VALFLON™ Soft Sheet Gasket−240〜260

2.0

Flexible and highly strong PTFE Sheet Gasket−100〜150

1.5

Fluorocarbon Resin Gasket using Compressed Non-asbestos Fiber sheet in the core.

−100〜200

2.0

Fluorocarbon Resin Gasket using Compressed Non-asbestos Fiber sheet and special felt in the core.

N7030（H）Series Non-Asbestos VALFLON™ Envelope Gasket (high temperature type) −100〜260

3.0

Fluorocarbon Resin Gasket for high temperature use, using VALQUAFOIL™ (expanded graphite)
sheet and special felt in the core.

Compressed
Fiber Sheet

1500
1500AC
1501
1501AC
930,etc.

Fluorocarbon Resin Gasket

N7030（N）Series Non-Asbestos VALFLON™ Envelope Gasket
Fluorocarbon Resin
Envelope Gasket

7030 Series™

N7030（S）Series Non-Asbestos VALFLON Envelope Gasket

1.0

Major application page

Gasket made by punching rubber sheet.

Pipe flanges,
equipment

32

Molded gasket having O-shaped cross section made of various rubber materials.
Available pressures may differ depending on groove designs.

Equipment−

Equipment−

Pipe flanges−

Non-Asbestos Gasket for alternative use of Compressed Fiber sheet.

Low creep type Fluorocarbon Resin Gasket reinforced with special filler material.

5

Pipe flanges,
equipment

7

8
Pipe flanges, equipment 12

Pipe flanges,
equipment

14

Pipe flanges,
equipment

17

Equipment

20

Pipe flanges,
equipment

21

Manholes, ducts

32

7GS66A

Cord Seal™ <Soft>−240〜260

5.0

String type sealing material made by modifying PTFE to have a marsh mallow shape.

VF-30

VALQUAFOIL™ Sheet Gasket−240〜400

2.0

Fabricated expanded graphite gasket.

VF-35EVALQUAFOIL™ Sheet Gasket with thin metallic sheet−240〜400

5.0

Fabricated expanded graphite gasket (foil inserted).

VFT-30VALQUAFOIL™ Sheet Gasket (PTFE-laminated)−240〜300

2.0

Fabricated expanded graphite gasket (PTFE laminated VF-30).

VFT-35E

VALQUAFOIL™ Sheet Gasket with thin metallic sheet (PTFE-laminated) −240〜300

5.0

Fabricated expanded graphite gasket (PTFE laminated VF-35E).

214

N214

VALQUATEX Gasket (rubber coated fabric)

400

0.1

Rubber coated glass fiber fabric processed into a specified flat shape.

314

N314

VALQUATEX Gasket (rubber coated ceramic fabric with metallic wire)

800

0.1

Rubber coated ceramic fiber fabric with metallic wire processed into a specified flat shape.

8590 Series

CLEANTIGHT™

−200〜500

30.0

Spiral wound gasket using non-asbestos inorganic paper as filler.

8590L Series

Lined CLEANTIGHT™

−200〜600

30.0

Gasket with expanded graphite tape wound into the intermediate section of Cleantight winding.

6590 Series

BLACKTIGHT™

−270〜450

30.0

Spiral wound gasket using expanded graphite tape as filler.

7590 Series

WHITETIGHT™

−260〜300

20.0

Spiral wound gasket using PTFE tape as filler.

510 Series

N510 Series

Non-Asbestos Corrugated Metal Jacketed Gasket

7.0

Corrugated metal jacketed gasket using non-asbestos heat resisting sheet in the core.

Pipe flanges, equipment

520 Series

N520 Series

Non-Asbestos Flat Metal Jacketed Gasket

7.0

Flat metal jacketed gasket using non-asbestos heat resisting sheet in the core.

Pipe flanges, equipment

Metal Flat Gasket

560 Series

Metal Flat Gasket

14.0

Fabricated metal gasket.

Pipe flanges, equipment

Serrated Gasket

540 Series

Serrated Gasket

14.0

Concentrical grooved metal gasket.

Pipe flanges, equipment

Ring Joint Gasket

550 Series

Ring Joint Gasket

45.0

Ring Joint Gasket/Used for ring joint seat flanges. Two cross sections available:
oval type and octagonal type.

Pipe flanges, equipment 29

3640

Metal Hollow O-ring (basic design)

7.0

Metal O-ring made by processing thin metallic tube into a specified shape.

3641

Metal Hollow O-ring (Balanced type)

Depending onmaterial used
Depending onmaterial used
Depending onmaterial used
Depending onmaterial used
Depending onmaterial used
Depending onmaterial used
Depending onmaterial used

300.0

For high pressure use, provided with a balancing hole.

3645

Trypack™

−270〜250

7.0

Metal C-ring with coil springs (coil springs coated with thin metallic sheet).

3645LS

Trypack™ (low tightening stress type)−270〜250

7.0

Possible to seal with lower tightening stress than 3645.

Fluorocarbon Resin String Type Gasket

Expanded Graphite
Sheet Gasket

Rubber Coated Fabric Gasket

Semi-Metallic Gasket

Available range(1)2010Synthetic Rubber O-ring

Metallic Gasket

Available range(1)2010

Rubber Sheet Gasket

Non-metallic Gasket

Product name

Spiral Wound Gasket

Metal Jacketed Gasket

Metal O-ring

590 Series

24
Pipe flanges,
equipment
25
26

28

30
Pipe flanges,
equipment
31

Note (1) Since Available Ranges define only the maximum permissible ranges of temperature and pressure under ideal conditions,
any special applications are not covered.
(2) For applications subject to temperatures 100°C or higher, refer to "Notes" on page 9.

12

Flowchart Indicating Selection of Non-Asbestos
Alternatives for Asbestos Products

GAS K ET

Non-Asbestos Alternatives for Compressed Asbestos Fiber Sheet/Asbestos Spiral Wound Gaskets

Flowchart for Alternatives for Compressed Asbestos Fiber Sheet

Flowchart for Alternatives for Asbestos Spiral Wound Gaskets

For further details including available ranges, refer to respective pages of this catalogue.

For further details including available ranges, refer to respective pages of this catalogue.

FeaturesFeatures
Compressed
Asbestos
Fiber Sheet

General Use Compressed
Non-Asbestos Fiber Sheet

General fluids (water, steam, oil, etc.)
Less than 100°C

No.6500

・Economically efficient・Good in handleability andworkability

Asbestos Spiral
Wound Gasket

Almost all fluids
Generally replaceable[No.8590 Series]○CLEANTIGHT™ [Max 500°C]
・Performance nearly equal to thatof asbestos
・Price nearly of the same level・ Best suited forGraphite based[No.6590 Series]○BLACKTIGHT™ [Max 450°C]
・Excellent in chemicals resistance,
cycles resistance and gas sealing
property

Non-asbestos
Inorganic
Paper based

100°C or over

General use

No.6502
High temperaturestability,
long term durability

Measures against
hardening
Solvents,
corrosive fluids

High temperaturestability

High Temperature Type
Compressed Non-Asbestos
Fiber Sheet・Economically efficient・Good in handleability andworkability

Chemicals resistance& cleanness

No.GF300

No.VF-35E

Graphite Sheet withThin Metallic Sheet・ Very small changes in physicalproperties under hightemperature condition
・ Low stress relaxation

High temperature &acid resistance

No.7010-EX

No.7020
No.7026○WHITETIGHT™ [Max 300°C]
・Excellent in chemicals resistanceand gas sealing property
・Excellent in cleanness andnon-contamination property○Lined CLEANTIGHT™
Lined Non-asbestos
with Inorganic Paper[No.8590L Series]

Metal &
Semi-Metallic[Max 600°C]
・Products with stripes (graphite
stripes)・Suitable for high temperature usewith inorganic paper for preventing
oxidation of graphite

Ring Joint,
Metal Hollow O-ring,
Metal Jacket, etc.

PTFE Sheet with filler material・High flow resistance・Good in chemicals resistance

Graphite Sheet withThin Metallic Sheet

No.VF-35E

No.8596 Series
No.6596 Series
No.7596 Series

Note: Since this flowchart provides only rough standards, please contact us for final selection.

3

PTFE based[No.7590 Series]

Pure PTFE Sheet (low flow type)・Excellent in chemicals resistance・High non-contamination property

Over 150°C

High temperaturestability

Untreatable fluids such as
HTS (molten salt)

High Temperature Type Graphite
Compounded Sheet
・Very small changes in physicalproperties under hightemperature condition
・Good in chemicals resistance

150°C or below

High strength

When prioritizing
safety and stability

・Very small changes in physicalproperties under hightemperature condition
・ Low stress relaxation

Spiral Wound Gasket
・High temperature and pressure,high stability

Note: Since this flowchart provides only rough standards, please contact us for final selection.

4

GAS K ET

BLACK HYPER™
VALQUA No.GF300

New Concept Non-Asbestos Sheet
VALQUA No.

GF300

ApplicablefluidsWater, seawater, hot water, steam, air,acids (excluding oxidizing acids such as
hot, concentrated sulfuric acid and nitricacid), weak alkalis, saline water solution,oils, alcohol, aliphatic solvent and its
vapor, as well as liquefied gases

InapplicablefluidsOxidizing acids and substances
susceptible to burn such as oxygen

Applications

Connections of pipe flanges and valve
bonnets, of cover flanges and nozzles in
towers & tanks, ovens, pressure vessels
and heat exchangers used in various
factories including power stations, oil
refineries, iron works, and shipyards

FeaturessFree from hardening deterioration and aging due to heatsNo hardening effect allows retightening.
sApplicable to wider variety of fluids compared to otherCompressed Fiber Sheet.

Being entirely free from rubber, no heat
deterioration occurs, thus, GF300 can beused for high temperature applications(heat resisting at 300°C).
The use of flexible resin binders results inimproved properties against brittlenessand flaw compared to expanded graphite
sheet gaskets.

■ Fluid-wise available ranges ■４
q Water based fluid
w Oil based fluide Acid, alkali and solvent
３

Pressure (MPa)

BLACK HYPER is the ultimate form of sheet gaskets.
Mainly composed of graphite, silica and using PTFE as binders, GF300 is an all-purpose sheet gasket series
that is excellent in chemicals resistance and finds various fields of applications subject to wide ranges oftemperatures.
Thus, BLACK HYPER is suitable for wide fields of applications as non-asbestos alternatives for Compressed
Asbestos Fiber Sheet.

r Air, nitrogen gas
t Low temperature fluid

２

Remarks
In case of gas seals, it is recommended
to apply gasket paste on the innerdiameter section before applying atightening stress of about 35 MPa.
When also applying gasket paste on thecontact surface, attention should be
paid as crush is liable to occur.

１０−２５０ −２００ −１５０ −１００ −５０

０

５０

１００

１５０ ２００〈Width × length〉（mm）
1270×1270(t 1.0, t 1.5)
1500×1500(t 2.0, t 3.0)
〈Thickness〉1.0, 1.5, 2.0. 3.0 mm〈Color tone〉Black (print color: black)

３５０■ Crush strength comparison ■No.GF300 without paste t 1.5
improved product
t 3.0
No.GF300 with paste
improved product

t 1.5

crush

t 3.0

crush
crush

No.GF300 without paste t 1.5

crush

t 3.0

Dimensions

２５０ ３００Temperature (℃)

No.GF300 with paste
for reference
No.1500 without paste
for reference
No.1500 with paste■ Design data ■

crush

t 1.5

crush

t 3.0
t 1.5

crush

t 1.5
０

５０

１００

１５０

２００

Crush Stress（MPa）▼ m, y values
As for the m, y values of Compressed Non-Asbestos Fiber Sheet,the values for asbestos joint sheets defined in the Appendix 3 to
JIS B 8265 can be applied.

Fluid

Recommended tightening stress(MPa)

Thickness (mm)Gasket factor"m"

Minimum design
seating stress "y" (N/mm2)

Liquid25.5

3.0（3.2）

2.00

10.98

Gas

35

1.5（1.6）

2.75

25.50

1.0（0.8）

3.50

44.82

▼Available ranges
Temperature and pressure classifications show individual service limit.
Maximum pressure varies depending on fluid classification andtemperature.
VALQUA No.

Temperature (°C)

Pressure (MPa)

GF300−200〜300

3.5■ Comparison of high temperature hardening properties ■Cylinder diameter (multiple to gasket thickness)▼ Recommended tightening stress
Tightening stress is defined as a pressure required
under standard condition without considering an
opening force due to internal fluid.

１４０

A heated sheet is wound on a cylinder with a specified diameter, to check occurrence of "crack".
１２０

Heating temperatures: 100℃, 200℃, 250℃
Heating time: 24 hours for each temperature

１００
８０
６０

No.GF300
No.6502

４０

No.GE200２０No.1500［for reference］

０Normaltemperature

１００℃

２００℃

２５０℃

Heating temperature/24 hours

5

6

GAS K ET

Compressed Non-Asbestos Fiber Sheet
VALQUA No.6502/6500/6500AC/6503/GE200

Compressed Non-Asbestos Fiber Sheets are sheet type gasket materials, where special rubber binder and a small
amount of filler material are mixed with organic and inorganic fibers, and rolled & vulcanized.
Compressed Non-Asbestos Fiber Sheet Applicable to Wider Fields of Applications
BLACK SUPERVALQUA No.

6502

White Compressed Non-Asbestos Fiber Sheet

Compressed Non-Asbestos Fiber Sheet with minimum
amount required of organic fiber, while special rubber
binder having superior heat resistance is compounded toartificial inorganic and carbon fibers also having excellent
heat resistance.

ApplicablefluidsAir, water, seawater, hot water, steam, general oils, weakacid, weak alkali, alcohol, as well as various gases

InapplicablefluidsApplications

Strong oxidizing acid, strong alkali, and various solvents

Dimensions〈Width × length〉（mm）1270×1270、1270×3810
2540×3810、3048×3810〈Thickness〉（mm）0.5, 0.8, 1.0, 1.5, 2.0, 3.0〈Color tone〉Grey (print color: black)

Since black components are removed in the Compressed
Fiber Sheet, these are suitable gaskets to be used for
applications where inclusion of black foreign substances
into the fluid should be avoided.

VALQUA No.

6503
ApplicablefluidsTap water, industrial water, hot water, steam, drain air, as
well as general gases

InapplicablefluidsApplications

Strong oxidizing acid, strong alkali, and various solvents

Dimensions〈Width × length〉（mm）1270×1270、1270×3810
2540×3810、3048×3810〈Thickness〉（mm）0.5, 0.8, 1.0, 1.5, 2.0, 3.0〈Color tone〉White (print color: green)

Junctions of steam lines, pipe flanges, valve bonnets andother equipment used in oil refineries and chemicalindustries

Applications where inclusion of black foreign substances
into the process fluid should be avoided such as inpetrochemical industry.

Graphite Based Compressed Non-Asbestos Fiber Sheet with superior handleability
General Use Compressed Non-Asbestos Fiber Sheet
These sheet gaskets are composed mainly of graphite andcontain reduced amount of rubber composition, wherein
the handleability which has been a drawback inconventional graphite sheets is improved.

VALQUA No.
VALQUA No.

6500

These are suitable to be used as Non-asbestos gaskets forpipe flanges and equipment in various industries. The
adaptability of these sheets as water apparatus according to
JIS S 3200-7 has been confirmed.

ApplicablefluidsWater, seawater, hot water, steam, air, acid, alkali, salts,
water solution, oils, alcohol, aliphatic solvent and its vapor,as well as various gases and liquefied gas

Strong oxidizing acid, strong alkali, and various solvents

InapplicablefluidsAromatic hydrocarbons, ketones, oxidizing acids, and fluid
susceptible to burn

Pipe flanges, valve bonnets and other equipment used invarious industries including oil refineries, chemical industries
and shipyards

Applications

Steam lines in oil refineries and chemical industry

Dimensions〈Width × length〉（mm）1270×1270〈Thickness〉（mm）0.5, 1.0, 1.5, 2.0〈Color tone〉Black (print color: orange)

ApplicablefluidsAir, water, seawater, hot water, petroleum based oil, neutral
salt solution, weak acid, weak alkali, as well as general gases

InapplicablefluidsApplications

Dimensions〈Width × length〉（mm）1270×1270、1270×3810
2540×3810、3048×3810〈Thickness〉（mm）0.4, 0.5, 0.8, 1.0, 1.5, 2.0, 3.0〈Color tone〉Blue (print color: black)Anti-corrosion Type Compressed Non-Asbestos Fiber Sheet

6500ACWith reduced amount of soluble chlorine, these Compressed
Fiber Sheets have corrosion restriction effect when stainlesssteel flanges are used for water or water
solution.

ApplicablefluidsTap water, industrial water, hot water, steam, drain air, as wellas general gases

InapplicablefluidsStrong oxidizing acid, strong alkali, and various solvents

Applications

Stainless steel pipe flanges, valve bonnets and otherequipment used in various industries requiring corrosion
resistance

VALQUA No.

Dimensions

7

GE200

〈Width × length〉（mm）1270×1270、1270×3810
2540×3810〈Thickness〉（mm）1.0, 1.5, 2.0, 3.0〈Color tone〉Blue (print color: orange)■ Design data ■▼ Recommended tightening stress▼m, y values

Tightening stress is defined as a pressure required
under standard condition without considering an
opening force due to internal fluid.

As for the m, y values of Compressed Non-Asbestos Fiber Sheet,the values for Compressed Asbestos Fiber Sheets defined in the
Appendix 3 to JIS B 8265 can be applied.

Fluid

Recommended tightening stress(MPa)

Thickness (mm)Gasket factor"m"

Minimum design
seating stress "y" (N/mm2)

Liquid25.5

3.0（3.2）

2.00

10.98

Gas

40

1.5（1.6）

2.75

25.50

1.0（0.8）

3.50

44.82

▼Available ranges
Temperature and pressure classifications show individual service limit.
※For service conditions exceeding 100°C, the notes on the following page shall be observed.
Pressure (MPa)

VALQUA No.

Temperature(°C)

Water based

Oil based

Gas

6500/6500AC−50〜183

3.0

3.0

1.0

6502/6503/GE200−50〜214

3.0

3.0

1.0

Note）
As for oil gas, solvent and corrosive fluid,
separate consultation is required.

8

GAS K ET

Compressed Non-Asbestos Fiber Sheet
VALQUA No.6502/6500/6500AC/6503/GE200▼ Stress strain characteristics

Dimension of test piece: JIS 10K 25A, t = 1.5 mm■ Comparison of physical properties ■

４０

Item

No.1500

No.GF300

No.6502No.6503

No.6500

No.GE200

1.5

3.0

1.5

3.0

1.5

3.0

1.5

3.0

1.5

2.0

1.5

3.0

Tensile strength（across grain）
10.3
（MPa）

10.5

13.1

12.5

19.2

18.1

17.0

15.3

10.5

9.9

28.4

27.3

No.6502
Compressed
Non-Asbestos Fiber Sheet

Compressibility（34.3MPa）
（%）

7

6

9

10

9

6

10

10

8

8

9

8

Recovery（34.3MPa） （%）

40

37

67

64

60

61

57

55

65

56

61

55

No.6500

Flexibility with grainin multiple to thickness

＜2

＜2

11

12

10

10

9

9

20

21

11

12

Compressed
Asbestos Fiber Sheet

Density（kg/m3）

2307

2214

1761

1759

1803

1857

1810

1813

1902

1921

1880

1924

３５

BLACK HYPER™

No.GF300

Thickness（mm）

３０

Graphite CompoundedCompressed Fiber Sheet

Physical Properties［for reference］

Stress（MPa）

No.GE200
BLACK SUPER™

２５

２０

No.6503
Compressed
Non-Asbestos Fiber Sheet

１５

１０

No.1500［for reference］
５

Oil resistance〈IRM903 OIL 150℃×5h〉

０
０.０

２.０

４.０

６.０

８.０

１０.０

１２.０

Strain（%）■ Fluid-wise temperature & pressure ranges ■Water based fluids (water, hot water, steam, etc.)
Oil based fluids (general oil etc.) Note 1

１

Pressure (MPa)No.6500
No.6500AC

Refer to notes

２

０
−５０

０

５０

１００

１８３

１５０

２１４
２００

Refer to notes

No.6502No.6503
No.GE200

３

Pressure (MPa)Gas based fluids (air, nitrogen, inert gas, etc.) Note 2No.6502No.6503
No.GE200１０−５０No.6500
No.6500AC
０

Temperature (℃)

５０Tensile strength loss
（across grain）（%）

Thickness increase
Weight increase

−8.9

7.6

9.2

9.6

13.0

0

16.7

−1.1

6.7

3.0

26.8

16.8

（%）

0.9

0.1

1.3

1.0

2.1

0.6

2.2

0.9

1.3

0.3

20.1

12.4

（%）

0.7

0.6

4.4

3.0

4.2

1.7

3.9

2.2

4.4

1.7

24.9

10.2

Fuel oil resistance〈JIS fuel oil B RT × 5h〉
Thickness increase

（%）

1.1

0.3

4.3

2.6

5.4

2.3

5.6

2.8

3.3

2.5

14.5

10.6

Weight increase

（%）

1.8

1.2

6.7

6.0

7.0

3.2

5.6

4.0

4.9

2.8

9.4

8.2

Creep relaxation〈ASTM F38, tightening stress 20.6 MPa〉
100℃×22h（%）

22.3

42.8

23.5

37.8

27.3

45.0

27.5

47.0

28.7

35.3

31.0

46.1

200℃×22h（%）

45.3

72.3

41.1

65.5

43.6

60.5

52.0

78.8

43.9

53.4

39.7

53.4

Sealability〈φ46×φ67, thickness t 1.5, tightening stress 19.6 MPa, internal pressure 0.98 MPa, N2 gas〉
１００

１５０

１８３

２１４

２００

Temperature (℃)

Note (1) Oil gas, solvent and corrosive fluid are not included, thus requiring separate consultation.
(2) Inflammable gas, gas susceptible to burn and toxic gas are not included, thus requiring separate consultation.

−5

With paste（Pa・m3/s）

1.7×10Without paste（Pa・m3/s）

4.0×10or below−4−5

3.0×10−4

1.5×10−4

2.0×10−3

1.0×10−4

6.0×10−3

3.0×10−4

1.0×10−4

7.0×10−5

6.0×10−4

1.5×10Note ) All the above physical properties are measured examples, and not regulatory values.

▼ NotesIf joint sheets No.6502, No.6503, No.6500, No.6500AC and No.GE200 are used under conditions subject totemperatures exceeding 100°C, gaskets may break due to hardening, thus, the following notes shall be observed:
q Gasket thickness shall be 1.5 mm or less.
w Gasket paste shall be applied (No.5, No.5M, No.6, No.6M, seal paste).
e Tightening stress shall be 30 MPa or higher.
r These joint sheets shall be used for places unlikely to bear piping load, or for places facilitating replacement.
t Whenever possible, use ring gaskets. Full face gaskets have more surface area, requiring additional
compressive load on the gasket.

9

10

GAS K ET

Compressed Non-Asbestos Fiber SheetNONASUPER™

VALQUA No.6502/6500/6500AC/6503/GE200

VALQUA No.8590TN■ Notes to be observed in design and usage ■If used under conditions exceeding 100°C, Compressed Non-Asbestos Fiber Sheet Gasket using rubber may break due tohardening. The following summarizes the points to be observed in the design, storage and installation, in order toensure proper use of Compressed Non-Asbestos Fiber Sheet.
▼ Notes to be observed in design▼ Notes to be observed during installation work

1. Determine the number and size of bolts and gasket
dimensions to provide gaskets with sufficient tightening
stress, and also check the flange construction and bolt
arrangement to ensure uniform distribution of tightening
stress.
2. Surface finish of the flange shall be about 6.3 Ra(reference: 25 S). Excessive smooth finish may cause
slippage on the gasket, leading to crush.
3. Determine the construction, material and dimensions
so as to prevent warpage or bowing of the flange at thetime of application of internal pressure.
4. Consideration shall be given in design to prevent
application of excessive thermal stress or repetitive
bending stress on the joints.
5. Piping design shall not allow accumulation of drain orscale at the flange sections.
6. Consideration shall be given to prevent transmission ofvibration to the joints.

1. When installing gas seals, refer to the following"Countermeasures against permeation leakage".
2. Install the gaskets in a clean environment so as toprevent entry of foreign matters between the gaskets
and the flanges.
3. Flange bolts No.1 to 8 as shown on the figure shall be
gradually tightened in this order at a time, and repeat
this process in four to five steps, so as to finally ensure
uniform tightening.

GASKETNONASUPER™ are manufactured by winding metal strips (SUS304) around the periphery of basic 3.2 mm
thick spiral wound gaskets. The lap wound section of this metal strips around the periphery facilitates
centering at the time of gasket installation, and also enhances the strength of the gasket main body.
Provided with better sealing characteristic than conventional Compressed Asbestos Fiber Sheet, these
NONASUPERs can be used with the same level of tightening force as that of Compressed Asbestos Fiber
Sheet.

NONASUPER™
These are the best suited gaskets to be
used for high temperature utility lines asalternatives for Compressed Asbestos
Fiber Sheet（heat resisting at 450°C）.

VALQUA No.

8590TN
ApplicablefluidsWater, hot water, steam

Applications

Standard pipe flanges in various factories

Dimensions

JIS 10K、10A up to 200A
〈Thicknes〉3.2mm〈Filler color〉CreamComposition

Hoop material : SUS304
Filler material : Non-asbestos inorganic paper▼ Notes to be observed in storage

11▼ Stress strain chracteristics
１６０

No.8590TN t3.2

８０

１０

６０
４０

５

No.1500 t3.0
〔for reference〕

２０
０
０

５

１０

０

３０

２０

１０

０

１５

Strain (%)
Metal hoop-Lapwound part

Gasket main unit

▼ Sealing performance
２５０■ Design data ■▼ Available ranges and tightening stressNo.8590TN
Maximum service temperature（°C）
Pressure rating450
JIS 10K

Recommended tightening stress
（1）
（MPa）

30

Note (1) The tightening stress corresponds to the projectedarea of the gasket main body only, without including the metal
strip lap-wound section.

Test piece: JIS 10 K 80A

２００

１５０

３０
２５

No.1500 t3.0（with paste）〔for reference〕
No.1500 t1.5（with paste）〔for reference〕

２０
１５

１００
１０
５０

No.8596TN t3.2

０
０
１
２
３
Internal pressure to assure sealing (MPa)

５
０

７０
６０
５０
４０
３０
２０
１０
０

NONASUPER™ stress (MPa)

1. Apply gasket paste on the cut surface of the gasket
inner diameter side. Application of gasket paste on thecontact surface between the gasket and the flange islikely to cause crush, so that attention is required intightening, and also the amount of gasket paste shallbe minimized.
2. Maintain the tightening stress to be around 35 MPa.
Also use ring gaskets instead of full-face gaskets, so as
to ensure proper tightening stress.
3. Use gaskets with a minimum thickness as far as
possible (1.5 mm or less).

１５

１００

４０

NONASUPER™ stress (MPa)Tightening force (kN)

１２０

▼ Countermeasures against permeation leakage
Since permeation leakage also occurs in Compressed
Non-Asbestos Fiber Sheet as in the case of conventional
asbestos joints, the following points shall be observed forgas seals.

２０

Test piece: JIS 10 K 80A
１４０

Compressed Fiber Sheet stress (MPa)

1. Ensure perpendicularity of the flange and the pipe.
2. Shaft alignment of the mating flanges shall be ensured.
3. Check for any deformation of flanges.
4. When changing only gaskets for the existing equipment
or at a piping joint, clean the junctions and check forany damage, and repair, if required.
5. Get off the rust at the flange surface, and repair any
dents and dings.
6. Pay attention not to give damage to the gaskets duringstorage up to installation, or during installation work.

4. When tightening, pay attention to prevent theoccurrence of crush.
5. Especially when using gaskets of 150 Lb, 1B or smaller,
or those of smaller gasket width, care shall be given as
gasket stress is likely to be excessive.
6. At the time of load up or restarting, check for any loose
bolts.
7. If retightening of gaskets that have once experienced
leakage failed in preventing leakage, replace them withnew ones.

sMain body made of Non-Asbestos filler having durability
and heat resistance.
sApplicable to steam lines without problem.
sCan withstand impact pressure such as water hammer.
sLonger life than Compressed Fiber Sheet.

Compressed Fiber Sheet stress (MPa)▼ Notes to be observed before installation

FeaturesTightening force (kN)

1. Store these joint sheets in a cool and dark place notsubject to direct sunshine, fresh air or ozone.
2. Storage selected shall be in a clean environment, freefrom dust as well as from high temperature & highhumidity and corrosive atmosphere.
3. If hanged on nails or the like, gaskets may suffer
breakage or permanent deformation, so that, as far aspracticable, they should be put in a can or wrapped in apolyethylene bag and stored in a paper box.
4. Large sized gaskets shall be put between larger plates
without rolling and placed horizontal for storage.

12

GAS K ET

VALFLON™ Gasket

Gasket Paste

GASKET

VALQUA No.7010/7010-EX/7020/7026/7GP61/7GP66

Gasket Paste is an agent employed to enhance the sealing effect of gasket contact surfaces and to
facilitate peeling off gaskets when disassembling joints. This product, containing neither hazardous
materials nor combustible ingredients, will not deteriorate even after long-period storage. Since this paste
can be coated smoothly on Non-Asbestos Fiber Sheet gaskets, it will not damage their surfaces. Select an
optimum type among a variety of products.

These are Sheet Gaskets made of VALFLON™（PTFE）with excellent properties for chemical resistance andnon-stick.（VALFLON is a registered trademark of NIPPON VALQUA for its fluorocarbon resin products）

VALQUALON™ Gasket
VALQUA No.

7020

In order to overcome the cold flow (creep
phenomenon) which is a drawback in PTFE,
these gaskets are shaped by means of a special
manufacturing process where inorganic filler
material is compounded. Provided with heat
resistance, chemicals resistance, and anti-cold
flow property, they are best suited for lines
handling various chemicals (high concentrated
hot sulfuric acid and hot nitric acid, etc.) .
However, as they are not suited for highconcentrated alkali such as sodium hydroxideand hydrofluoric acid, companion products,
No.7026 shall be selected instead for suchapplications. VALQUA No.7020 has obtained the
Safety and Health Certificate of NWC (British
National Water Works Association).

▲No.7020/7026
Black VALQUALON™ Gasket
VALQUA No.

7026

Product name

Description

Applicable fluid

Availabletemperature
range (°C)

Mode of packing

Gasket Paste
No.5

Black paste containing specialoil-soluble adhesivecompounded with fine particles
of graphite.

Water based fluids such as steam, hotwater, water, seawater, acid, alkali, salt
solutions and alcoholー200〜200

2.5 kg inpolyethylene
container

Gasket Paste
No. 5M

White paste containing specialoil-soluble adhesive compoundedwith fine particles of mica.

Water based fluids such as steam, hotwater, water, seawater, acid, alkali andsalt solutions, where white paste is
specially required

Gasket Paste
No.6

Black paste containing special
water-soluble adhesive having highoil and solvent resistance,compounded with fine particles of

VALFLON™ Pure PTFE Gasket
VALQUA No.

graphite.

2.5 kgpolyethylene
containerー200〜900

2.5 kgpolyethylene
container

White paste containing special
water-soluble adhesive having
high oil and solvent resistance,compounded with fine particlesof mica.

Hydrocarbon based fluids such as
petroleum based oil, oil gas, solvent,solvent vapor, animal & vegetable oil,
LNG and general gases, where whitepaste is specially required

ー200〜900

2.5 kgpolyethylene
container

Seal Paste

Light brown paste containing
special non-drying oilyadhesive, compounded withinorganic filler material and asmall amount of solvent.

When handling water, air andhydrocarbons such as gasoline, kerosene,
lubricating oil, natural gas, LPG, coolingmedium, hydrogen sulfide, ethylene,butane, and ethane, and also where theoccurrence of crevice corrosion on theflange surface shall be avoided.

ー50〜300

800 g
metallic
container

Fluororesin powder that iswater-dispersed using
surfactant.

7010

New VALFLON™ Pure PTFE Gasket

7010-EX

100°C）

100 g inmetallic tube,
1 kg inpolyethylene
container

No.7010-EX gaskets are made of "NewVALFLON™" material that has improved anticreeping characteristic, while maintaining thePTFE's excellent properties of heat
resistance, chemicals resistance, and nonstick. Thus, they have a long service life forheat cycles, contributing to extending theoperating life of gaskets.

New VALFLON™ Soft Sheet
VALQUA No.

When highly corrosive fluids such as
strong acids and alkalis or halogens andー200〜300
when oxidizing fluid such as oxygen are（Oxygen gas:required.

These gaskets are made by punching virgin
PTFE sheet. As these are liable to cause cold
flow, gaskets should be installed in grooves or
tongue and groove flanges in principle.

▲No.7010

VALQUA No.

Gasket Paste
No. 6M

New VALFLON™
Paste

13

Hydrocarbon based fluids such as
petroleum based oil, oil gas, solvent,solvent vapor, animal & vegetable oil,
LNG and general gases

ー200〜200

Similar to companion products, No.7020,
No.7026 gaskets have excellent heat
resistance, chemicals resistance, and anticold flow property, so that they are best suitedfor lines handling various chemicals. However,as they are not suited for oxidizing fluids suchas high concentrated hot sulfuric acid and hot
nitric acid, No.7020 shall be used instead forsuch applications.

7GP61(sheet)

These sheets have a specially made meshconstruction, while taking advantage of thePTFE's excellent properties of chemicals
resistance and heat resistance.

VALQUA No.

7GP66▲No.7GP61/7GP66(gasket)14

GAS K ET

VALFLON™ Gasket
VALQUA No.7010/7010-EX/7020/7026/7GP61/7GP66■ Available ranges ■■ Standard dimensions ■▼ Stress strain characteristics of▼ Stress strain characteristics of

VALQUALON™(No.7020/7026)
Temperature（°C）

Pressure（MPa）

VALQUA No.

Nominal thickness（mm）

Size（mm）−50〜100

0.5

7010

1.0、1.5、2.0、3.0

7010-EX−50〜1501.07010-EX

1.5、3.0

Maximum outer
diameter 1300
Maximum outer
diameter 1100

7020
7026

−200〜200

4.0

7020

7GP66

−240〜260

2.0

Temperature and pressure show individual service limit.
Note (1) As for No.7010, grooved flanges should be used in principle.

1.0、1.5

1000×1000

2.0、3.01270×1270

7026

1.5、2.0、3.0

1220×1220

7GP61

0.5、1.0、1.5
2.0、3.0

1500×1500

7GP66

VALFLON™ Soft Sheet (No.7GP66)

Dimension of test piece : JIS 10K 25A

Dimension of test piece : JIS 10K 25A

４０
No.7020
No.7026

t 1.5 mm
t 1.5 mm

t 3.0 mm
t 3.0 mm

３０

Maximum outer
diameter 1450

3mm 2mm 1mm

２０Nominal thickness of gasket

１８Flange surface roughness 12.5S

0.5mm

１６

Stress (MPa)7010 （1）Stress (MPa)

VALQUA No.

２０

１０

１４
１２
１０
８
６
４
２

０

■ Design data ■０▼ m, y values
VALQUA No.

（1）▼ Recommended tightening stress
Thickness
（mm）

3.00

2.0

2.50

3.0

2.00

1.0

3.50

24.52

1.5

3.20

22.55

2.0

3.00

3.0

2.50

0.5〜3.0

2.50

7020
7026

VALQUA No.

Remarks:
The m, y values of VALFLON™ Gaskets are the same as those of fluororesin
gaskets specified in JIS B 2206, while those for 7010, 7010-EX and 7GP66 are
our recommended values.

No.7020

No.7026

No.7010

No.7010-EX

No.7GP66

1.5

3.0

1.5

3.0

Density（kg/m3）

2330

2300

2070

2070

2170

2180

2210

2200

620

670

Tensile strength（MPa）

15.6

15.8

24.2

23.2

30.2

27.3

26.4

24.2

24.0

18.4

Elongation（%）

405

415

370

286

460

445

588

574

334

366

Compressibility（34.3MPa）（%）

4

5

4

5

12

19

20

12

69

71

Remarks

JIS K 7137

48

15・Being liable to suffer cold flow, these have to be used inlocations permitting tightening control including
periodic retightening. Since the gaskets are composed
mainly of thermoplastic PTFE, retightening shall be
performed not under hot temperature condition, but
under cold temperature condition after initial heating.
As for No.7010, grooved flanges should be used inprinciple.

200°C×22h（%）

66.7

42.8

60.8

75.9

88.4

63.7

79.6

51.9

68.3

81.0

79.3

85.5

92.4

97.3

86.0

90.8

59.3

75.3

Remarks: The above values are measured ones, and not regulatory values.

ASTM F38

・Check for any deformation of flanges.
・When changing only gaskets for the existing equipment
or at a piping joint, clean the connecting section andcheck for any damage, and repair, if required.
・Get off the rust at the flange surface, and repair any
dents and dings.
・Pay attention not to give damage to gaskets duringstorage up to installation, or during installation work.
▼ Notes to be observed during installation work

・Consideration shall be given in design to prevent
application of excessive thermal stress or repetitive
bending stress on the joints.

・If gasket paste is to be used, apply a minimum amountof "VALFLON Paste" uniformly. Also care shall be
exercised after application of paste, to prevent
adhesion of dust and the like.

・Consideration shall be given to prevent transmission ofvibration to the joints.

16

55.0

・Shaft alignment of the mating flanges shall be ensured.

・Install the gaskets in a clean environment so as toprevent entry of foreign matters between the gaskets
and the flanges.

▼ Notes to be observed in storage
Creep relaxation（20.6MPa）
37.2
100°C×22h（%）

０・Determine the construction, material and dimensions so
as to prevent warpage or bowing of the flange at thetime of application of internal pressure.

・Piping design shall not allow accumulation of drain orscale at the flange section.
JIS R 3453

63

０.５

・Check perpendicularity of the flange and the pipe.

3.0

51

１.０

・Determine the number and size of bolts and gasket
dimensions to provide gaskets with sufficient tightening
stress, and also check the flange construction and bolt
arrangement to ensure uniform distribution of tightening
stress.

1.5

64

１.５

24.5

3.0

63

２.０

Gasket thickness (mm)

20.0

1.5

67

２.５

▼ Notes to be observed before installation

3.0

54

３.０

▼ Notes to be observed in design

1.5

69

３.５

15.0

Thickness（mm）

Recovery（34.3MPa）
（%）

６

10.0

▼ Characteristic values of VALFLON™ Gasket
Item５■ Notes to be observed in design and usage ■Note (1) These tightening stress are the pressures required undernormal conditions, and correspond to the projected areaof the gasket, where fluid pressure is not taken into
consideration.
Note (2) As for No.7010, grooved flanges should be used inprinciple.

19.61

４

Gas

7020
7026

19.61

３

Strain (%)

Liquid7010 （2）7010-EX

14.71

２

Recommended tightening
stress（MPa）

19.61

1.0/1.57010
7010-EX

7GP66

Gasket factor Minimum design seatingstress "y" (N/mm2)"m"

１

・Store these products in a cool and dark place notsubject to direct sunshine.
・Storage selected shall be in a clean environment, freefrom dust as well as from high temperature & highhumidity and corrosive atmosphere.
・If hanged on nails or the like, gaskets may suffer
breakage or permanent deformation, so that, as far aspracticable, they should be put in a can or wrapped in apolyethylene bag and stored in a paper box.

・Flange bolts shall be gradually tightened at a time, andrepeat this process in four to five steps, so as to finallyensure uniform tightening.
・When tightening, pay attention to prevent theoccurrence of crush. Especially when using gaskets of
150 Lb, 1B or smaller, or those of smaller gasket width,care shall be given as gasket stress is likely to be
excessive.
・At the time of load up or restarting, be sure to carry out
retightening.
・If retightening of gaskets that have once experienced
leakage failed in preventing leakage, replace them withnew ones.

・Large sized gaskets shall be put between larger plates
without rolling and placed horizontal for storage.

15

16

GAS K ET

VALFLON™ Envelope Gasket
VALQUA No.N7030/N7031/N7035

VALFLON™ (PTFE) Envelope Gasket using Compressed Non-Asbestos Fiber Sheet and Flexible Graphite
in the core. According to the construction of the core, three types are available, that is, N type, S type andH type, and further three types of envelope configuration are also available.

■ Available ranges ■VALQUA No.

N7030（N）
N7031（N）
N7035（N）

General use Envelope Gasket using
Compressed Non-Asbestos Fiber
Sheet in the core.

N7030（S）
N7031（S）
N7035（S）

High temperature & high pressure use
Envelope Gasket for preventing theflow of PTFE jacket, where
Non-Asbestos Felt Sheets areattached on both sides of theCompressed Non-Asbestos Fiber
Sheet to form the core.

Pressure（MPa）

VALQUA No.

Nominal thickness（mm）

N7030（N）

N7030（N）
N7031（N）
N7035（N）

VALFLON™ Envelope Gasket
VALQUA No.

Temperature (°C)

VALQUA No.

VALFLON™ Envelope Gasket■ Standard dimensions ■（1）−100〜150

1.5

N7031（N）

1000
1.6, 2.8, 3.8

N7035（N）−100〜200

N7030（H）
N7031（H）
N7035（H）−100〜260（1）

N7031（S）

2.0

300〜3000
1000

N7030（S）

N7030（S）
N7031（S）
N7035（S）

Size（mm）

1000
2.9, 3.2, 5.4

N7035（S）

300〜3000
1000

N7030（H）
N7031（H）

3.0

4.0、5.6

950

N7035（H）

Temperature and pressure show individual service limit.
Remarks: Make use of the above figures as a guide for selecting thegaskets.
Note (1) In case the service temperature exceeds 120°C, be sure totighten uniformly so as not to apply piping stress on thesegaskets. For applications subject to frequent thermal variations
or pressure changes, or where maintenance is not facilitated,
WHITETIGHT™ (No.7590 Series) is recommendable.

VALFLON™ Envelope Gasket
VALQUA No.

N7030（H）
N7031（H）
N7035（H）

Envelope Gasket that can be used
under condition subject to still higher
temperature, where Non-Asbestos Felt
Sheet are attached on both sides of
the VALQUAFOIL™ (expandedgraphite) Sheet incorporating thinstainless steel sheet to form the core.

▼ Types

N typeVALQUA No.

S typeVALFLON™（PTFE）Jacket

VALFLON™（PTFE）Jacket

Non-Asbestos Felt Sheet

H typeVALFLON™（PTFE）Jacket
Non-Asbestos Felt Sheet■ Design data ■▼ m, y values▼ Recommended tightening stress

VALQUA No.

Gasket factor"m"

Minimum design
seating stress "y"（N/mm2）

N7030 Series

3.5

14.71

N7031 Series

4.0

19.61

N7035 Series

3.5

14.71

Remarks:
These m, y values are the same as those of fluororesin gaskets specified in
JIS B 2206.

VALQUA No.

Recommended tightening stress（MPa）
LiquidGas

N7030 Series
N7031 Series

15.0

20.0

N7035 Series

20.0

24.5

▼ Stress strain characteristics of VALFLON™

Envelope Gaske(No.N7030)

N7030 Series
Dimension of test piece : JIS 10K 100A
３０

VALFLON™（PTFE）Jacket

Compressed Non-Asbestos Fiber Sheet
VALFLON™（PTFE）Jacket
Non-Asbestos Felt Sheet

Compressed Non-Asbestos Fiber SheetThin stainless steel sheet
VALQUAFOIL™(expanded graphite)Sheet（1）

VALFLON™（PTFE）Jacket

VALFLON™（PTFE）Jacket
Non-Asbestos Felt Sheet

t２.８mmt３.２mmt４.０mmVALFLON™（PTFE）Jacket
Non-Asbestos Felt Sheet

N7031 SeriesCompressed Non-Asbestos Fiber Sheet

N7030（N） N7030（S） N7030（H）

Thin stainless steel sheet
VALQUAFOIL™(expanded graphite)Sheet

Stress (MPa)Compressed Non-Asbestos Fiber Sheet

２０

１０

VALFLON®（PTFE）Jacket
Non-Asbestos Felt Sheet
００N7035 Series

１０

２０

３０

４０

５０

Strain (%)

Compressed Non-Asbestos Fiber Sheet

Compressed Non-Asbestos Fiber SheetThin stainless steel sheet
VALQUAFOIL™(expanded graphite)Sheet

Remarks : As special purpose VALFLON™ Envelope Gaskets, products for monomers, for radiation resisting use, and for outer edge welded type are available
Further information is available on request.
Note (1) No.N7031 Series has a PTFE outer cover with one lap joint.

17

18

GAS K ET

VALQUA No.N7030/N7031/N7035■ Notes to be observed in design and usage ■▼ Notes to be observed in design▼ Notes to be observed before installation

・Determine the number and size of bolts and gasket
dimensions to provide gaskets with sufficient tightening
stress, and also design the construction so as to ensure
uniform distribution of tightening stress.
・Determine the construction, material and dimensions sothat the flange is not likely to cause rotation.
・Consideration shall be given in design to prevent
application of excessive thermal stress or piping stresson the joints.
・Piping design shall not allow accumulation of drain orscale at the flange section.
・Consideration shall be given to prevent transmission ofvibration to the joints.
・Although the likelihood of occurrence of cold flow in the
VALFLON™ (PTFE) has been reduced by adopting
flexible core materials, prolonged operation or heat
cycles may cause bolts to be loosened. Therefore,
these gaskets have to be used in locations permitting
periodic checks of loose bolts and also allowing
appropriate tightening force to be applied.
・When installing these gaskets onto titanium flanges,
check to see if fluids to be handled contain chlorine
ions, as even a trace amount of chlorine ions may cause
crevice corrosion to develop on the titanium surface incontact with the gaskets. To prevent the occurrence of
this crevice corrosion, titanium-palladium alloy isrecommended.
・The inner diameter of VALQUA No.N7035 Series has asquare shape, which serves to eliminate accumulationof liquids, if the gaskets are properly dimensioned tomeet the flange inner diameter. For further details,
please contact us, as gaskets can be dimensioned tomeet the flange inner diameter.
・Even when resin, glass or hard rubber lined flanges
comply with JIS flange standards, their inner diameteror the outer diameter in contact with the gaskets aredifferent from the standards. It is therefore necessary to
determine the gasket dimensions in conformity with thesize of each flange. Further information in this regard isavailable on request. Also products are available on
request, where the joint sheet has a core made ofcorrugated metallic sheet.

・Check perpendicularity of the flange and the pipe.
・Shaft alignment of the mating flanges shall be ensured.
・Check for any deformation of flanges.
・ When changing only gaskets for the existing
equipment or at a piping joint, clean the connecting
section and check for any damage, and repair, if
required.
・Get off the rust at the flange surface, and repair any
dents and dings.
・Pay attention not to give damage to gaskets duringstorage up to installation, or during installation work.

▼ Notes to be observed in storage
・Store these products in a cool and dark place notsubject to direct sunshine.
・Storage selected shall be in a clean environment, freefrom dust as well as from high temperature & highhumidity and corrosive atmosphere.
・If hanged on nails or the like, gaskets may suffer
breakage or permanent deformation, so that, as far aspracticable, they should be put in a can or wrapped in apolyethylene bag and stored in a paper box.
・Large sized gaskets shall be put between larger plates
without rolling and placed horizontal for storage.
・If Non-Asbestos Felt got wet with aqueous liquids, its
crush strength decreases. It is therefore necessary tokeep it dry in a polyethylene bag, and also not to tighten
when wet.

19

VALQUA No.7GS66A/7GS62A/7GS64N

Cord Seal™ <Soft> is a marsh mallow shaped free-size sealing material, which has been modified to beflexible and rich in toughness, while maintaining the PTFE's excellent chemicals and heat resistance.
Three types with different cross sections are available: ● oval type ● flat type ● round type.
Cord Seal™〈Soft〉[Rope type]
VALQUA No.

7GS64N

Rope shaped products with a roundcross section [Rope type] withoutadhesive.

■ Standard dimensions ■Nominal dimension〔diameter（mm）〕

Length（m）

2

40

4

20

6

10

8

7

Cross section▼ Notes to be observed during installation work
・Install the gaskets in a clean environment so as toprevent entry of foreign matters between the gaskets
and the flanges.
・If gasket paste is to be used, apply a minimum amountof "VALFLON™ Paste" uniformly. Also care shall be
exercised after application of paste, to prevent
adhesion of dust and the like.
・Flange bolts shall be gradually tightened at a time, andrepeat this process in four to five steps, so as to finallyensure uniform tightening.
・As the VALFLON™ (PTFE) outer cover is slippery, crush
may occur, if an excessive torque has been applied at
the time of tightening or if it is not uniformly tightened.
And this is particularly the case for smaller diameter
ones, so that care should be exercised in tightening so
as not to apply gasket stress exceeding 49.0 MPa.
・A small gap between flanges present at the time ofgasket replacement would cause the VALFLON™
(PTFE) outer cover to touch the outside diameter ofraised face or the flange inside, and fold over.
Tightening in this condition may be a cause of leakage.
In order to prevent such fold over of the VALFLON™
(PTFE) outer cover, the gasket-outer edge welded type(ODS type) is available. Further information in thisregard is available on request.
・At the time of tightening gaskets, air contained in thecore material may be discharged, so that be careful not
to mistake it for leakage when a leakage test is
performed using soap water. Our recommendation is tocheck leakage sometime after tightening the gaskets.
・ Insufficient tightening force may lead to permeation ofsoap water for airtightness test or rain water, causing
the Non-Asbestos Felt Sheet to soften and squeezed
out from the gaskets. In such a case, gasket stressdecreases, which may result in leakage.
・At the time of load up or restarting, be sure to carry out
retightening.
・If retightening of gaskets that have once experienced
leakage failed in preventing leakage, replace them withnew ones.

GASKET

Cord Seal™〈Soft〉

VALFLON™ Envelope Gasket

10

5

12

■ Available ranges ■Cord Seal™〈Soft〉[Oval type]
VALQUA No.

7GS66A

String shaped products with an oval crosssection [string type] and adhesive toimprove workability.

6

Cross section

Length
（mm）

3

1.5

30

6

3.0

15

9

4.0

8

12

5.0

16
20

5

6.0

Cord Seal™〈Soft〉[Tape type]
VALQUA No.

7GS62A

Belt shaped products (1 to 3 mm thick)with a flat cross section [tape type] andadhesive.

■ Standard dimensions ■Nominal dimension Thickness〔width（mm）〕（mm）

Cross section

Length
（mm）

20
30

1

15

2

5

3

5

50
20
30
50
20
30
50

9

12

−240〜260

Temperature（°C）■ Standard dimensions ■Nominal dimension Thickness〔width（mm）〕（mm）〔for No.7GS66A〕

Nominal dimension〔width（mm）〕

Pressure（MPa）

Gas

2.0

Liquid

4.9

Temperature and pressure show individual service limit.

■ Selection guide ■sThe smaller the cross section size, the higher the sealingpressure, in so far as the flange surface is in goodcondition.
sThe widths after tightening of Cord Seal™ <Soft>
No.7GS66A and No.7GS64N will be about 1.5 to 2.5
times the nominal dimension. Thus, select the productswith a width about one half or less the contact width of
the gaskets to be used. The following table provides ameasure showing the relationship between the flange
nominal dimension and the nominal dimension of theCord Seal™ <Soft> No.7GS66A.
Flange nominal
dimension〜500A

Nominal dimension ofCord Seal™ <Soft>

3〜9

500〜1000A 1000〜1500A 1500A〜
6〜12

9〜12

12〜20

■ Applications ■sGaskets for large diameter equipment which is liable tohave rough finished flange surface, increased strain, orinsufficient tightening force.
sGaskets adopting FRP, glass, glass lining, resin lining,rubber lining, ceramics or non-penetrant graphite, to be
used for towers & tanks, ovens, heat exchangers andpressure vessels.
sGaskets for duct flanges and pipe flanges.
sGland packing for valves.

20

GAS K ET

VALQUAFOIL™ Gasket
VALQUA No.VF-30/VF-35E/VFT-30/VFT-35E

Making use of the characteristics of the pure graphite sealing material VALQUAFOIL™, these gaskets are
excellent in heat and chemicals resistance as well as radiation resistance, and are applicable to wide
temperature ranges from very low to high temperatures. Gaskets with PTFE sheet lamination on both sides
are also available. ("VALQUAFOIL®" is our registered trademark for our Flexible graphite)■ Available ranges ■Temperature（°C）

VALQUA No.
VF-30

VALQUA No.

VFT-30VF-30

VF-30 Gasket is made by forming
VALQUAFOIL™ into sheet, which is thenpunched into a specified flat shape.

（VF Sheet）

Pressure（MPa）

5.0

5.0

Temperature and pressure show individual service limit.
Remarks: Not applicable to oxidizing acids such as hot, concentrated
sulfuric acid and concentrated nitric acid.
Note (1) VFT gaskets may stick at temperatures exceeding 250°C.

VF-35E(VF Sheet withthin stainlesssteel sheet）

VALQUA No.

This gasket is made by attaching
VALQUAFOIL™ Sheets on both sides of athin stainless steel sheet (0.05 mm thick),which is then punched into a specified flat
shape.

VFT-30（VF Sheet）

VALQUAFOIL™ Gasket

With a view to enhancing the sealing
property, No.VFT-30 gasket is made bylaminating PTFE sheets (soft type) on bothsides of No.VF-30, which is then punched
into a specified flat shape. Even with a low
tightening force, sufficient sealing property
is expected, together with adhesion
suppression on the flange surface.

VALQUA No.

VFT-35E(VF Sheet withthin stainlesssteel sheet）

0.4、0.8、1.0

980×1000

VF-30

1.2

730×1000

1.6、3.0600×1000

VF-35E

0.8、1.6、3.0

1000×1000

0.5、0.8、1.0

1000×10000（1）1.51000×1000

0.8、1.6、3.0

1000×1000

VFT-35E

Note (1) Products as long as 10 m are also available for VFT-30 withthicknesses 0.5, 0.8 and 1.0 mm. Further information in thisregard is available on request.

■ Design data ■▼ m, y values

VALQUA No.
VALQUAFOIL™ Gasket

Size（mm）

VFT-30VALQUAFOIL™ Gasket
VALQUA No.

Nominal thickness（mm）

2.0

（1）

−240〜300

VFT-35E

VALQUA No.

2.0−240〜400

VF-35EVALQUAFOIL™ Gasket■ Standard dimensions ■▼ Recommended tightening stress
Gasket factor
"m"

VF-30

With a view to enhancing the sealing
property, No.VFT-35E gasket is made bylaminating PTFE sheets (soft type) on bothsides of the No.VF-35E, which is thenpunched into a specified flat shape. Even
with a low tightening force, sufficientsealing property is expected, together withadhesion suppression on the flange
surface.

Minimum design
seating stress "y" (N/mm2)（1）
Liquid（steam）

Gas（2）

26.0

VF-35E

2.0

29.4

39.2

VFT-3026.0

26.0

VFT-35E

29.4

29.4

Note (1) In accordance with the description in JPI-7R-70-88.
Note (2) Shows our recommended tightening force corresponding to thegasket projected area.

pressure（MPa）

VALQUA No.

Liquid

Gas

VF-30

26.0

VF-35E

30.0

VFT-3026.0

26.0

VFT-35E

30.0

30.0

40.0

Note (1) The recommended tightening stress are thepressures required under normal conditions, andcorrespond to the projected area of the gasket, where
fluid pressure is not taken into consideration.

▼TypesNo.VF-30

No.VF-35E

No.VFT-30

PTFE Sheet（soft type）

Flexible graphite
Flexible graphite

Thin stainlesssteel sheet

No.VFT-35E

PTFE Sheet（soft type）▼ Characteristic values of VALQUAFOIL™ Gasket
No.VF-35E（1）No.VF-30

Item

Flexible graphite

Thickness（mm）

1.6

3.0

1.6

3.0

Thin stainlesssteel sheet

Density（kg/m3）

1067

1054

1216

1143

Tensile strength（MPa）

3.8

3.8

15.6

10.3

Compressibility（34.3 MPa）（%）

45

43

42

42

Recovery（34.3 MPa)（%）

11

12

12

13

100°C×22h（%）

7.3

12.4

9.5

9.2

200°C×22h（%）

10.7

14.4

10.2

16.4

Remarks

JIS R 3453

Creep relaxation（20.6 MPa）
Flexible graphite

PTFE Sheet（soft type）

Remarks: In addition to the above, also available are VALQUAFOIL® Gathered Tape (No.VF-50), VALQUAFOIL® Flat Tape with Adhesive (No.VF-60),
and VALQUAFOIL® Gathered Tape with Adhesive (No.VF-70). Further information in this regard is available on request.

21

ASTM F38

Remarks: The above values are measured ones, and not regulatory values.
Note (1) These characteristic values correspond to those incorporating a thin stainless steel sheet.

22

GAS K ET

Spiral Wound Gasket

VALQUAFOIL™ Gasket
VALQUA No.VF-30/VF-35E/VFT-30/VFT-35E

VALQUA No.8590 Series/ No.8590L Series▼ Stress strain characteristics of▼ Stress strain characteristics of

VALQUAFOIL™ (No.VF-30)

VALQUAFOIL™ (No.VF-35E)

Dimension of test piece : JIS 10K 25A
４０

t 3.0 mm
t 1.5 mm

t 1.5 mm
t 3.0 mm
３０

Stress (MPa)Stress (MPa)

３０

２０

２０

１０

１０

０

０
０

Non-Asbestos Spiral Wound Gaskets use Non-Asbestos
inorganic paper, VALQUAFOIL™ (expanded graphite) and
VALFLON™ (PTFE) tape as filler materials, and exhibit goodelasticity by means of a V-shaped hoop.
("VALQUAFOIL™ " is our registered trademark for our expandedgraphite)("VALFLON™ " is our registered trademark for our fluororesin
products)

Dimension of test piece : JIS 10K 25A

４０

１０

２０

３０

４０

５０

Strain (%)

０▼Types

１０

２０

３０

４０

５０

Basic type

With inner ringWith outer ringWith inner & outer rings

Non-asbestos inorganic
paper

No.8590

No.8592

No.8591

No.8596

Non-asbestos inorganic paper,
VALQUAFOIL™ tape

No.8590L

No.8592L

No.8591L

No.8596L

BLACKTIGHT™
No.6590 Series (1)VALQUAFOIL™ tape

No.6590

No.6592

No.6591（1）No.6596

WHITETIGHT™
No.7590 Series (1)

VALFLON™ tape

No.7590

No.7592

No.7591（1）No.7596

Name

Lined CLEANTIGHT™
No.8590L Series■ Notes to be observed in design and usage ■▼ Notes to be observed in design▼ Notes to be observed before installation

・Determine the number and size of bolts and gasket
dimensions to provide gaskets with sufficient tightening
stress, and also check the flange construction and bolt
arrangement to ensure uniform distribution of tightening
stress.
・In case of considering as an alternative for Compressed
Fiber Sheet, be careful about the pipe length, as thecompressibility will be larger than the Compressed
Fiber Sheet.
・Determine the construction, material and dimensions so
as to prevent warpage or bowing of the flange at thetime of application of internal pressure.
・Consideration shall be given in design to prevent
application of excessive thermal stress or repetitive
bending stress on the joints.
・Piping design shall not allow accumulation of drain orscale at the flange section.
・Consideration shall be given to prevent transmission ofvibration to the joints.

・Check perpendicularity of the flange and the pipe.
・Shaft alignment of the mating flanges shall be ensured.
・Check for any deformation of flanges.
・When changing only gaskets for the existing equipment
or at a piping joint, clean the connecting section andcheck for any damage, and repair, if required.
・Get off the rust at the flange surface, and repair any
dents and dings.
・Pay attention not to give damage to gaskets duringstorage up to installation, or during installation work.
Particular care is needed as they are more liable to bedamaged than Compressed Fiber Sheet.

・Handle these products with care, as their sheet surface
is liable to be damaged.
・Store these products in a cool and dark place notsubject to direct sunshine.
・Storage selected shall be in a clean environment, freefrom dust as well as from high temperature & highhumidity and corrosive atmosphere.
・If hanged on nails or the like, gaskets may suffer
breakage or permanent deformation, so that, as far aspracticable, they should be put in a can or wrapped in apolyethylene bag and stored in a paper box.
・Large sized gaskets shall be put between larger plates
without rolling and placed horizontal for storage.

23

Filler material

Strain (%)

CLEANTIGHT™
No.8590 Series▼ Notes to be observed in storage

GASKET

Note (1) Since No.6591 and No.7591 may cause radial buckling in the inner diameter side depending on service conditions, employ gaskets
with inner & outer rings as far as possible.

CLEANTIGHT™
VALQUA No.

8590
SeriesFeaturessThey have heat resistance comparable to that of asbestos
fillers.

sThe filler is cream, without using any coloring agent.
sThey can be used with the same design (m, y values, etc.) as▼ Notes to be observed during installation work
・Install the gaskets in a clean environment so as toprevent entry of foreign matters between the gaskets
and the flanges.
・If gasket paste is to be used, apply a minimum amountof the paste uniformly. Also care shall be exercised
after application of paste, to prevent adhesion of dust
and the like.
・Flange bolts shall be gradually tightened at a time, andrepeat this process in four to five steps, so as to finallyensure uniform tightening.
・When tightening, pay attention to prevent theoccurrence of crush. Especially when using gaskets of
150 Lb, 1B or smaller, or those of smaller gasket width,care shall be given as gasket stress is likely to be
excessive.
・At the time of load up or restarting, be sure to carry out
retightening.
・If retightening of gaskets that have once experienced
leakage failed in preventing leakage, replace them withnew ones.

These Spiral Wound Gaskets use non-asbestos based inorganic
paper instead of conventional asbestos filler, and are more
economical compared to other products employing non-asbestos
fillers (VALQUAFOIL™ or VALFLON™).

the conventional VALQUATIGHT™ (spiral wound gaskets using
special asbestos paper for fillers).
sThey are more economical compared to other products
employing non-asbestos fillers(VALQUAFOIL™ or
VALQUALON™).
sAlso available are products complying with nuclear power
specifications.

Applications

Suited as gaskets at junctions for pipe flanges, heat exchangers,
towers & tanks, valve bonnets and other equipment that handle
high temperature & high pressure fluids used in various industries
including oil refining, chemical, power, gas and shipbuilding.

Lined CLEANTIGHT™
VALQUA No.

8590L
SeriesFeatures
Applications

These are Spiral Wound Gaskets where VALQUAFOIL™ tape iswound in the middle of the CLEANTIGHT™ gaskets. Inclusion ofwound VALQUAFOIL™ tape enhances airtightness, while heat
resistance is also greatly improved by means of oxidization
prevention effect on graphite due to non-asbestos based
inorganic paper.

sBetter airtightness than CLEANTIGHT™
sHeat resistance comparable to asbestos products, 600°C
Almost the same as those for CLEANTIGHT™, but better suited
for applications specially requiring airtightness and heat
resistance.

24

G A S KET

Metal Jacketed Gasket

Spiral Wound Gasket
VALQUA No.6590 Series/ No.7590 Series

VALQUA No.N510 Series/ N520 Series

BLACKTIGHT™
VALQUA No.

6590

SeriesFeatures

Applications

GASKET

Using pure graphite (expanded graphite) sealing material, VALQUAFOIL™, as filler
material, these Spiral Wound Gaskets have excellent sealing property and also
good in response to heat and pressure cycles.
sExcellent airtightness greatly improves sealing performance against gas ingeneral and vacuum.
sExcellent response to heat and pressure cycles reduces the frequency ofretightening.
sThey also have excellent radiation resistance (products complying nuclear
power specifications are available).
sThey exhibit excellent sealing property at very low temperatures. (No.6596VC
type has been developed for very low temperature use. Further information isavailable on request.)

These gaskets are composed of carefully selected cushion materials such as non-asbestos millboard, ceramic
fiber, compressed non-asbestos sheet and PTFE sheet with external metal jacket of carbon steel, stainless steel,copper, etc. They are widely used on piping flanges, joints of machinery and heat exchangers because they can be
fabricated not only to a regular round shape but also to other irregular shapes such as oval, rectangular, etc. withadditional partition or partitions to seal multi-pass heat exchangers. An increased demand has recently been seen
for a special type having attached expanded graphite tapes on both sealing faces to increase sealability.
Non-Asbestos Metal Jacketed Gasket
These gaskets are composed of carefully
selected cushion materials such as nonasbestos millboard, ceramic fiber,compressed non-asbestos sheet andPTFE sheet with two sheets of corrugatedthin metal jackets. A complete sealing canbe assured with low seating stress. A
labyrinth effect can also be expected from
corrugation.

VALQUA No.

N510（double-jacketed
corrugated）

Suited as gaskets at junctions for pipe flanges, heat exchangers, towers & tanks,
valve bonnets and other equipment used in various industries including oil refining,chemical, power, gas, shipbuilding and iron making, and in particular best suited
as gaskets for use handling high temperature & high pressure steam, as well asvery low temperature fluids such as LNG, liquid nitrogen and liquid hydrogen.

WHITETIGHT™
Non-Asbestos Metal Jacketed Gasket
VALQUA No.

7590
SeriesFeaturesUsing VALFLON™ (PTFE) tape having excellent chemicals resistance as filler
material, these Spiral Wound Gaskets have precedence over other filler materials
in sealing corrosive fluids and airtightness, thus are suited as gas in general andvacuum seals.

Applications

Suited as gaskets at junctions for pipe flanges, heat exchangers, towers & tanks,
valve bonnets and other equipment used in various industries including oil refining,chemical, power, gas, shipbuilding and iron making. And in particular best suited as
gaskets for seals for corrosive fluids and oxygen which can not be handled by othertypes of spiral wound gaskets, as well as for gas in general and vacuum seals.

■ Available ranges ■■ Design data ■VALQUA No.

▼ For standard pipe flanges
For JIS pipe flanges＝10K、16K、20K、30K、40K、63K
For JPI and ANSI pipe flanges＝Classes 150, 300, 400, 600, 900, 1500, 2500
Gaskets complying with other standards such as ASME and MSS arealso available.

＊ Round type gaskets areavailable.

Gasket thickness

Manufacturing ranges（mm）

6.4mm（W）

300〜4000

4.5mm（V）

10〜3000

3.2mm（T）

10〜1500

1.6mm（P）

10〜150Remarks:
The sign "( )" shows thickness classifications.
In case of products with gasket thickness of 1.6 mm, only
the basic type with hoop made of SUS316 are available.

▼ Component metallic materials
The following materials are available for hoops and inner & outer rings.
Other materials, if requested, may be available depending on separate
consultation.
Metallic material
Carbon steel （1）SUS321

SUS304

SUS347

SUS304L

Titanium

SUS316

NickelSUS316L

Monel metal

Note (1) Carbon steel is used only for inner & outer rings.

258590 Series
8590L Series
6590 Series
7590 Series

Non-Asbestos Metal Jacketed Gasket (with VALQUAFOIL™ adhered)
VALQUA No.

N6510
N6520

Non-Asbestos Metal Jacketed Gasket

VALQUAFOIL™ is adhered on both sides of
No.N510/No.N520 to enhance sealing
performance.

VALQUA No.

N520-C（grommet-finished）

Cut surface on the inner diameter side ofsheet gaskets made of Compressed NonAsbestos Fiber Sheet and the like iscovered with a thin metallic sheet(grommet-finished), which contributes topermeation leakage prevention anderosion prevention.

▼TypesTemperature（°C）

Pressure（MPa）−200〜500＊−200〜600

No.N510

No.N520

No.N6510

No.N6520

No.N520-C

30−270〜450−260〜300

20

Temperature and pressure show individual service limit.

▼ For non-standard pipe flanges
Gaskets for each type ofequipment such as heatexchangers, pressure
vessels, valve bonnets
are also available, as
shown in the table.

N520（double-jacketed）

sTogether with excellent corrosion resistance and proper selection of hoopmaterials, they can be applied to almost all fields of applications.
sExcellent airtightness greatly improves sealing performance against gas ingeneral and vacuum.

These are flat metal jacketed Gaskets
whose core is made of non-asbestos
millboard and covered with two metallic
sheets on its outside.

VALQUA No.

Remarks: The above temperature ranges vary depending on the material used for the hoops
and the inner & outer rings.
＊Temperatures 500 to 600°C may be allowed depending on service conditions. In case ofusing 8590 Series for temperatures exceeding 500°C, the following shall be observed:
Adequate tightening shall be performed initially. Further information is available on request.
Their sealing property is equal to that of spiral wound gaskets using asbestos fillers. For
applications requiring higher airtightness, No.8590L series are recommendable.

■ Design data ■▼ m, y values
The m, y values of Non-Asbestos Spiral Wound Gaskets are the sameas those defined in the Appendix 3 to JIS B 8265.
Gasket factor "m"Minimum design seating stress "y"（N/mm2）

3.00

68.94

Non-asbestos
cushion material

Non-asbestos
cushion material

VALQUAFOIL™
Non-asbestos
cushion material

Non-asbestos
cushion material

Non-asbestos
cushion material

Remarks: Excepting for products attached with VALQUAFOIL™, gasket paste (seal paste or No.6M) shall be used in principle.

■ Available ranges ■VALQUA No.

Temperature（°C）

N510

Dependingon cover metal ＊

N520
N6510
N6520

■ Standard dimensions ■Pressure（MPa）

7.0−240〜400

In case of low pressure gaskets, the bolt loading obtained by the above m and y values
may not offer sufficient sealing performance. It is thus recommended to adopt thetightening stresses given in the table below, which are to be applied to the projected area
(total contact area) of gaskets as minimum tightening pressures. That is, first, calculate thetightening forces (Wm1 and Wm2) using the Appendix 3 to JIS B 8265, and also obtainthe tightening forces from the below given recommended tightening stresses and the total
contact areas. Then, choose the bigger one between the above two tightening forces andapply it as the minimum tightening force.

＊As for maximum service temperatures for component metallic materials,
refer to "Maximum service temperatures for gasket metallic materials(for reference)" on page 27.

No.8590 Series
Types
No.6590 Series
No.7590 Series（Non-Asbestos（filler materials） （VALQUAFOIL™ tape） inorganic paper） （VALFLON™ tape）▼Component metallic materials

Tightening stress（N/mm2）per
49.0
68.6
34.3
gasket contact area
Remarks: Separate consultation is required, where flange deformation is anticipatedfor large diameter gaskets.

VALQUAFOIL™

N520-C

Depending on core material

Any forms are available. As for dimensions, products with amaximum diameter of about 3,000 mm can be manufactured,
while still larger ones may also be fabricated at site uponrequest. It is also possible to manufacture highly reliable
products with minimized junctions of cores of gasket (patented
manufacture) to be used for heat exchangers and the like.
Further information in this regard is available. In case of
No.520-C, limiting dimensions depend on core materials used.

Major metallic materials include low carbon steel, copper, stainless steel(304,304L, 316, 316L, 321, 347, etc.), 5Cr-0.5Mo steel, monel metal,
titanium, nickel, aluminum, aluminum bronze, and lead.

26

GAS K ET

VALQUA No.N510 Series/ N520 Series

VALQUA No.540 Series/ 6560 Series/ 560 Series/ 6540H Series

These gaskets are manufactured from cold rolled metal plate, and include flat gaskets made of metallic sheet
which is processed into a specifield dimension and shape, and serrated gaskets with concetric grooves toimprove sealing property.

■ Design data ■▼ m, y values
Cover material

Gasket factor "m"Minimum design
seating stress "y"（N/mm2）

Soft aluminum

2.50

20.01

Soft copper or brass

2.75

25.50

Iron or soft steel

3.00

30.99

Monel or 4 - 6% chrom

3.25

37.95

Stainless steels

3.50

VALQUA No.

N510 Series

N520 Series（2）■ Available ranges ■VALQUA No.

540
Seriestemperature

Depending on component metallic materials＊

44.82

Pressure（MPa）

14.0＊ As for maximum service temperatures for component metallic materials, refer
to "Maximum service temperatures for gasket metallic materials (for reference)"on page 27.

Soft aluminum

3.25

37.95

Soft copper or brass

3.50

44.82

Iron or soft steel

3.75

52.37

Monel

3.50

55.11

Monel or 4 - 6% chrom

3.75

62.08

Stainless steels

3.75

62.08

▼Recommended tightening stress
Recommended tightening
stress（MPa）
Gas

SPCC

30

100

Cu

45

140

SUS304

70

200

Al

20

60

Note (1) The above shows pressures without application of gasket
paste. When gasket paste is used, the values for liquid apply.
Note (2) In case of N520-C, refer to the recommended tightening
stress for the core material.

6540H
Series▼Component metallic materials
Metallic materials include soft steels, pure iron, stainless steels(304, 304L, 316, 316L, 321, 347, 310S), 5Cr-0.5Mo steel, copper,
monel metal, titanium and nickel.

Dimension of test piece : ANSI 300Lb-2B（1）

Liquid560
Series▼ Stress strain characteristics of Non-Asbestos
Metal Jacketed Gaskets (No.N520)

１６０
１４０

Cover material: SPCC

１２０
Stress (MPa)N520

Cover material

6560
SeriesTemperature and pressure show individual service limit.
Remarks:
Heat resisting temperature of products with VALQUAFOIL™ attachedis 400°C. Applications subject to temperatures exceeding 400°C
require separate consultation.

Note (1) The minimum design seating stress "y" correspond to values obtained when applied with gasket paste.
Note (2) For No.520-C, the m, y values of core materials are applied.

VALQUANo.

GASKET

Metallic Serrated and Flat Gasket

Metal Jacketed Gasket

１００

VALQUA
No.

Name

560
Series

Metallic Flat Gasket

6560
Series

Metallic Flat Gasket
with VALQUAFOIL™
attached

８０
６０■ Applications ■▼Types of products

４０
２０
０
０

540
Series１０２０Strain (%)

３０

Cross section

Upon placing order
VALQUAFOIL™ VF-30

Serrated Gasket

４０

6540H
SeriesSerrated Gasket with
VALQUAFOIL™
attached

These are used as joints in the form of either raised faceflange, tongue and groove flange or male and female
flange for towers, tanks, heat exchangers, autoclaves andvalve bonnets for high temperature & high pressure steam
and in process lines.

VALQUAFOIL™ VF-30

Products with any given dimensions can be
manufactured based on information provided
concerning material, shape and dimensions.
Gaskets of various dimensions made of oxygen
free copper are also available which are to be
used for knife-edged shape flanges (ICF, UFC
flanges, etc.) in use for semiconductor related
facilities and vacuum equipment.

▼ Maximum service temperatures for gasket metallic materials (for reference)
Material

Maximum service
temperature（°C）

Material

Maximum service
temperature（°C）

Lead

100

5Cr-0.5Mo steel

621

Brass

260

SUS 410649

Aluminum

260

Silver649

Copper400

Nickel760

SUS 304

427

Monel metal

816

SUS 316816

SUS 321816

Pure iron, low carbon steel

538

SUS 347

816

Titanium

1,093

Inconel

1,093

Hastelloy

1,093

Remarks:
Since the above maximum service temperatures are based on
air with a certain constant temperature, they vary to a great
extent depending on the type of liquid, pressures and modeof use.

27

28

GAS K ET

Ring Joint Gasket

Metal Hollow O-ring

VALQUA No.550 Series

VALQUA No.3640/3641

These gaskets are made of single metal to be used for pipe flanges in the lines handling high temperature &high pressure steam, as well as for ring joint flanges of valve bonnets.

GASKET

Metal Hollow O-rings are made of thin metal pipe processed into circle or other specified shapes, whose bothends are butt-welded. As they can offer sealing with a relatively low tightening force and also compact gasket
joints can be designed, they are used in various types of equipment for high temperature & high pressure, as
well as high vacuum applications.

▼Types of products▼Types of products
VALQUANo.

Name

550-ZO
SeriesOval crosssection shape

550-ZS
SeriesOctagonal crosssection shape

550-ZA
Series

API-RX crosssection shape

Cross section

VALQUA No.

Name

Cross section

3640

Basic design

3641

Balanced type

■ Available ranges ■550-ZP
SeriesVALQUA No.

temperature

Pressure

3640

Depending on
component metallic
materials＊

High vacuum ~ 7 MPa

3641

API-BX crosssection shape

Vacuum ~ 300 MPa＊ As for maximum service temperatures for component metallic materials, refer
to "Maximum service temperatures for gasket metallic materials (for reference)"on page 27.

■ Applications ■■ Manufacturing ranges ■They are used as gaskets for equipment in various
industries including aerospace equipment, vacuum
equipment, semiconductor-related facilities, nuclear
power -related facilities, electronic devices, agitators,
melt spinning and hydraulic units.

▼Dimensional standards
Dimensions specified in JPI, ASME, API, MSS and the like for ring
joint flanges are our standard.

▼Component metallic materials
Metallic materials include low carbon steel, pure iron, stainlesssteels (304, 304L, 316, 316L, 321, 347, 310S), 5Cr-0.5Mo steel,copper, monel metal, titanium and nickel.

Pipe dia (mm)Max.permissible
dimension ofouter diameter(mm)Pipesymbolpipe thickness (mm)J

0.9×0.15■ Applications ■L

0.9×0.25

Widely used as gaskets for pipe flanges, pressure
vessels, towers, tanks and valve bonnets for handlinghigh temperature & high pressure steam, gas, oil andsolvent used in oil refining, chemical, power andshipbuilding and the like.

G

1.6×0.15

A

1.6×0.25

M

1.6×0.35

B

1.6×0.5H

2.4×0.15

C

2.4×0.25

N

2.4×0.35

D

2.4×0.5○E

3.2×0.25○

O

3.2×0.35

F

3.2×0.5P

3.2×0.8I

4.8×0.5○○

200〜2000K

6.4×0.8○○

400〜2500

×

SUS304 SUS316

SUS321 Incoloy800○▼Component metallic materials
Material
Stainless steel (SUS304)

8〜100

○

Stainless steel (SUS316)
○

○

○

○

Pipe
○

○
○

○

Stainless steel (SUS316L)＊

11〜200Incoloy○

VALFLON™ (PTFE)

○
○

○

○

Plated silver○

25〜350○○○Coating
material

Plated nickel
Plated copper○○

Plated gold○○

＊ Only the pipe diameter φ0.9 is available.

○○

Stainless steel (SUS321)○○

40〜1500○○ Materials in stock
Remarks: In these Metal Hollow O-rings, the inner weld beads made at the time of metal pipe
butt-welding are uniformly finished.

29

30

GAS K ET

VALQUATEX Gasket

Trypack™ (Metal C-ring Gasket with spring)
VALQUA No.3645/ 3645LSGASKET

VALQUA No.N214/ N314

Metal C-rings are made of a coil spring as an elastic element, which is covered with a thin metallic sheet suchas aluminum sheet. Being elastic and rich in recovery and also able to offer sealing at low tightening forces,
they can be used in the fields handling high temperature, ultra high vacuum, as well as in applications subject
to very low temperature and high pressure, where rubber based O-rings can not be adopted.

VALQUATEX is fabric which uses non-asbestos material such as ceramics instead of conventional asbestos.
VALQUATEX Gaskets punched out from VALQUATEX are used for flanges of equipment manhole or exhaustgas ducts.
▼Types of products▼Types of products

No.N214This type of gasket is made from a rubberised
glass fiber fabric finished to the required flat
shape.

No.N314This type of gasket is made from a rubberised
metal wire-reinforced ceramic fiber fabricfinished to the required flat shape.

No. 3645
Double layered
products

Outer cover（aluminum A1050P）
Inner cover（stainless steel SUS304）■ Available ranges ■Coil spring（stainless steel SUS304-WPB）

No. 3645
Single layered
products

VALQUA No.

N214

N314

temperature (°C)

400

800

Temperature and pressure show individual service limit.
Remarks:
Because of insufficient sealing property, these gaskets should be
used in locations where leakage to some extent is permitted.

Outer cover（aluminum A1050P）

Coil spring（stainless steel SUS304-WPB）

No. 3645LS■ Manufacturing ranges ■Low tightening
force type,
double layered
products

s Products with any given shape and dimensions can be
manufactured based on consultation.
sUpon request, products with surface treatment usinggraphite are available. (it facilitates peeling off gaskets
when disassembling joints)

Outer cover（aluminum A1050P）
Inner cover（stainless steel SUS304）

V-shaped
grooveCoil spring（stainless steel SUS304-WPB）
Products with the following component materials are also available.

■ Available ranges ■Outer cover

Stainless steel, nickel, silver, copper, tantalum−270〜250

Inner cover

InconelUltra high vacuum ~ 7

Coil spring

Inconel, nimonic（1）

temperature （°C）
Pressure（MPa）

Temperature and pressure show individual service limit.
Note (1) The temperature ranges are for aluminum, and vary depending on
component material used.

Rubber Sheet▼Compression recovery characteristics of Trypack™
（No.3645）

GASKET

VALQUA No.2010（NBR/CR/EPDM）/ 4010/ 5010

■ Manufacturing ranges ■（1）
Cross sectional diameter（mm）

３００

Inner diameter（mm）

3.8

25〜1500

5.6

150〜2000

Dimensions of test piece
２５０

Tightening force (N/mm)

Note (1) Any given diameters are available, including 1.7, 2.6, 8.0 and 10.0.

■ Applications ■Used for semiconductor-related facilities, nuclear power-related
facilities, electronic industry, laser equipment, joints, valves,injection molding machines, etc.

■ Design data ■Crosssectional
diameter
（mm）

Inner
diameter（mm）

Groovedepth

Silver &copperNickel &tantalum

Stainless steel& titanium

1.7

5〜50

1.4

200

220

250

290

2.6

10〜100

2.1

220

250

340

400

3.8

25〜1500

3.0

250

310

490

590

5.6

150〜2000

4.5

320

390

640

780

8.0

175 and over

7.0

340

490

−

−

10.0

175 and over

9.0

390

590

−

−

0.8

0.4

0.2

0.2

● Outer cover: A1050P● Coil spring: SUS304-WPB● Cross sectional diameter: 3.8 mm● Inner diameter: 71 mm

S

２００

31

Available ranges

VALQUA
No.

2010

Rubber material

temperature (°C) Pressure（MPa）

Chloroprene rubber（CR） −30〜120
Ethylene propylene rubber（EPDM） −40〜150

１５０

１００

4010

Fluoro rubber（FKM） −15〜200

5010

Silicone rubber（VMQ） −60〜200

0.5Remarks: The above temperatures should be used as a measure.

S0■ Manufacturing ranges ■
S1

０

０.２

０.４

０.６

０.８

１.０

１.２

Thickness（mm）

1.0、1.5、2.0、3.0、4.0、5.0

Size（mm）

Maximum diameter 1000

Compression amount (mm)Permissible leakage … He 1 x 10-11 Pa·m3/s
Air sealing initiating point … S0 78.4N/mm● Air sealing limiting point … S1 44.1N/mm● Recovery amount … 0.2 mm●

Flange surface roughness（Ra）■ Available ranges ■Nitrile rubber（NBR） −30〜120

５０Required tightening force（N/mm）（mm） Aluminum

These gaskets are made by punching synthetic rubber
sheets of various materials, and are used for low
pressure applications where adequate tightening force
is not available.

Single layered products

Upon placing order●※S0 is the point where leakage becomes below the permissible amount,
while S1 is the limit where leakage is maintained below the permissibleamount.

Sheet or punched gaskets can be
manufactured based on information provided
concerning material, shape and dimensions.
32GlandPacking

Table Indicating Non-Asbestos Gland Packing(applications & performance)

Classification

Application
VALQUA
mfg No.

Valve

Color
tone

Page

Black

39

Black

39

◎ : Recommended products○ : Combination
recommended products☆ : For adapter packing only1）

No.8133

2）

No.6232 No.7233（°C） （MPa） （°C） （MPa） （m/s） （°C） （MPa） （m/s） （°C） （MPa） （m/s）

5650Temperature limit（°C）

260

260

260

300

260

260

4）

650
4）

〈400 〉 〈400 〉

650
350

350

650

4）

4）

〈400 〉 〈400 〉

15

200

4.9

5

Grey

39

Pressure limit（MPa）

10.3

10.3

10.3

10.3

15.5

25.9

25.9

43.1

15.5

25.9

25.9

43.1

No.6262

260

1.6

20

260

4.9

5

Black

39

pH

2〜3

0〜14

0〜14

0〜14

2〜13

0〜14

0〜14

0〜14

0〜14

5〜9

0〜14

0〜14

Black

39

Black

39

Black

40

No.6399

300

25.9

600

2.0

600

20

25.9

300

43.1

300

1）

14.7

5

24.5

5

39.2

300

600

1）

14.7

5

5

Black

25.9

260

40

Black

40

No.7202E

260

1.6

16

260

4.9

5

260

4.9

5

Black

40

No.7202W

260

1.6

16

260

4.9

5

260

4.9

5

White

41

No.7202

260

5.1

260

1.6

20

260

4.9

5

260

4.9

5

Black

40

No.7203

260

10.3

260

2.0

20

260

9.8

5

260

9.8

5

Black

41

No.7232

260

5.1

260

1.6

5

260

4.9

1

260

4.9

1

White

41

No.7233

260

10.3

White

41

No.7262

260

1.6

5

No.8132

260

1.0

10

No.8133260

10.3

No.8133L

260

10.3

No.8137

260

15.5

120

0.8

8

No.8201

260

10.3

260

2.0

No.8201（NL）

260

10.3

260

2.0

No.VF-10

No.VF-20LF
No.VFC-25

42

White

42

260

14.7

1

260

14.7

1

White

42

16

260

14.7

5

260

14.7

5

Brown

42

8

260

14.7

1

260

14.7

1

Brown

42

150

Fresh water, seawater,heated water
Superheated steam,
Saturated steam
Animal & vegetable oil,mineral oil, heavy fuel oil
Heat transfer oil(except HTS)

◎

◎

◎

○

☆

☆

☆

◎

◎

◎

○

☆

☆

☆

◎

◎

◎

○

☆

☆

☆

☆

☆

☆

○

○

○

○

Alcohol based solvent

◎

◎

◎

○

☆

☆

Aromatic based solvent

◎

◎

◎

○

☆

☆

Ketone & ester

◎

◎

◎

○

☆

☆

◎

◎

○

☆

☆

○

☆

☆

○

☆

☆

○

☆

☆

Weak acid & alkali

Nonflammable gas &inflammable gas◎

Strong acid(except oxidizing acid)
Oxidizing acid &oxidizing agent 3）
Strong alkali

◎

◎

◎

◎
◎

◎

◎

◎

Black

43

Remarks : This selection table lists up products recommended by us for various conditions, and does not necessarily mean that non-marked items can not be
used. It should also be noted in advance that, depending on the service conditions, abrasion powder may be mixed into the working fluid.

Black

44

Black

43

25.9

Black

43

Notes 1) For gas based fluid, 8133L should be used.
2) For gas based fluid, 7233 (O), 7233 (SO) should be used, while for gas susceptible to burn, 7233 (FO).
3) 7233 is the only one applicable to oxidizing acid.
4) Temperature limit in air.
5) In case of combining with VF-10, VF-20, VF-20L, VF-20LF.

Grey

44

Grey

44

Black

44

25.9

Black

44

350

25.9

Grey

44

350

25.9

Grey

42

650

1）

43.1

1）

350

10.3

Major application

White

Class

43.1

650

3）

Metal
based No.1110

42

300

43

10.3

No.VC-26

White

Class

5）

Black

1）

300

3）

1

600

5）

43.1

650

No.VFT-22

No.VC-25

4.9

Class

5）

43

650

3）

260

900

Black

No.VF-25L

No.VC-23

41

Class

43.1

1）

600

3）

White

Class 1500

431）No.VF-22

No.VC-22

1

5）

Black

650

No.VF-20L

2）

1

4.9

Class 2500

43.1

650

No.VF-20

1）

4.9

260

260

Oil
Water
based fluid based fluid

600

1）

Solvent

No.6345

1）

Corrosive fluid

15.5

350

Correspondence to ANSI rating Class

1.0

Gas based fluid

Carbon fiber based
VALFLON™ based

9.8

260

5

200

No.6399L

Special fiber based

4.9

200

No.VF-10
No.VF-20
No.VFT-22 No.8137 No.6399L No.VF-25L No.VF-20 L No.6267 N0.1110 No.6345 No.VFC-25
No.VF-20 LF

No.6234

No.6399H

Graphite based

20

10.3

260

No.6267

General use
graphite based

1.0

200

No.6232

Non-Asbestos Gland Packing

Rotating machine

Temperature Pressure Temperature Pressure Speed Temperature Pressure Speed Temperature Pressure Speed

No.6201

33

VALQUA No.

Reciprocating
motion machine

Rotary pump

Gland
Packing

Table for Selection of Non-Asbestos
Gland Packing for Valve Stems

650

2.5

1.0

300
600

1）

1）

1）

350

Available range

1.0

2.0

25

600

1）

14.7

5

600

1）

14.7

5

8
10

20

600

350

24.5

5

350

1）

4.9

24.5

1

5

Note 1) Heat resisting temperatures depend on the fluid used.
Note 2) In case of lubricated products.
Note 3) Economical products.

Gas susceptible to burn
Liquefied gas

◎
○

☆

☆

WARNING : Properties / applications shown throughout this brochure are typical. Your specific application shoud not be undertaken without independent
study and evaluation for suitability. For specific application recommendations consult Valqua. Failure to select the proper sealing products could
result in property damage and / or serious personal injury. Performance date published in this brochure has been developed from field testing,customer field reports and /or in-house testing. While the utmost care has been used in compling this brochure, we assume no resposibility forerrors. Specifications subject to change without notice. This edition cancels all previous issues. Subject to change without notice.

34

Fluid-wise Application Sheet for Non-Asbestos
Gland Packing for Valve Stems

No.VFC-25

No.VF-20

①

②
25.9

15.5
10.3
5.17

Inflammable gas
Methane & ethane
PropaneAcetylene
Hydrogen, etc.

class 1500

No.6399L②

class 900
class 600

0-200 -100③③

class 300

No.VF-20

0

100

200

300

400

500

600

700

800

900 1000

43.1 class 2500

No.VFC-25

No.VF-20

①

②

15.5
10.3

No.VFC-25

class 1500

No.VF-20L②

class 900②

class 600

No.6267

No.VF-20L③

class 300

0-200 -100

15.5
10.3
5.17

②

class 900

No.6399L

Gas susceptible
to burn.
Oxygen & ozone,
etc.

25.9

③
0

100

200

300

400

500

600

700

800

900 1000

No.6232 or No.8133L

15.5
10.3
5.17

class 1500

0

100

200

300

400

500

600

700

800

900 1000

Fluid temperature（°C）

No.VF-20

Note 1) Lubricant treated 7233 (FO)Remarks: Be sure to use PTFE spacer ringat the same time.

③③

class 300

class 2500

43.1
0

100

200

300

400

500

600

700

800

900 1000①

No.VFT-22①

5.17

class 600②②

class 300

0

100

200

300

400

500

600

700

800

900 1000

10.3
5.17

No.VF-20
No. 1110 or No. VFC-25

class 900
class 600

Organic acidAcetic acid & lactic
acid, etc.

class 300

0

100

200

300

400

500

600

700

800

900 1000(In the air, 400°C)
No.VFC-25

No.VF-20

②

10.3
5.17

class 1500

No.6267

class 900
class 600③

class 300

0-200 -100

No.VF-20

③

②
①

0

100

200

300

400

500

600

700

800

900 1000

Corrosive fluid

AlkalisSodium hydroxide,etc.

43.1 class 2500

15.5

No.VF-20

No.VFC-25

No.VF-20

No.6267

No.VF-20①

43.1 class 2500

①

25.9

No.1110class 1500

Fluid temperature（°C）

Remarks: The above rating figure is prepared on the basis of the upper limit for butt-welded valves according to ANSI B16.34 Special class.
＊Actual selection may be different from the above exmple,due to consideration of past results, intergration and discountinuation of the product.

25.9

15.5
10.3
5.17

②

class 1500

class 900
class 600③

class 300

0-200 -100

③

②
①

0

100

200

300

400

500

600

700

800

900 1000

Fluid temperature（°C）

Strong acidSulfuric acid& nitric acid
Hydrochloric acid& phosphoric acid
Chromic acid
Corrosive gas

No.7233 or No.8133(In the air, 400°C)

Pressure（MPa）

15.5

No.VF-20class 900

15.5
10.3

No.VFC-25

class 1500

25.9

Fluid temperature（°C）
25.9No.7010(PTFE spacer ring)class 300

0-200 -100

Pressure（MPa）

No.7233

class 600

class 600

0-200 -100

Pressure（MPa）

1）

class 900

0-200 -100

Pressure（MPa）

25.9

class 1500

Fluid temperature（°C）

Solvent based fluid

25.9

5.17

Pressure（MPa）①

0-200 -10035①

43.1 class 2500

43.1 class 2500

Alcohols
Ketones
EthersAmines(In the air,
400°C)

No.VFT-22

Fluid temperature（°C）

Liquefied gas
LPG & LNG,
liquefied nitrogen,etc.

Aromatichydrocarbon,
B.T.X. etc.

①

Fluid temperature（°C）

Fluid temperature（°C）

Heat transfer oil(except HTS
such as sodium
nitrate)Example of combination

43.1 class 2500

圧力 （MPa）(In the air,
400°C)

43.1 class 2500

Oil based fluid

General mineral oil
Gasoline
Diesel oil
Naphtha
Heavy oil
Kerosene
Tar
Crude oil
Fuel oilOil gasAnimal & vegetable oil

Nonflammable gas
Carbon dioxide
Nitrogen & air
Argon, etc.

Rating: ANSI

Chlorine & bromine
Iodine & hydrogensulfideSulfur dioxide, etc.

No.723343.1 class 2500

Pressure（MPa）

Neutral salt solution
Sodium chloride
Sodium nitrate
Sodium sulfide,...etc.

Applicable fluid

Example of combination①

Pressure（MPa）

Fresh water
SeawaterIndustrial water
Hot water
Boiler feed water
SlurrySaturated steam
Superheated steam
Drain

Rating: ANSI

Pressure（MPa）

Water based fluid

Applicable fluidGas based fluid

Gland
Packing

25.9

15.5
10.3
5.17

class 1500

class 900

1）No.7233

class 600
class 300

0-200 -100

0

100

200

300

400

500

600

700

Fluid temperature（°C）

800

900 1000

Note 1) Lubricant treated 7233 (O)＊Actual selection may be different from the above exmple,due to consideration of past results, intergration and discountinuation of the product.

36

GlandPacking

Table for Selection of Non-Asbestos
Gland Packing for Rotary Pump Shafts

VALQUA No.
◎ : Recommended products☆ : For adapter packing only

VALQUA No.
◎ : Recommended products☆ : For adapter packing only

No.7232 No.6234 No.8132 No.6262 No.7202E No.7202W No.7202

No.8201
No.7203 No.8201 No.6232 No.8137 No.VF-22 No.6399 No.6345 No.6399H No.1110
（NL）

350

Temperature limit（°C）

260

260

260

260

260

260

260

260

260

260

260

No.7262 No.8132 No.6234 No.7202E No.7202W No.7202 No.6262 No.8201 No.7203 No.VF-22 No.6345 No.1110
650

650

650
650
260 〈4001）〉 300 〈4001）〉 300

260

200

260

260

260

260

260

260

Pressure limit（MPa）

1.6

1.0

1.0

1.6

1.6

1.6

1.6

2.0

2.0

2.5

2.0

2.0

Pressure limit（MPa）

4.9

4.9

4.9

4.9

4.9

4.9

4.9

9.8

9.8

9.8

9.8 14.7 14.7 24.5 14.7 39.2 24.5

Speed limit（m/s）

5

10

15

16

16

20

20

16

20

20

20

20

Speed limit（m/s）

1

5

1

5

5

5

5

1

5

5

5

Permissible PV value（MPa・m/s）

4.9

6.4

11.7

12.3

12.3

12.3

14.7

14.7

14.7

24.5

14.7

19.6

pH

0〜14 2〜12 2〜13 0〜14 0〜14 0〜14 0〜14 2〜13 2〜13 2〜13 0〜14 2〜13 0〜14 0〜14 0〜14 0〜14 5〜9

Attack to shaft

Excellent Excellent Excellent Good Excellent Excellent Excellent Fair

Good

Fair

◎

◎

◎

Good

Excellent Excellent

◎
◎

◎

◎
◎

◎

Mineral oil, animal &vegetable oil

◎

◎

◎

◎

◎

◎

◎

☆
◎

☆

◎
◎

Heat transfer oil◎

Crude oil & heavy fuel oil

☆

◎

◎

◎

◎

◎

☆

Aromatic hydrocarbon

◎

◎

◎

◎

☆

Ketones & ethers

◎

◎

◎

◎

☆

◎

Alcohol based solvent

Strong alkali

◎

◎
◎

◎

Note 1) Temperature limit in the air

◎

◎

◎

☆

◎
◎

◎

◎
◎

Pulp liquid
Refrigerants(chlorofluorocarbons)
low temperatureliquefied fluid

☆

◎

◎
◎

☆
☆

◎

◎

◎

◎

◎

☆

☆

◎

◎

◎

◎

☆

☆

◎

◎

◎

◎

◎

◎

Screw feeder
Dryer

◎

◎

◎

◎

◎

Gear pump, ...etc◎

Clean water, seawater

Mineral oil, animal &vegetable oil

Polymer◎Air, gas◎◎

Solvent vapor, etc.

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

◎

Fine particle
Slurry liquid

◎
◎

◎

◎

◎

◎

◎

◎

◎

5

◎

◎

☆

☆

☆

◎

◎

☆

☆

☆

◎

◎

☆

☆

☆

◎

☆

☆

◎

◎

☆

☆

◎

☆

◎

◎

☆

◎

◎

◎

☆

☆

◎

◎

◎

☆

☆

◎

◎

☆

☆

☆

☆

☆

☆

◎
◎

☆

◎

◎

◎

☆

◎

◎

◎

☆

◎

◎

◎

☆

◎

☆

☆

◎
◎

☆
☆

◎

◎

☆

☆

◎
◎

5

◎

Heat transfer oil
Crude oil & heavy fuel oil

5

Fair

◎
◎

5

Fair

◎

Sewage water,
muddy water
Heated water,
boiler feed water,
low pressure steam

◎

◎
◎

◎

◎

5

350

Good Excellent Excellent Good Good◎

Expansion joint
Agitator

1◎

Soot blower

Water based fluid

Heated water,
boiler feed water,
low pressure steam◎☆

Plunger pump

Fine particle etc. Oil based fluid◎

Slurry liquid, muddy water

Strong acid(except oxidizing acid)
Oxidizing acid &oxidizing agent

Fair

Rotating motion

Fair

Gas ingeneral

Water based fluid
Oil based fluid

Solvent

Excellent Excellent Excellent Excellent Excellent Excellent Excellent

Clean water,
refreshing beverage
Fresh water, seawater,
sewage water

Weak acid & alkali

Corrosive fluid

1）

0〜14 2〜13 2〜12 0〜14 0〜14 0〜14 0〜14 2〜13 2〜13 0〜14 0〜14 2〜13

Attack to shaft

Others1）〈400 〉 〈400 〉

Reciprocating
motion260

Application classification

Temperature limit（°C）

pH

37

Gland
Packing

Table for Selection of Non-Asbestos
Gland Packing for Equipment

◎

☆

☆

Note 1) Temperature limit in the air

38

GlandPacking

Constructions and Features■ Carbon fiber based ■For plunger pumps

For water & oil pumps

VALQUA No.

VALQUA No.

6201

6399

Coil packing made of carbonized fabric yarn,processed with PTFE dispersion and lubricating oil,then braided into a square cross section andfinished with PTFE, fine graphite and lubricating oil.
sServiceable for relatively versatile fluids.
sPermissible PV value and shaft speed limit areallowed.
sShaft wear due to packing is reduced.

For plunger pumps

For general use valves & reciprocating motion machines
VALQUA No.
▲ No.6201

6232

Coil packing made of carbon fiber yarns, processedwith PTFE dispersion and lubricating oil, thenbraided into a square cross section and finished with
PTFE, fine graphite and lubricating oil.
sGood compatibility with shafts offers excellent
sealing property even at low tightening pressures.
sSuitable for almost all fluids excepting for strongoxidizing fluids.

VALQUA No.
▲ No.6399

For water & oil pumps, and rotating machines
VALQUA No.

6234∗Patented
product▲ No.6232

Coil packing made of carbonized fabric yarnprocessed with PTFE dispersion and covered withPTFE film, braided into a square cross section, thenits surface finished with PTFE dispersion, inorganic
filler and lubricating oil.
sHandleability is greatly improved, while hard toburn up.
sPTFE film prevents generation of abrasion powderof carbon fiber.
sServiceable for relatively versatile fluids.

Coil packing made of high strength carbon fiberyarns, processed with PTFE dispersion, thenbraided into a square cross section and finished withPTFE and fine graphite.
sWith high fiber strength as well as excellent
durability and elasticity, these are suited for shaft
seals of reciprocating motion machines forhandling water & oil based fluids, and solvent
vapors.

6399HEndless packing similar to No.6399, but molded
tight into specified dimensions.
sThese are suited for shaft seals of high pressure
reciprocating motion machines for handling water& oil based fluids, and solvent vapors.
sThese are normally used in combination withcarbon bushes, No.6399 and No.8201.
sThese can also be used as adapter packing forvalve shaft seals.

For control valves
VALQUA No.

6399LCoil packing made of high strength carbon fiberyarns, processed with PTFE dispersion, thenbraided into a square cross section and finished withPTFE and lubricating oil.
sThese can be directly used as adapter packing forcontrol valve shaft seals.
sFor control valves with Class 1500 or below, thesecan be used alone.

▲ No.6399H

For chemical pumps
VALQUA No.

6262

Coil packing made of carbon fiber yarns, processedwith PTFE dispersion and lubricating oil, thenbraided into a square cross section and finished with
PTFE, fine graphite and lubricating oil.
sPermissible PV value and shaft speed limit areallowed.
sShaft wear due to packing is reduced.
sSuitable for almost all fluids excepting for strongoxidizing fluids.

■ VALFLON™ based ■For high shaft speed pumps and rotary equipment for handling versatile chemical fluids
VALQUA No.

7202

For high temperature & high pressure valves for treating water & oil based fluids
VALQUA No.
▲ No.6234

6267

Coil packing made of carbon fiber yarns, processedwith graphite, then braided into a square crosssection and finished with graphite.
sPacking exclusive for adapters, to be used in
combination with graphite packing.
sSuitable for valve shaft seals for handling water &oil based fluids, nonflammable and inflammablegases as well as liquefied gas.

▲ No.7202

For high shaft speed pumps and rotary equipment for handling versatile chemical fluids

For seals of exhaust heat duct joints, dampers and dryer doors
VALQUA No.

6345

39

Coil packing made of high grade carbon fiber yarns,
processed with graphite, then braided into a squarecross section and finished with graphite.
sInexpensive Non-Asbestos product used for sealsof dampers and dryer doors.
sComposed of carbon fiber and graphite, thesehave a high fiber strength and are excellent inelasticity and heat resistance.
sThe amount of organic materials used being
reduced, there is little smoke released at the timeof heating.

Coil packing made of PTFE yarn, integrated withgraphite and lubricating oil, then braided tight into asquare cross section.
sWith a construction considering elasticity andwear resistance, these are suited for largediameter machines and for locations subject tohigh load.
sWith excellent heat conductivity and chemicals
resistance, these are best suited for high shaft
speed rotating shafts for handling water & oil aswell as chemical fluids.
sShaft wear due to packing is negligible.
sProducts with a dimension 6.5 mm or larger areavailable.

VALQUA No.

7202E

Coil packing made of PTFE fiber including graphite
and lubricating oil, braided tight into a square crosssection.
sWith excellent heat conductivity and chemicals
resistance, these are best suited for high shaft
speed rotating shafts for handling water & oil aswell as chemical fluids.
sShaft wear due to packing is negligible.

▲ No.7202E

40

GlandPacking

Constructions and Features■ Special fiber based ■For high shaft speed pumps and rotary equipment for handling versatile chemical fluids
VALQUA No.

7202W

Coil packing made of PTFE fiber including white filler andlubricating oil, braided tight into a square cross section.
sThese are excellent in thermal expansion resistance,heat conductivity, and chemicals resistance.
sShaft wear due to packing is negligible.
sThese can be used for higher peripheral speed
applications than 100% PTFE gland packing.
sThese comply with the Food Sanitation Law, and theRegulations concerning Food & Additives.

For low & medium shaft speed pumps and rotary equipment
VALQUA No.

8132

For rotating shafts of agitators and the like
▲ No.7202W

VALQUA No.

7203

Coil packing made of PTFE fiber yarns integrated withgraphite and lubricating oil and of aramid fiber yarns,
processed with PTFE and lubricating oil so as to form thecorner section made of aramid fiber, then braided tightinto a square cross section.
sThis is a high performance hybrid packing that isfeatured with the strength of aramid fiber and with the
lubrication property of graphite-integrated PTFE fiberyarn.
sHaving characteristics similar to those of No.7202, butthese No.7203 are best suited for shaft seals in use forrotating machines and reciprocating machines subject
to still higher pressure and load.
sProducts with a dimension □ 6.5mm or larger areavailable.

▲ No.8132

Coil packing made of blended yarn of aramid fiber and of
artificial inorganic fiber treated with PTFE dispersion,
braided into a square cross section, then finished soft withPTFE dispersion and lubricating oil.
sThese are flexible and compatible with shafts.
sBeing white in color, these can be used for fluid
applications where black color should be avoided.
sThese are best suited as a Non-Asbestos alternative forNo.7132.
sThese can be used as shaft seals of pumps for handlingwater based and oil based fluids as well as weak acidand weak alkaline fluids. These are further used as shaft
seals of rotating machines such as mixers and agitators
where contamination is not desirable.

For general use valves
VALQUA No.

8133

Coil packing made of blended yarn of aramid fiber and of
artificial inorganic fiber treated with inorganic filler, braided
into a square cross section, then finished with PTFE
dispersion.
sThese are white clean packing without using lubricatingoil.
sThese can be used as shaft seals of general use valve
for handling water based and oil based fluids.

For general use valves▲ No.7203▲ No.8137

For corrosive fluids
VALQUA No.
Coil packing made of PTFE fiber yarns, processed withPTFE dispersion, then braided into a square cross section.
sBeing made of 100% PTFE, these are resisting toalmost all fluids.
sThus, these are best suited for shaft seals of rotatingmachines such as agitators handling corrosive fluids.
Depending on service conditions, they may also be
applied as shaft seals for valves and reciprocating
motion machines.
sNo.7232 (SO) should be used when low torque or gas
sealing property is required.
sThese comply with the Food Sanitation Law, and theRegulations concerning Food & Additives.

VALQUA No.

8133L

7232

For general applications
VALQUA No.

8137▲ No.8201▲ No.7232

For corrosive fluid valves
VALQUA No.

7233▲ No.7262

Coil packing made of PTFE fiber yarns, processed withPTFE dispersion, then braided into a square cross section.
sBeing made of 100% PTFE, these are resisting toalmost all fluids.
sThus, these are best suited for chemical use valve shaft
seals for handling corrosive fluids.
sWhen low torque or gas sealing property is required, use
the following products which are treated with lubricatingoil:
No.7233 (O) for general gas based fluids
No.7233 (SO) for low temperature use of inflammablegas and liquefied gas
No.7233 (FO) for gas susceptible to burn such as
oxygen and ozone.
sThese comply with the Food Sanitation Law, and theRegulations concerning Food & Additives.

VALQUA No.

8201■ Metal based ■

7262
41

Coil packing made of PTFE fiber yarns, processed withPTFE dispersion and lubricating oil, then braided into asquare cross section.
sFlexible and compatible with shafts, these are excellent
in sealing property.
sBeing highly excellent in chemicals resistance, these are
best suited for pumps handling corrosive fluids.

VALQUA No.

1110

Coil packing made of aramid fiber yarns treated with PTFE
dispersion and lubricating oil, then braided into a squarecross section.
sWith excellent wear resistance and unparallel durability,
No.8201 packing has come one step closer to a
maintenance free product.
sThese exhibit an excellent performance as rotating shaft
seals for handling slurry and high viscosity fluids.

▲ No.1110

For low speed rotating shafts and reciprocating motion machines
VALQUA No.

VALQUA No.

Coil packing made of blended yarn of aramid fiber and of
artificial inorganic fiber treated with PTFE dispersion,
braided into a square cross section, then finished withPTFE dispersion.
sThese are white clean packing without using lubricatingoil.
sThese are excellent in cost per performance.
sThese can be widely used for general use valves as well
as for shaft seals of agitators and plunger pumps.

For pumps and rotating & reciprocating motion machines

For high temperature & high pressure valves
For low & medium shaft speed pumps and rotary equipment for handling corrosive fluids

Coil packing made of blended yarn of aramid fiber and of
artificial inorganic fiber treated with inorganic filler, braided
into a square cross section, then finished with PTFE
dispersion and lubricating oil.
sWith low shaft resistance and excellent sealing property,
these are best suited for valves.
sWith characteristics nearly similar to those of No.8133,
these are best suited in particular as general use valve
shaft seals for handling gas based fluids.

Spiral type packing made ofaluminum ribbon treated withgraphite and lubricating oil, thenformed into a square crosssection.
sThese are suitable for adapter
packing to prevent extrusionsof soft packing.

8201
(NL)

Coil packing made of aramid fiber yarns treated with PTFE
dispersion, then braided into a square cross section.
sWith excellent wear resistance and unparallel durability,
No.8201 (NL) packing has come one step closer to a
maintenance free product.
sThese exhibit an excellent performance as low speed
rotating shaft seals for handling slurry and high viscosity
fluids.
sFree from lubricating oil, these can be used for locations
where contamination due to oil should be avoided.

42

GlandPacking

Constructions and Features■ Flexible graphite based ■For general use valves

For high temperature & high pressure valves

VALQUA No.

VALQUA No.

VF-10▲ No.VF-20

VFT-22∗Patented
product

Coil packing made of expanded graphite
yarn clad with PTFE film, and braided into asquare cross section, that is, gland packing
that makes use of the features of eachmaterial.
sExpanded graphite being the major
material, these are excellent in sealing
property and durability.
sThe surface being clad with PTFE, stem
friction is low.

VALQUA No.

VFC-25∗Patented

product

Coil packing made of yarn integrated withexpanded graphite, carbon fiber and Inconel,
braided into a square cross section, thenprocessed on its surface with uniquetreatment.
sBeing free from exposed metal wire, theseshow low abrasion on the stem.
sThese are excellent in sliding performance.
sThese are exclusively used as adapter
packing.
sOnly molded products are available.

For high temperature & high pressure valves
VALQUA No.

VF-20▲ No.VFC-25

Packing made of soft and highly elastic graphite,
exhibiting excellent chemicals resistance and favorable
sealing property.
sThese can withstand continuous service under widely
changing temperature ranges and provide adequate
sealing property even with a low tightening force.
sIn combination with adapter packing, these areapplicable to various types of fluids including water
based, oil based, chemical based and gas based fluids.

For general use valves

Coil packing made of expanded graphite yarn reinforced
with Inconel wire and braided into a square cross section.
sBeing highly excellent in heat resistance, chemicals
resistance and radiation resistance, as well as having
favorable sealing property and maintenance freeness,these are applied in various industrial fields.
sThese are used as valve shaft seals for water, steam, oil,acid, alkali, heat transfer oil, solvent and gases(excluding oxygen, oxidizing agent, strong oxidizingacid).
sThese are normally used in combination with adapter
packing such as No.6399L and VFC-25.

For high temperature & high pressure valves
VALQUA No.

VF-20L

No.VF-20, but treated with lubricating oil.
sAlthough characteristics being almost similar to those of
No.VF-20, these have reduced shaft friction andimproved sealing property.

■ Flexible graphite based general use grade ■General use grade products made of expanded graphite are clearly different from normal Non-Asbestos
products in the sense that these are offered at reasonable prices, while the product performance ismaintained comparable to that of conventional asbestos based products.
These are best suited for utility lines and the like, where conventional asbestos based general use products
have been adopted, and where high sealing performance is not required. On the other hand, because of theinherent characteristics of the products, these are not recommendable for critical safety related equipment
such as in the process lines and the like.
For general use valves and pumps
VALQUA No.

VC-22

Coil packing made of expanded graphite
yarn braided into a square cross section,then processed with PTFE dispersion.
sThese are alternatives for asbestos based
general use products used as shaft sealsof pumps and valves for handling water,
oil and solvent.

For pumps and rotating machines
VALQUA No.

VC-23

Coil packing made of expanded graphite
yarn reinforced with carbon fiber, braided
into a square cross section, then processedwith graphite and lubricating oil.
sThese are alternatives for asbestos based
general use products used as shaft sealsof pumps, rotating machines and valves
for handling water, oil and solvent.

For high temperature & high pressure valves
VALQUA No.

VF-20LF∗Patented
product

No.VF-20, but with unique surface treatment.
sAlmost free from lubricating oil, these have a reduced
amount of heat loss under high temperature conditions,and exhibit stable low friction for a long period of time.

For high speed rotation and reciprocating motion machines▲ No.VFT-22

VALQUA No.

VF-22

Coil packing made of expanded graphite yarn and braided
into a square cross section.
sBeing free from metal wires as a reinforcing material,
these are best suited as sealing material of sliding
sections of high speed rotating machines.
sThese are excellent in heat resistance, chemicals
resistance and radiation resistance.
sFor application in reciprocating motion machines, these
are used in combination with adapter packing such as
No.1110.

For high temperature & high pressure valves
VALQUA No.

VF-25L43

Coil packing made of expanded graphite yarn reinforced
with Inconel wire and braided into a square cross section,
again clad with Inconel wire on its surface to increase
strength, then further treated with lubricating agent.
sNo.VF-25L can be used alone as a single unit.
sThese are suitable for fluids such as water, steam, oil,acid, alkali, heat transfer oil, solvent and gases(excluding oxygen, oxidizing agent, strong oxidizingacid).

For high temperature & high pressure valves
VALQUA No.

VC-25

Coil packing made of expanded graphite
yarn clad with metal wire, braided into asquare cross section, then processed withgraphite and lubricating oil.
sThese are alternatives for asbestos based
general use products used as shaft sealsof valves for handling water, oil andsolvent.

For high pressure valves
VALQUA No.

VC-26

Coil packing made of expanded graphite
yarn clad with metal wire, braided into asquare cross section, then processed withPTFE dispersion.
sThese are alternatives for asbestos based
general use products used as shaft sealsof valves for handling water, oil andsolvent.

Gland Packing for Nuclear Power Use
VALQUA No.6399LAE(carbon fiber based control valve packing for nuclear power use)

VALQUA No.VF-10AE(VALQUAFOIL™ for nuclear power use)

VALQUA No.VF-20LAE(VF braid for nuclear power use)

VALQUA No.VFC-25AE

A large number of gland packing is used in nuclear powerindustries.
In our Gland Packing for nuclear power use, concentrations ofcomponents such as halogen ions, sulfur and fusible metalalloys are strictly controlled, while their materials are carefully
selected to avoid radiation deterioration.
And this Gland Packing is manufactured under the special
target quality and the severe quality assurance system.
Upon placing order of the Gland Packing for nuclear poweruse, separate consultation is needed.

(VF braid adapter packing for nuclear power use)
Service conditions (within the conditions prevailing in ABWR, APWR)
Service temperature limit: 363°C
Service pressure limit: 18.9 MPa

44

GlandPacking

Manufacturing Ranges and Design Data

Design Data and Reference Materials■ Manufacturing Ranges ■Nominal dimensions

No.6201
No.6232
No.6234
No.6262
No.6267
No.6345
No.6399
No.6399L
No.7202E
No.7202W
No.7202No.7203
No.7232
No.7233
No.7262
No.8132
No.8133
No.8137
No.8133L
No.8201
No.8201NL
No.VF-10
No.VF-20
No.VF-20L
No.VF-20LF
No.VF-22
No.VF-25
No.VF-25L
No.VF-25LF
No.VFC-25
No.VFT-22
No.VC-22
No.VC-23
No.VC-25
No.VC-26
No.1110

3
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4
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5
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(1)

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■ Fluid pressure and number of rings ■
6
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6.5
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8
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9.5
10
11
12.5 14.5
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Only molded products are available.
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16
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19
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Remarks 1 ) ○ : 3 m/box, ● : 3.65 m/box, △ : 60 m/box, □ : 30 m/box, ■ : 10 m/box2 ) No.6399H is available only in the form of ring products.
3 ) No.6345 is available only in the form of coils.
4 ) No.VC-22, VC-23, VC-25 and VC-26 are available only in the form of coils.
Note (1) Because of manufacturing reasons, rectangular products with a cross section of 3 mm x 5 mm are available.

■ Relationship between shaft diameter, stuffing box inner diameter and packing width ■S

Packing width S mm

Packing width S for shaft diameter (d1)φd2

The number of rings of packing to be used is determined on the basis of pressure of fluid to be handled. The number of rings
presented here indicates as a measure the length of packing to be applied, on condition that a proper packing width has been
selected. It should also be noted that, as the number of rings varies depending on the packing material selected and fluid conditions(type, temperature, peripheral speed), as well as environmental conditions, the figures shown here should be treated as reference
information.
▼ In case of valve stem seal

▼ In case of rotary pump shaft seal

ANSI Class

Liquid pressure (MPa)No. of rings

Liquid pressure (MPa)No. of rings

150

2.0 or below

4

Above 0.1 to 0.5

3〜5

300

Above 2.0 to 5.16（5）Above 0.5 to 1.0

4〜6

600

Above 5.1 to 10.3

7（5）Above 1.0 to 2.0

5〜8

Above 2.0

6〜9

900

Above 10.3 to 15.5

8（6）

1500

Above 15.5 to 25.9

10（6）

2500

Above 25.9 to 43.1

12（7）Remarks: The figures in ( ) show the number of rings when combined with
No.VF-20 and VF-20L. The number of rings in ( ) minus "2", the number of ringsof the adapter packing is equal to the number of rings of No.VF-20 and VF-20L.

■ Standard tightening stress of valve stem gland packing ■The standard tightening stressshown here as a measure are thevalues to satisfy the ANSI
hydraulic pressure test.

▼ Necessary tightening stress of gland packing for Non-Asbestos valve stems
Major
application
General use

φd1

2√d1

25

1.6√d122
19

1.25√d1

√d1

16
14.5
12.5
11
10
9.5

1500

2500

For high temperature& high pressure use

6345＋VF-20

24.5

39.2

VFC-25＋VF-20

24.5

39.2

6339L＋VF-20L

19.6

34.3

VFC-25＋VF-20LF

19.6

34.3

58.8
39.2

■ Utility of spacer rings ■■ Recommendation of molded rings ■Spacer rings have the advantages of preventing the
extrusion of packing and also of effectively avoiding theoccurrence of permeation leakage and back leakage. For
the purpose of preventing the extrusion of packing,spacers are usually inserted on both sides of packing,while for avoiding the permeation leakage, they are
inserted between pieces of packing.
Also in the case of using spacer rings to prevent
permeation leakage when two or more types of packing are
combined, it is effective to insert spacer rings between
them.
Major materials for these spacer rings include PTFE, PVDF
as an elementary substance, filled PTFE, and joint sheet.
Spacer rings having thicknesses of 1 to 3 mm are normally
adopted.

Molded rings not only contribute to the reduction of timerequired for assembling, but also play a critical role inmaintaining favorable sealing property. When coil typepacking is used as it is, tightening force is hard to beconveyed to the depth. As a consequence, a substantial
difference will arise between the gland follower side andthe bottom side of the stuffing box, which may causestress relaxation, resulting in a cause of leakage.
Particularly, in the case of a pump where tightening force isrelatively small compared to the valve, the back face ofpacking can not be well accustomed to the stuffing box,
leading to back leakage.
It is thus recommended to adopt molded rings to make fulladvantage of packing performance.

Back leakage

Extrusion

Permeation leakage

3

9 10 11 12 14 16 18 20 22 25 28 32 36 40 45 50 56 63 70 80 90 100 110 125 140 160180200 220 250

900

24.5
19.6

6.5

4 4.5 5 5.5 6 7 8

19.6

600

24.5

For
control valves

Extrusion

This figure is prepared for our packing size series based on DIN 3780.

300

7233

8

4

8133/8133L

Unit: MPaANSI Class150

VFT-22

5

When agitators aremainly used
When pumps aremainly used
When valves aremainly used
When narrow ones are
specifically required

VALQUA No.

For corrosion resistance use

Only molded products are available. (When coils are required, separate consultation is needed)

○
△

Gland
Packingleakage along contact surface

Spacer ring

■ Anti-corrosion treatment of packing ■Graphite based packing may accelerate corrosion ofmating metal surface in contact with this packing. This isdue to a potential difference between the graphite (C)contained in the packing and the metal, that is, the graphite
functions as a cathode material with respect to theactivated anode of the counterpart, and increases thecurrent density.
In order to restrict such an activation of metals, ourgraphite based packing has appropriate amounts of anodeinhibiter and cathode protector for protecting metals. It isthus possible to prevent corrosion under wide variety ofservice conditions.

Shaft diameter d1 mm

4546

GlandPacking

Instruction Manual

VALQUATEX™

Flameproof Carbon Fiber Textile
VALQUA No.101C/105C/105CS

１

２

Determination of size
●For the purpose of obtaining stable performance,
it is recommended to use molded rings. Molded
rings not only contribute to the reduction of timerequired for assembling, but also play a criticalrole in maintaining favorable sealing property.
When coil type packing is used as it is,tightening force is hard to be conveyed to thedepth. As a consequence, a substantial
difference will arise between the gland follower
side and bottom side of the stuffing box, which
may cause stress relaxation, resulting in a causeof leakage.
●Check the shaft diameter and the stuffing box
inner diameter. If coil type packing isunavoidably used, select appropriate packing
with the same nominal packing size as the widthof stuffing box.
●If packing with a suitable size is unavailable fora given stuffing box, a 9.5 mm wide for example,
select a packing with a nominal size of 10 mm,
and adjust the size in the following way. That is,
first lay down the packing on a flat plate, anduniformly press it by rolling a round bar, so thatit may be 0.5 mm smaller than the width of the
stuffing box, namely 9.0 mm in this case, anduse it.

Cutting
In case of using coil type packing, set the length
per one ring of packing as in the following, and cut
it at an appropriate angle so as to allow no gap
when aligning them together.
L=1.62 to 1.65 (d+D)
where,
L : length per one ring of packing (mm)d : shaft diameter (mm)
D : Stuffing box inner diameter (mm)60〜80°
L

３

Installation of packing●Remove all the old packings. A packing tool, if
used, will facilitate the work, but care shall be
exercised so that the tool may not give damage
to the shaft.
●At the time of installation, make sure of thenumber and combination of the packing.
●Install one ring at a time. Seat each ring firmly,
making sure it is fully seated before the next ringis installed. Joints of successive rings should be
staggered and kept 90º to 120º apart.

４

Tightening and adjustment
In case of pumps●After installation of packing, tighten nuts
alternatively on the symmetrical position so as
to avoid uneven tightening, with a standard
tightening stress shown of about 1 to 2 MPa.
●Apply liquid and wet the packing sufficiently andcheck if it is well lubricated with leaking liquid
before retightening. In this case, do not tighten
or unfasten the nuts rapidly, but uniformly adjusteach nut by turning it by one or one half pitch of
the nut head (i.e., 1/6 to 1/12 rotation) undervisual check.
In case of valves●After installation of packing, tighten nuts
alternatively on the symmetrical position so as
to avoid uneven tightening, with a standard
tightening stress shown in the Design Data on
page 46.
●Retighten, if leakage occurs. In this case,tightening after reducing the inner pressure to
zero will be effective. Also take care so as to
avoid uneven tightening or too much tightening.

Yarn
VALQUA No.

101C

Applications
Heat resisting seal and the like

■ Standard dimensions ■Nominal size (mm)φ3
φ8
φ 12.5
φ 22

φ5
φ 9.5
φ 16
φ 25

Weight

φ 6.5
1.0 kg roll

φ 19

Cloth

５

Notice for storage●Do not degrade packing
Since some packing materials will be affectedby direct sunshine, oxygen and ozone in the air,and high temperature or humidity, store thepacking in a cool and dark place as far as
possible to avoid deterioration. Anti-corrosion
treated packing, in particular, shall not be stored
in an acid atmosphere or humid environment, orin a location subject to high temperature.
●Prevent adhesion of dust
Foreign substance like dust may adhere on the
products during storage or carelessness inhandling. Dust, once adhered, can not be
removed completely with ease, and will give
damage to the shaft, leading to leakage. Thus,
adequate care is needed.

Upon placing order●In case of coil products
Specify the product No., then the nominal
size and the quantity needed. For speciallytreated products, also specify lubricating oil
treated products-O, silicone oil treatedproducts-SO and fluoro oil treated productsFO.
(Ex)1. VALQUANo.7233:
10 mm - 3 m, one roll
2. VALQUANo.7233-FO:
10 mm - 3 m, one roll●In case of molded rings
Specify the product No., then the ring
dimensions (inner diameter x outer diameterx height) and the number of rings.
The following are available only in the formof molded rings:

No.VFC-25, No.VFC-25AE, No.6399H,
No.6399LAE, No.VF-10, No.VF-10AE,
No.VF-20LAE

47

Flame resisting carbonized fiber is made by heat treatment of polyacrylonitrile (PAN) fiber having a special
copolymerization. With excellent flame resistance and heat resistance as well as tough elasticity, it is wellcomparable with high grade asbestos fiber based textile. Because of its low heat conductivity, flame resisting
carbonized fiber is widely used as sealing material and flame & heat resisting material as a matter of course, andalso as heat insulating material. Heat resisting temperature limit when used as a sealing material is 250°C.

VALQUA No.

105C
FeaturessEven in direct contact with strong flame, flame resisting
carbonized fiber becomes red hot, but will not be fused nor
adhered.
sIt has excellent heat insulation efficiency, with its heat
conductivity being smaller than that of glass fiber or of thesame order as wool.
sIt is excellent in heat resistance(maximum service temperature: 250°C).
sAlso excellent in chemicals resistance, its weight loss inorganic solvent is negligible, while in inorganic chemicals, as
low as 2 to 3%.
sUnlike glass fiber or asbestos fiber, it has draping property andsoft touch, thus easy in handling.

Applications
Cladding material for heat insulation &cold insulation of pipe and ducts, heatinsulating material around engines andboilers, heat resisting curtains & covers
for heat insulation purpose, cladding
material for air conditioning ducts andbellows, cloth for heat resisting protective
equipment, as well as aprons, hoods andthe like.

■ Standard dimensions ■Nominal thickness(mm)

Dimensions

1.2

1,000mm×30m

Reference weightWeave(g/m2)
670

Plain
weave

Spatter resisting special cloth
VALQUA No.

105CS

Surface of flame resisting carbonized fiber
cloth is clogged with special inorganic
filler. No.105CS has good spattering
resistance and prevents adhesion of
spatter, breakage and hole. It is thus used
as cloth best suited for protective
equipment to be in direct contact withflame or with splashing chemicals.
Applications
Protective cloth for weld spark, protective
sheet for welding, heat shielding curtain
for welding, fire curtains and the like.

■ Standard dimensions ■Nominal thickness(mm)

Dimensions

Reference weightWeave(g/m2)

1.0

980mm×30m

720

Diagonal
weave

1.5

950mm×30m

950

Plain
weave

48

VALQUATEX™

VALQUA No.102G/ 105G/ 105GF/ 112G/ 112GA/ 112GC

VALQUA No.101S/ 102SF/ 102S/ 105S/ 105SN/ 112S/ 112SN

With the use of bulking treated yarn, these are better in flexibility and heat resistance (heat resisting
temperature of 350°C) than conventional glass cloth, and are best suited for cladding material to be used inheat insulation & cold insulation work as alternative textile for high grade asbestos textile.
Cloth
Applications
Cladding material for heat insulation &cold insulation of pipe and ducts, heatinsulating material around engines andboilers, heat resisting curtains & covers forheat insulation purpose, cladding material
for air conditioning ducts and bellows,
cloth for heat resisting protective
equipment, as well as aprons, hoods andthe like.

VALQUA No.

105G（cloth）

105GF（cloth withheat resisting
metal wire）

Made of ceramic fiber (super heat resisting inorganic fiber) and excellent in flexibility and high temperature
heat resistance, these are used as various types of sealing materials, as well as heat insulating material,
shielding material and protective material. Since a small amount of organic fiber is included in the
manufacturing process, some amount of smoke is generated at the initial stage of heating, while No.105SN
cloth and No.112SN ribbon (liver) are smoking prevention treated. As core material of cloth and ribbon yarn,
stainless wire is normally used, but others include glass fiber.
Ribbons

Width（mm）

Length（m）

（mm）

0.5

112S
（ribbon）

112SN（smoking prevention
treated ribbon）■ Standard dimensions ■

450
490

1,000

1.7

Diagonal
weave

920

30

2.7

Features

Reference Weave
weight（g/m2）

50

0.7

Plain
weave

1,750

Remarks: No.105GF is available with its nominal thickness of 1.5 t only.

sThese are nonflammable material with heat resistance equal toor better than asbestos fiber class AAA.
maximum service temperature of 350°C;
for applications requiring temperatures exceeding
350°C, separate consultation is advisedsThese are excellent heat insulating materials, with heat
conductivity one half or below of that of asbestos cloth.
sTheir tensile strength is high, as much as several times higher
than that of asbestos under normal temperatures.

102G（ribbon）

112GA（ribbon withaluminum on
one side）

112GC

Packing
VALQUA No.

112G

Applications
Heat resisting sealing material, door packing
and the like.

■ Standard dimensions ■Nominal size（mm）

length（m）

Reference weight（g/m2）（ribbon withadhesive on
one side）

7.9 square

83

0.4

9.5 square

117

0.7

15.9 square

200
317

19.0 square467

22.0 square584

25.4 square

734

Remarks: Round type is also available.

1.7

2.7

50
75
100
25
32
38
50
65
75
100

50

−

−

−

17

−

29

34

−

−

−

26

−

38

52

22

30

34

45

59

68

Plain
weave

30
42

53

64

（cloth）

105SN

Applications
High temperature curtains, high temperature
sealing material, gaskets, various types of hightemperature heat insulating material, protectors
against weld spark and the like.

（smoking
prevention
treated cloth）

85 106 128 170

White

Liver

Weave

Plain weave

Plain weave

Reinforcing material

Stainless wire

Stainless wire

Maximum service
temperature (°C)

1,260

1,260

Ignition loss (%)

＜28

＜10

Thickness (mm)2

1.8

Width (mm)

25

50

75

100

25

50

75

100

Reference weight (g/m2)

22

45

67

90

18

36

54

72

30

30

Yarn and rope
VALQUA No.

101S（yarn）

Applications
Various types of high temperature heatinsulating material, textile material and the like.

Applications
High temperature sealing material, various（braided yarn） types of high temperature heat insulating
material, and the like.
Components
Core: ceramic fiber, cladding : glass fiber

102SF

Applications（braided rope） High temperature sealing material.

■ Standard dimensions ■101S

VALQUA No.
Color tone
Reinforcing material−

Stainless wire

Maximum service
temperature (°C)

1,260

600

VALQUANo.

VALQUA No.

105S

105SN

Color tone

White

Liver

Weave

Plain weave

Plain weave

Reinforcing material

Stainless wire

Stainless wire

Maximum service
temperature (°C)

1,260

1,260

Ignition loss (%)

＜28

＜10

Thickness (mm)2

1.8

Width (mm)

1,000

1,000

Reference weight (g/m2)

＞900

＞720

One roll length (m)

30

30

102SF
White

Ignition loss (%)■ Standard dimensions ■

90

112S

Color tone

102S

Cloth

Diagonal
weave

Remarks: No.112GA and No.112GC are available in three types, i.e.,with their nominal thicknesses of 0.7, 1.7 and 2.7 mm
respectively.

49

sThese have low heat conductivity and are excellent in heatinsulation property.
sThese are flexible and excellent in workability.
sThese are also excellent in chemical stability.

105S

Reference weight（g/m2）
Nominalsize Width length
Weave（mm） （mm）（m） 25 32 38 50 65 75 100
wide wide wide wide wide wide wide

53

30

sThese are excellent in heat resistance and fire resistance.
maximum service temperature:
1,260°C, while 600°C for No.102SFVALQUA No.

■ Standard dimensions ■6.4 square

12.7 square

Applications
Cladding material for heat insulation &cold insulation of pipe and ducts, heatinsulating material around engines andboilers, heat resisting curtains & covers
for heat insulation purpose, furnace lining,water resisting cladding tape, furnace
conveyor covers, thermocouple protecting
material, maintenance material for hightemperature work and the like. equipment,
as well as aprons, hoods and the like.

112SN

VALQUA No.

One roll length (m)FeaturesRibbons
VALQUA No.

Applications
High temperature sealing material, various
types of high temperature heat insulating
material, and the like.

VALQUA No.

■ Standard dimensions ■Nominalsize

VALQUATEX™

Ceramic Fabric Textile

Heat-Resistant Glass Fiber Textile

＜25
101S
102S F

Nominal diameter (mm)lengthφ6φ
9
φ 12.5
φ 16
Length Any
φ 19
length,φ 22
but one meteror over
φ 25
φ 30
φ 38
φ 50

VALQUANo.

102S（with stainless wire）

Nominal diameter (mm)
6.4
9.6
12.7
15.9
19.0
22.0
25.0

length30m

Remarks:
No.101S (yarn), φ3 isalso available.

50

Related
Products

Gasket Cutter

Packing Tool

VALQUA No.CUTTERVALQUA No.TOOL

RelatedProducts

VALQUA Packing Tool is an indispensable special tool that allows easy
and accurate removal of packing to improve work efficiency.
q Supporting iron（300L）
w Floating pole for needle coree Floating pole for cutter blade

Packing hook (packing withdrawal tool)
Construction

q Flexible shaft
A special, soft shaft made of triple-wound steel wires, which
is so constructed so as to allow easy manipulation at a
packing space, very small and in the depth of the stuffing box
located also at a narrow space.
w Cork screw
A well hardened sharp screw, so made as to break into
packing.

Instructions
for useScrew in the cork screws (No.11 to 13) into the flexible shafts(No.1 to 3), and fasten them tight using a wrench, then screwin two shafts at two points on the opposite peripheral sides ofpacking as shown in the figure. Now, the packing will comeout easily by pulling thehandle (Figure A). To
remove an adapter, screw inthe male screw at the tip ofthe flexible shaft into a tap
hole of the adapter, thenpull it out.

r Straight core needlet Bending type core needley Bladeu Knob for floating pole（spare）
i Straight stud for floating poleo Pressure bolt for needle core!0 Pressure bolt for cutter blade!1 L-shaped handle!2 Grinding stone■ Instructions for use ■Maximum diameter : 540mm
By using a supporting iron (500 L) which is soldseparately, it is possible to cut out gaskets as large as
1,000 mm.

■ Upon placing order of parts ■Parts worn after long years of operation shall be
replaced with spare parts. Order of single item is also
accepted when certain items are missing.
As for cutter blades y , one replacement set
consisting of five blades is available

Flexible shaft

Hexagonal flatscrew diameter

L2

Cork screw
Full Available
length groove
Screw
Hexagonal flat
size d2（mm） screw dia D2（mm） Length L2（mm） Q'ty （mm） depth（mm）

No.

Screw
size d1（mm）

Shaft
size D1（mm）

No.1

4

5

200

2

No.11

4

No.2

6

6

240

2

No.12

No.3

8

8

300

2

No.13

Length L1（mm） Q'ty

No.

6

45

3

245

7 or over

6

8

50

3

290

9 or over

8

12

75

3

375 12 or overPacking damper (packing insertion tool)
Construction

Instructions
for useThe packing damper made of power spring steel
has at its end an R-shaped metal, which fits wellinto the packing space and the diameter of thesliding parts of the rod and shaft, so as to ensure
uniform insertion of packing.
Using the dampers (No.21, 22) that arecompatible with the packing groove and thediameter of the sliding parts, carefully push thepacking along its periphery for each turn as
shown inFigure B, andinstall it at aproperposition.
Figure BA

d2 D2Cork screw

B■ Dimensions of damper ■No.

Available
W1 W2 W3 T1 T2 R
L Available
grooverange（mm）（mm）（mm）（mm）（mm）（mm） （mm） depth（mm） (shaft dia)（mm）No.21 30

16

15

6

0.8

20 1856〜20

40〜100No.22 50

19

20

9

1.0

35 240 9 or over

75 or overPacking damper

W1

W2

R

T1

T2

W3
L

■ Application table ■Packing hook
Application

Minimum diameter : 50 mm

D1 Flexible shaft

Figure A

Objective■ Cutting ranges ■1. First, insert the straight core needle r or the bending
type core needle t at the bottom of the floating polefor needle core w, and fix it using the pressure bolt
for needle core o. In this case, use the bending typecore needle t if the cut diameter is up to 50 mm,
while the straight core needle r for cut diameter
larger than 50 mm.
2. Then, at the groove of the floating pole for cutter
blade e, attach the blade y with two pressure bolt
for cutter blade !0.
3. Penetrate the supporting iron q into the floating polefor needle core w and the floating pole for cutter
blade e.
4. Set the part marked with " " of the floating pole forneedle core w at the scale zero of the supporting ironq as shown in Figure A, and tighten firm with theknob.
5. Then, also shift the part marked with " " of thefloating pole for cutter blade e to a desired positionon the Supporting iron q determined by the radius of
the gasket to be cut, and tighten firm with the knob.
6.Before cutting, place the material on a sheet ofplywood board or a corrugated paper that is put on aflat base or a floor. Then, put the gasket cutter asshown in Figure B, hold with your left hand thefloating pole for needle core w, and lightly dig in thestraight core needle r or the bending type coreneedle t. Now, holding light with your right hand thefloating pole for cutter blade e, rotate it to go cutting
forward while slightly pushing as if to make a circle.
△sThis is a set of convenient tools to simply cut out flange
gaskets on a construction site or in an assembly work
shop.
sThe supporting iron has scale marks on its own, whichallows easy and accurate dimensioning.
sBy using a supporting iron (500L) which is sold separately,
it is possible to cut out gaskets as large as 1,000 mm.
sIt is really recommended to keep this tool as an
indispensable workshop item not only in a maintenancedepartment of a chemical plant, oil refinery or iron plant,
but also in an assembly shop of machine or equipment
manufacturer as well as in a pipe laying company.

d1△

Features

L1

For removalof packing
adapterPacking damper

Remarks

For installationof packing
adapter

Braid packing, rubber V
packing, PTFE V packing,adapter & spacer made ofresin and metal, lanternring, etc.

Soft packing adapter (1)Packing using braided
wire, rubber, rubber withcloth, PTFE, plastic;
adapter spacer made ofresin and metal, lanternring, etc.

Note (1) In case of metal adapters, tap out in advance so as to becompatible with the male screw at the tip of the flexible
shaft. At two positions, in the center of periphery.

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