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Quick Connect Couplings for refrigeration, automotive and air conditioning industries

Quick Connect Couplings

REFRIGERATION, AUTOMOTIVE& AIR CONDITIONING
CUPLA SERIESGENERAL CATALOG

Products Comply
with RoHS Directive

Cuplas Enable Flexible, Fast,and Secure Connections for Various Fluid Lines.
Nitto Kohki’s unique technologies and dedicated research have been proven by numerous
patents, which led to the development of 25,000 different Cupla variations.
• Diverse applications from general household to high-techindustries such as in oceanic and space development.
• Numerous sizes are available for various needs.
• Wide varieties of body materials such as steel, brass,plastic, aluminum or stainless steel are available.

For easy replacements:
Replacements of pneumatic / hydraulic tools, pneumatic /hydraulic cylinders, mold attachments, etc.

For temporary installation in test line:
Vacuum tests, pressure durability tests, leakage tests,
running tests, etc.

For filling:
For filling up various industrial gases, including inert gases,
nitrogen, LPG, carbon dioxide, oxygen, fuel gas, etc.

For maintenance services:
For computer cooling system, hydraulic cylinders in
die-casting machines.

For transfer:
For transfer of solid items through pipes such as screws andnuts as well as for electric power cable lines.

As joints:
Applications other than fluid transfer covering connections
for holding works while anchored or carried around.

A profusion of patented technology and recognitionof high quality and high performance by global users.
ISO 9001 and 14001 Certification Award“Cuplas“ quick connect couplings are produced as the crystallization ofhigh-grade know-how nurtured in the fields of fluid engineering and materials
engineering, and top level precision machining technology. Having assessed
Nitto Kohki consistent quality assurance and control system ranging fromdesign and development through procurement of material, manufacture,assembly, and shipping, the Japan Quality Assurance Foundation, authority for
inspection and registration, awarded us “ISO 9001“, international standard for
quality management systems, and “ISO 14001“, international standard forenvironment management systems intended to perform global environment
preservation and pollution control. High reliability built on unparalleled “highquality“ and accumulated history of “productivity“ for stable supply. Cupla isreceiving overwhelming support from many users spread all over the world as
the top brand for fluid energy transmission and control.

ISO 14001

ISO 9001

JQA-EM4057
ISO 14001

NITTO KOHKI CO.,LTD.

JQA-2025
ISO 9001

NITTO KOHKI CO.,LTD.
Couplings Division

Beware of imitations
Recently on the market, there have appeared similar products that invite misidentification or confusion with Nitto Kohki Cuplas, or such productsthat claim to have compatible mating parts. Nitto Kohki cannot accept responsibility for any accident that may result by mixed use with a couplingof another brand that seems connectable to a Nitto Kohki Cupla. Nitto Kohki Cuplas are produced with their own unique tolerances and precision
under strict quality control, and are not interchangeable with other couplings that are not under such tolerances. Therefore, connection to otherbrand of coupling may end up with abrupt breakdown or personal injury. Please be sure to check for our marks below, which are always inscribedon Nitto Kohki Cupla products, when you order and purchase.

1Specifications to Be Checked When Selecting Cuplas
Fluid and theTemperature

Select a Cupla with body andseal materials that suit thefluid and its temperature.

There are different body and seal materials to suit different fluids. For example, we recommend steel for air,and brass or stainless steel for water.

Fluid Pressure

Select a Cupla suitable for theactual max. fluid pressure.

Fluid pressure is also a key to Cupla selection. Each Cupla has a different structure to cope with eachpressure resistance range.

Automatic
Shut-off Valve

Select a Cupla with a valve
structure that suits the piping
application.

Valve combinations are two-way shut-off, one-way shut-off, or straight through types. Choose carefully.
Unless it is a two-way shut-off type, the internal fluid will flow out from the Cupla when it is disconnected.

Operating
Environment

Select a Cupla with design andmaterials that suit each
operating environment.

In choosing the type of Cupla, body material and seal material, consider the temperature range, possible dirt
and dust, and/or corrosive atmosphere in the operating environment.

Finally and critically specify
Size and Type ofthe size and type of end
End Configurations configurations.

Glossary

Having checked the type and materials for the Cupla,
now specify the size and type of end configurations
to suit the type of piping. Choose carefully, as thesize affects the fluid flow rate.

Note: End configuration and size may be limited by the type of Cuplas.

Hose
barb

FemalethreadMalethreadNutUnits stated in this catalog are based on SI Units. The old units, which are Non-SI Units,International System of Units (SI Units) are also written within parentheses side by side with SI Units for reference only.

Body Material
Indicates the material that is used for the plug body or socket body that forms
the flow path of fluid through the Cupla. Some products have internal
components of a different material. Please check with us for details.

Seal Material
This shows the material used to seal the Cupla, usually an O-ring.
Properties of rubbers used for O-rings
Seal material

Working
Temperature Range

Features-20°C to +80°C

Standard seal with excellent oil resistance.

Hydrogenatednitrile rubber

HNBR-20°C to +120°C(H708)

Max. Tightening TorqueConsidering the balance between possible leakage caused by loose fit and too
much structural stress when a Cupla is mounted on a workpiece, the appropriate
screw-in torque value is suggested by the maker.

Compared with the standard nitrile rubber,the seal material is more heat and weather
resistant. In addition to these features, theseal material can also be used forrefrigeration oil and refrigerant applications
such as HFC-134a.

Fluoro rubber

FKM-20°C to +180°C(X-100)

Excellent for heat, weather, and oil resistance.
Applicable to wide range of applications.

CR(X-306)-20°C to +80°C

Excellent weather resistance.

Min. Cross-Sectional Area
The minimum cross-sectional area of the fluid path when the Cupla is connected.

ChloroprenerubberCR(C308)-20°C to +80°C

In addition to the above features, the sealmaterial can also be used for refrigerant
applications such as HFC-134a.

Size
Indicates the nominal size of the pipe thread connection or of the hose to be
used.
Working pressure
The normal allowable fluid pressure under continuous use.

Suitability for Vacuum
Indicates if the Cupla has necessary performance required for vacuum
applications. (Note that the required performance is different in connection
and in disconnection.)

Common name

Mark

Nitrile rubber

NBR
(SG)

Note:
1. Even among rubber materials of the same category, the working temperature range differs depending
upon the design of the Cuplas. For details, see the specifications of each Cupla series. As for the Nitto
symbol for rubber material, fluoro rubber is designated as “FKM” or “X-100” for example.
2. The above are general features, but the seal resistance depends on fluid temperature, fluid concentration,
and additives contained in the fluid.

Flow Direction
The design of some Cuplas may restrict the fluid flow direction only to one way.
Check the maker’s suggested direction before installation.
Interchangeability
Indicates whether the Cupla plug and socket can be connected with each other.
Working Temperature Range
The minimum and maximum temperature, in-between which the Cupla with theseal material can be used. However, it does not mean that they can be used
continuously at the minimum or maximum working temperatures.
Please check with us if you need Cuplas in such extreme applications.
Automatic Shutoff Valves
The structure of valves that open on connection and shut on disconnection
automatically.
Pressure Loss
The loss of pressure when fluid runs through the Cupla set.

Green Procurement
Nitto Kohki has made every effort in developing “Environmental
Improvement Plans” through the implementation of ISO14001,
to execute environmentally conscious business activities on acompany-wide basis. As a part of our ongoing commitment to theenvironment, we are also committed to reduce and/or exclude
restricted chemical substances from our products as designatedby RoHS directives, laws and regulations of chemical substances
in Japan.
For further details, please visit www.nitto-kohki.co.jp/e/.

2

INDEX

Refrigerant Cupla Series

Contributes to charging and inspection work on refrigerators, air conditioners and automobile-related equipment.

For charging of air, nitrogen, refrigerant and refrigerant oil, and for vacuum suction and helium leak test

Name and Type

Outer Appearance

For Vacuum Suction andRefrigerant Charging

SP-V Cupla
Double O-ring Version of
SP-V Cupla

S-V-W Type
Non-interchangeable with SP-V Cupla

SP-V-GN Cupla(SP-V-GNN Cupla)

Double O-ring Version of
SP-V-GN Cupla

S-V-GN-W TypeFor Connection to Straight
Aluminum / Copper Pipe

PCV Pipe Cupla
For Connection to Straight
Aluminum / Copper Pipe

Pipe Cupla PCVH Type
Triple Seal Version of
PCV Pipe Cupla

PCV-W TypeFor Connection to Male Thread

Screw Cupla PCS TypeHigh Pressure Version of
Screw Cupla PCS Type

PCS-HP TypeFor Charging Industrial Gases
and Refrigerants

Charge Cupla CS TypeHigh Pressure Version ofCharge Cupla CS Type

Charge Cupla CS-HP TypeFor Charging Industrial Gases andRefrigerants (With Purge Function)

Charge Cupla CNR Type / LRP TypeFor Charging Industrial Gases
and Refrigerants

Airless Charge Cupla CNA TypeFor Automatic Plug Disconnection

Auto Cupla ACV TypeHigh Pressure Version ofAuto Cupla ACV Type

Auto Cupla ACV-HP TypeFor Automatic Valve Opening / Closing
and Plug Connection / Disconnection

Auto Cupla AC Type (ACS Type)High Pressure Version ofAuto Cupla AC Type

Auto Cupla AC-HP Type

Body material

SizeCounterpart

Brass
Stainless steel

Rc 1/4, Rc 3/8
Rc 1/2, Rc 3/4

SP-V

Brass
Stainless steel

Rc 1/4, Rc 3/8
Rc 1/2, Rc 3/4

2P-V, 3P-V
4P-V, 6P-V

• Employs a double O-ring sealing structure in
the socket of SP-V Cupla.
• Employs double O-rings to improve airtightness
and vacuum resistance when connected.

6

Brass
Stainless steel

Rc 1/4, Rc 3/8
Rc 1/2, Rc 3/4

SP-V-GN(SP-V-GNN)• Prevents an operator from mixing up different
refrigerants.
• One groove is formed in the spanner surface
to differentiate from the SP-V Cupla.

7 to 8Brass
Stainless steel

Rc 1/4, Rc 3/8 2P-V-GN, 3P-V-GN the socket of SP-V-GN Cupla.
Rc 1/2, Rc 3/4 4P-V-GN, 6P-V-GN • Employs double O-rings to improve airtightness

3

Note: Products with an asterisk (• For vacuum suction and refrigerant charging.
• Various seal materials available for wide
variety of refrigerants.

Page
5 to 6• Employs a double O-ring sealing structure in8

and vacuum resistance when connected.
• Can be connected/disconnected without pipe

Brass

R 1/4, R 3/8

Copper pipe
forming.
diameter• Perfect for pressure resistance test, vacuum
4 to 15.88 mm OD suction and refrigerant charging.

Brass

R 1/4, R 3/8

Copper pipe
diameter
4 to 15.88 mm OD

Brass

R 1/4, R 3/8

Copper pipe
diameter
4 to 15.88 mm OD• A triple seal structure is employed, one at the endof pipe and two on the outside of pipe.
• Highly effective for airtightness and vacuum
holding.

11

Steel(Partly stainless steel
and brass)

R 1/4, R 3/8

7/16 to1 1/16UNF• By pushing the Screw Cupla direct to the male threadfor connection improves operating efficiency.
• Built-in ball lock sleeve prevents accidental
disconnection, ensuring safe operation.

12

Steel
(Partly stainless steel
and brass)

R 1/4, R 3/8

7/16 to1 1/16UNF

Stainless steel(Partly aluminumand brass)

Rc 1/42P-V, 3P-V

Stainless steel(Partly aluminumand brass)

Rc 1/4, Rc 1/2

2P-V, 3P-V
4P-V

Stainless steel(Partly aluminumand brass)

Rc 1/4, Rc 3/8
Rc 1/2

2P-V, 3P-V
4P-V

Stainless steel(Partly aluminumand brass)

Rc 3/8

CNA-3P-V

Stainless steel(Partly aluminumand brass)

Rc 1/4, Rc 3/8

2P-V, 3P-V

Stainless steel(Partly aluminumand brass)

Rc 1/4, Rc 3/8

2P-V, 3P-V

Stainless steel(Partly aluminumand brass)

Rc 1/4, Rc 3/8

2P-V, 3P-V

Stainless steel(Partly aluminumand brass)

Rc 3/83P-V

Stainless steel

R 1/4, R 3/8

7/16 to1 1/16UNF• Lever shape has been changed for smooth
operation.

• Suits for refrigerants that require highpressure.

• Connects to the standard 2P-V and 3P-V Plugs.
• Can be connected or disconnected even when
the residual pressure remains.

9 to 10

11

12

13

• Suits for refrigerants that require high pressure.

14• Can be connected or disconnected even when
the residual pressure remains.
• Lifting the lever discharges the residualpressure for easy disconnection of the plug.
• An automatic airless valve minimizes admixture
volume of air on connection and fluid spillage
on disconnection.
• Connects to the standard 2P-V and 3P-V Plugs.
• Disconnects the plug with air-driven mechanism.

15

16

17

• Suits for refrigerants that require high pressure.

18• Connects to the standard 2P-V and 3P-V Plugs.
• Air-driven mechanism is employed to connect
and disconnect the plug and to open andclose the valve.

19• Suits for refrigerants that require high pressure.

Screw-on Type Cupla

Screw Cupla NCF Type

Features / Applications) are made-to-order items. Please contact us for details.

20• Screws on to the male unified thread easily.
• Employs a three-terraced-shape lip packing
as a seal material.

21

INDEX

Pipe Cupla Series

Directly connects with any type of pipe end configurations.
Caution for Custom-made Cuplas
Custom-made Cuplas are products designed and produced based on the specifications presented by the customer. Prior to actual production, technical documentation presented by us (drawings, specification
sheets, etc.) shall be exchanged and approved by the customer. For the use of the product, the customer shall check the safety and the full compatibility with the equipment used by evaluating its performancethoroughly, under actual operating conditions. We shall in no case be liable for any loss or damage if the Cupla is used outside the conditions and specifications set out in the original technical documentation.

Name and Type

Outer Appearance

Equipped with Special Chuck Lock System
for Expanded Pipes and Bulged Pipes

Body material

SizeCounterpart

Features / Applications

Stainless steel

Specifiedby a customer

Based oncustomer’s
pipe size
dimensions• Employs a special chuck lock system toreduce lock scratches and improvepressure resistance.

Brass
Stainless steel

Specifiedby a customer

Based oncustomer’s
pipe size
dimensions• Employs a ball lock system to grip on theouter surface of pipe.

Brass
Stainless steel

Specifiedby a customer

Based oncustomer’s
pipe size
dimensions• Employs a double-row ball lock system togrip on the outer surface of pipe securely.

Plastic(Partly stainless steel)Specifiedby a customer

Based oncustomer’s
pipe size
dimensions• Employs plastic chucks that scarcely
scratches pipes.

Stainless steel(Partly aluminumand brass)Specifiedby a customer

Based oncustomer’s
pipe size
dimensions• Employs a ball lock system to grip on
the outer surface of pipe. Improved
connection and disconnection with lever
operation.

25

Brass
(Partly steel)Specifiedby a customer

Based oncustomer’s
pipe size
dimensions• Employs a ball lock system to grip on theouter surface of pipe. Improved
connection and disconnection with lever
operation.

25

Brass
(Partly stainless steel
and steel)Specifiedby a customer

Based oncustomer’s
pipe size
dimensions• Combination of PCV Pipe Cupla and the residualpressure release device for easy disconnection.
• Raising the lever of the residual pressure
release device discharges the residualpressure for easy pipe disconnection.

26

Brass
Stainless steel

Specifiedby a customer

Based oncustomer’s
pipe size
dimensions• Suits for connection and disconnection
with pipe fittings. A ball lock system grips
on the rear of the hex. nut of pipe fitting
upon connection.

26

Brass
(Partly stainless steel
and steel)Specifiedby a customer

Based oncustomer’s
pipe size
dimensions• Unique lock design on pipes allows someslight variations in pipe dimensions.

Stainless steel(Partly steel)Specifiedby a customer

Based oncustomer’s
pipe size
dimensions• Suits for connection and disconnection
with large diameter straight pipes.

Stainless steel(Partly aluminum)Specifiedby a customer

Based oncustomer’s
work size
dimensions• Suits for connection and disconnection
with pipe fittings.

Stainless steel

Specifiedby a customer

Based oncustomer’s
pipe size
dimensions• A special chuck lock system is employed
to reduce lock scratches and improvepressure resistance.

Stainless steel(Partly aluminum)Specifiedby a customer

Based oncustomer’s
thread size
dimensions• By pushing the Screw Cupla direct to thefemale thread for connection improves
operating efficiency.

Stainless steel(Partly aluminum)Specifiedby a customer

Based oncustomer’s
work size
dimensions• Employs balls to lock at the leading end
of workpiece from the inside.

Stainless steel(Partly aluminumand steel)Specifiedby a customer

Based oncustomer’s
work size
dimensions• Employs chucks to lock at the leading
end of workpiece from the inside.

Stainless steel

Specifiedby a customer

Based oncustomer’s
pipe size
dimensions• Employs chucks to grip on the inner wallof pipe. Suitable for applications with asmall amount of clearance.

Stainless steel

Specifiedby a customer

Based oncustomer’s
pipe size
dimensions• Air-driven mechanism is employed in the
Auto Cupla to disconnect the pipe
automatically.

Brass(Partly stainless steel)Specifiedby a customer

Pipe Cupla PCHS TypeFor Expanded Pipes

Pipe Cupla PCB TypeFor Bulged Pipes
and Spool Pipes

Pipe Cupla PCBW TypeFor Bulged Pipes
and Spool Pipes

Pipe Cupla PCP TypeFor Straight Pipes

Pipe Cupla PCBL TypeFor Straight Pipes

Pipe Cupla PCLB TypeFor Straight Pipes

PCV Pipe Cupla with Residual
Pressure Release Device
For Pipes with Fittings

Pipe Cupla PCB TypeFor Straight Pipes and Pipes
with Blind Rubber Plugs

Pipe Cupla PCW TypeFor Large Diameter
Straight Pipes

Pipe Cupla PCA TypeFor Special Pipes

Pipe Cupla PCD TypeHigh Pressure Typefor Spool Pipes

Pipe Cupla PCH TypeFor connecting directly to thefemale thread

Screw Cupla PCSI TypeFor Locking at the Leading Endof Workpiece from the Inside

Pipe Cupla PCBI TypeFor Locking at the Leading Endof Workpiece from the Inside

Pipe Cupla PCI TypeFor Pipe Inner Wall Lock

Pipe Cupla PCIF TypeFor Automatic Pipe Disconnection

Auto Cupla APCB TypeFor Refrigerant Charge Valves Used in
Car Air Conditioner Production Lines

PCB Type Cupla for Charge ValvesNote: Products with an asterisk (• Quick connection and disconnection with
Refrigerant
refrigerant charge valves used in car air
charge valves usedin car air conditioner conditioner production lines.
production lines) are made-to-order items. Please contact us for details.

Page
23

23

24

24

27

27

28

28

29

29

30

30

31

31

4

For Charging Refrigerant, Helium Gas and Vacuum Suction

SP-V Cupla

Seal Materials for Refrigerants

Cupla with a built-in automatic shut-off
valve for charging refrigerant, helium gas
and vacuum suction.

Excellent sealing structure with a built-in automatic shut-off valve
developed for charging refrigerant and vacuum suction. Both socket
and plug are completely sealed when disconnected withstanding up
to vacuum of 1.3 x 10-1 Pa (1 × 10-3 mm Hg).
Various body and seal materials are available for the production of
air-conditioning units, refrigerators and package air-con.
(refrigerant charging, vacuum suction and leak test)

Various eco-friendly refrigerants for air conditioner and refrigerator have beendeveloped. Nitto Kohki, having invested years in the research and developmentof excellent seal materials to withstand refrigerants and refrigerant oils, hasmade early attempts to develop and manufacture the seal materials for these
eco-friendly refrigerants.
Seal material
Hydrogenated nitrile rubber

Chloroprene rubber

Mark

HNBR (H708)

CR (C308)

Features

Resistant to hydrofluorocarbons(HFC-134a, HFC-407C, HFC-410A,
HFC-404A), and PAG type and ester
type oils.
Also resistant to heat up to 120°C.

Excellent resistance tohydrochlorofluorocarbons(HCFC-22 and HFC-134a).

Application

Refrigerator production lines
Air conditioner production lines
Air conditioner production lines

Both socket and plug have automatic
shut-off valves (airtight structure)
inside.

Both socket and plug have unique vacuum
resistant automatic shut-off valves inside.
The valve prevents fluid spill out on
disconnection, and also has excellent
vacuum resistance even after disconnection.
A unique straight guide isincorporated to stabilize
valve movement.

Adopted fluoro-rubber(FKM), hydrogenatednitrile rubber (HNBR), andchloroprene rubber (CR)as the standard seal materials
to suit air conditioner andrefrigerator production lines.

A double sealing
structure employed
for improved
airtightness.

Standard body materials are brass and stainless steel.
(Note: Models 4SP-V and 6SP-V of stainless steel bodyare made-to order items)
The photos show a connected 3S-V and 3P-V.

Specifications

Flow Direction
Brass(Standard material)

Body material
Size (Thread)Working pressure

Stainless steel Stainless steel(Standard material) (Made-to-order item)

1/4", 3/8"

1/2", 3/4"

1/4", 3/8"

1/2", 3/4"

MPa

5.0

3.0

7.5

4.5

kgf/cm2

51

31

76

46

bar

50

30

75

45

PSI

725

435

1090

653

Seal material

Mark

Working
temperature range

Remarks

Chloroprene rubber

CR (C308)−20˚C to +80˚C

Seal material

Working temperature range Fluoro rubber FKM (X-100) −20˚C to +180˚C
Hydrogenatednitrile rubber

HNBR (H708) −20˚C to +120˚C

Standard
material

TorqueInterchangeability
Socket and plug with different sizes cannot be connected to each other.
Interchangeable with SP Cupla Type A but take heed of flow rate reduction.

Max. Tightening Torque (Nm {kgf • cm})
1/4"

3/8"

1/2"

3/4"

Brass

9 {92}

12 {122}30 {306}

50 {510}

Stainless steel

14 {143}

22 {224}60 {612}90 {918}

Size (Thread)

Fluid may flow in either direction from plug or from socket side when coupled.

Flow Rate – Pressure Loss Characteristics[Test conditions]
1.0 {10}

Min. Cross-Sectional Area (mm )
2SP-V

3SP-V

4SP-V

6SP-V

18

38

71

110

Suitability for Vacuum (1.3 × 10-1 Pa {1 × 10-3 mmHg})
Socket only

Plug only

When connected

Operational

Operational

Operational

Admixture of Air on Connection (mL)
5

Model

2SP-V

3SP-V

4SP-V

6SP-V

Volume of air admixture

1.0

2.4

3.2

10.5

Pressure loss in MPa {kgf/cm2}

Model• Temperature : 24˚C ± 6˚C

2SP-V
3SP-V
4SP-V (Brass)
4SP-V (Stainless steel)
6SP-V (Stainless steel)
6SP-V (Brass)2

Min. cross-sectional area

• Fluid : Water

0.1 {1}0.01 {0.1}1

Flow rate in L/min

10

100

1000

Models and Dimensions (WAF : WAF stands for width across flats.)
Socket

Plug

T

D

T

MARK

H

C
L

Model

Application

2S-V

H

L

Mass (g)Dimensions (mm)

Mass (g)ModelApplication

Rc 1/4

2P-V

R 1/4

21

Rc 3/8

3P-V

R 3/8

29

Rc 1/2

4P-V

R 1/2

35

Rc 3/4

6P-V

R 3/4

211

Brass

Stainless
steel

L

øD

H (WAF)

T

R 1/4

136

127

58

28

19

3S-V

R 3/8

217

197

65

35

4S-V

R 1/2

421

393

72

45

6S-V

R 3/4

709

658

88

55

Dimensions (mm)Brass

Stainlesssteel

L

H (WAF)

C

T

39

34

36

Hex. 1722

Rc 1/467

59

40

Hex. 2125

Rc 3/8

123

118

44

Hex. 2928

Rc 1/2

202

52

Hex. 35

36

Rc 3/4

Application Example

Double O-ring Version of SP-V Cupla

SP-V Cupla S-V-W TypeDouble O-ring sealing structure

Employs a double O-ring sealing structure
to suit high airtightness.
Highly effective in airtightness and vacuum
resistance when connected!
Specifications

The photo shows connection of the 3S-V-W and 3P-V.

The same specifications as the SP-V Cupla.
See the SP-V Cupla specifications.

Dimensions
The same dimensions as the SP-V Cupla.
See the SP-V Cupla dimensions.

Note: No lubricant is applied to HNBR O-ring in the socket. Please apply refrigerant oil to O-ring before use.

Model

Application

2S-V-W

R 1/4

3S-V-W

R 3/8

4S-V-W

R 1/2

6S-V-WR 3/4

6

Non-interchangeable with SP-V Cupla

SP-V-GN Cupla

Comparison of External Appearance

Prevents an operator from mixing up
different refrigerants.

It may cause damage to equipment or products if different
refrigeration oils are mixed together.
• There is no interchangeability between SP-V Cupla and SP-V-GN
Cupla to prevent accidental misconnection.
• A socket of SP-V-GN Cupla has a different shape from that of SP-V
Cupla and has a groove on the body. A plug of SP-V-GN Cupla also
has a groove on the Nut to be distinguished from SP-V Cupla.

X indicates non-interchangeability.

SocketPlug

SP-V Cupla

OK

SP-V-GN CuplaOK

One groove

One groove

SP-V-GNN CuplaOK

Two grooves

Two grooves

Automatic shut-off valves (airtightstructure) in both socket and plug.

Blue HNBR O-ring is
employed for easy
identification to makereplacement of the socket’s
O-ring without fail.

Both socket and plug have unique vacuum
resistant automatic shut-off valves inside.
The valve prevents fluid spill out on
disconnection, and also has excellent
vacuum resistance even after disconnection.
A unique straight guide isincorporated to stabilize
valve movement.

A double sealing
structure employed
for improved
airtightness.

Standard seal materials arefluoro rubber, HNBR and CR
to suit air conditioner andrefrigerator production lines.

Brass and stainless steel body materials are available.
The photo shows connection of the
3S-V-GN and 3P-V-GN.

Specifications

Flow Direction

Body material

BrassSize (Thread)Working pressure

Stainless steel

1/4", 3/8"

1/2", 3/4"

1/4", 3/8"

1/2", 3/4"

MPa

5.0

3.0

7.5

4.5

kgf/cm2

51

31

76

46

bar

50

30

75

45

PSI

725

435

1090

653

Seal material

Mark

Working
temperature range

Remarks

CR (C308) −20˚C to +80˚C
Chloroprene rubber
Seal material
Working temperature range Fluoro rubber FKM (X-100) −20˚C to +180˚C
Hydrogenatednitrile rubber

HNBR (H708) −20˚C to +120˚C

Standard
material

Fluid may flow in either direction from plug or from socket side when coupled.

Interchangeability (See page 8 for details.)
Different sizes are not interchangeable each other.
Cannot be connected with the SP-V Cupla.

Max. Tightening Torque (Nm {kgf • cm})
1/4"

3/8"

1/2"

3/4"

Brass

9 {92}

12 {122}30 {306}

50 {510}

Stainless steel

14 {143}

22 {224}60 {612}90 {918}

Size (Thread)
TorqueFlow Rate – Pressure Loss Characteristics[Test conditions]
1.0 {10}

Min. Cross-Sectional Area (mm )2SP-V-GN

3SP-V-GN

4SP-V-GN

6SP-V-GN

18

38

71

110

Suitability for Vacuum (1.3 × 10-1 Pa {1 × 10-3 mmHg})
Socket only

Plug only

When connected

Operational

Operational

Operational

Admixture of Air on Connection (mL)
7

Model

2SP-V-GN

3SP-V-GN

4SP-V-GN

6SP-V-GN

Volume of air admixture

1.0

2.4

3.2

10.5

Pressure loss in MPa {kgf/cm2}

Model• Temperature : 24˚C ± 6˚C

2SP-V-GN
3SP-V-GN
4SP-V-GN(Brass)2Min. cross-sectional area

• Fluid : Water

4SP-V-GN(Stainless steel)
6SP-V-GN(Stainless steel)

0.1 {1}

6SP-V-GN(Brass)0.01 {0.1}1

Flow rate in L/min

10

100

1000

Models and Dimensions (WAF : WAF stands for width across flats.)
Socket

Plug

T

D

T

MARK

H

H

C
L

Model

Application

2S-V-GNL

Dimensions (mm)ModelApplication

Rc 1/42P-V-GN

21

Rc 3/829

Rc 1/235

Rc 3/4

LøD

H (WAF)

T

R 1/4

58

28

19

3S-V-GN

R 3/8

65

35

4S-V-GN

R 1/2

72

45

6S-V-GN

R 3/4

88

55

Detailed Comparison of the SP-V and SP-V-GN Plugs

Dimensions (mm)L

H (WAF)

C

T

R 1/4

36

Hex. 1722

Rc 1/43P-V-GN

R 3/8

40

Hex. 2125

Rc 3/84P-V-GN

R 1/2

44

Hex. 2928

Rc 1/2

6P-V-GN

R 3/4

52

Hex. 35

36

Rc 3/4

Interchangeability

SP-V-GN(O-ring seal surface dia.)

SP-V(O-ring seal surface dia.)

SP-V

SP-V-GN(Max. outer dia.)

MARK(Max. outer dia.)

When a plug of SP-V type is inserted into a socket of SP-V-GN type

When a plug of SP-V-GN type is inserted into a socket of SP-V type

SP-V-GNN Cupla
We also manufacture the SP-V-GNN type which has no interchangeability (non-interchangeable type)with the SP-V and SP-V-GN types.

MARK

Two grooves

A plug of SP-V-GN type cannot be
inserted any further into a socket of
SP-V type as shown in the figure to
the left due to the outer diameter ofthe plug being larger than the innerdiameter of the socket. Therefore,
the plug and socket cannot be
connected and the shut-off valves
in both Cuplas do not open.

Two grooves

Double O-ring Version of SP-V-GN Cupla

SP-V-GN Cupla

A plug of SP-V type cannot be
inserted any further into a socket of
SP-V-GN type as shown in the figure
to the left due to the outer diameterof the plug, where the surface issealed by O-ring, being larger than
the inner diameter of the socket.
Therefore, the plug and socket
cannot be connected and theshut-off valves in both Cuplas do
not open.

Double O-ring sealing structure

S-V-GN-W Type

Employs a double O-ring sealing structure in
the socket of SP-V-GN Cupla to achieve highairtightness. Highly effective in airtightness
and vacuum resistance when connected!

The photo shows connection of the 3S-V-GN-W and 3P-V-GN.

Specifications
The same specifications as the SP-V-GN Cupla.
Please refer to the specifications of SP-V-GN Cupla (Page 7).

Dimensions
The same dimensions as the SP-V-GN Cupla.
Please refer to the dimensions of SP-V-GN Cupla (Page 8).

Note: No lubricant is applied to HNBR O-ring in the socket. Please apply refrigerant oil to O-ring before use.

Model

Application

2S-V-GN-W

R 1/4

3S-V-GN-W

R 3/8

4S-V-GN-W

R 1/2

6S-V-GN-W

R 3/4

8

For Connection to Copper Pipes

PCV Pipe Cupla

Clamps directly on a straight copper pipe
eliminating unnecessary welding or flaring.
Double seal construction withstands a
vacuum of up to 1.3 × 10-1 Pa.
Suits for refrigerants that require highpressure.

• Withstands a vacuum of up to 1.3 x 10-1 Pa {1 x 10-3 mmHg}(when connected) making it possible to be used in leak test,
vacuum suction and refrigerant charge.
• Select from three standard types of seal materials to be usedwith fluids for air conditioner and refrigerator production lines.
Many models to suit various pipe sizes.
• One lever operation simultaneously clamps and seals pipe.
Double seal construction for tight fit on end and outside surfaceof pipe ensures excellent sealing and vacuum resistance.

Wide variations of end configurations; 1/4”, 3/8” and blind plug.
Double seal design for tight fit on
both end and outside of pipe.
Standard seal materials fluoro rubber (FKM), hydrogenatednitrile rubber (HNBR) and chloroprene rubber (CR) to suit
air conditioner and refrigerator production lines.

Hydrogenated nitrile rubber (HNBR) is coloredin blue for easy recognition.

One lever operation simultaneously clamps and seals pipe.

For exclusive use on straight copper pipes.
Many models to cover various pipe sizes.

The above photos are for PCV800.

Specifications

Clamping Mechanism

Model

Before clamping

PCV400 PCV470 PCV500 PCV600 PCV630 PCV800 PCV950 PCV1000 PCV1270 PCV1590
ø4.0 ø4.76 ø5.0
(3/16")

Copper pipe OD

ø6.0 ø6.35 ø8.0 ø9.52 ø10.0 ø12.7 ø15.88(1/4") (5/16") (3/8")(1/2") (5/8")

After clamping
SleeveCopper pipe

Chuck
Seal
materials

Lever

Push down

Body material

BrassWorking pressure

4.5 MPa, 46 kgf/cm , 45 bar, 653 PSI
2Seal material

Mark

Working
temperature range

Seal material

Chloroprene rubber

CR (C308)−20˚C to +80˚C

Working temperature
range

Fluoro rubber

FKM (X-100)−20˚C to +180˚C

Hydrogenatednitrile rubber

HNBR (H708) −20˚C to +120˚C

Remarks
Standard
material

3/8"

9 {92}

12 {122}t

1/4"TorqueCu

Pipe Outside Diameter, Insert Length of Pipe into Cupla,
and Minimum Thicknessof Pipe Wall (mm)Max. Tightening Torque (Nm {kgf • cm})
Size (Thread)

When the lever is pushed down, the sleeve moves in the direction of the arrow, and at
the same time actuates the chucks to grip the copper pipe firmly and provide a tight seal.

Min. Cross-Sectional Area (mm2)Model

PCV400

PCV470

PCV500

PCV600

PCV630

PCV800Min. crosssectional area

3.8

3.8

3.8

9.1

9.1

16.6

Model

PCV950

PCV1000

Min. crosssectional area

16.6

16.6

PCV1270-2 PCV1270-3 PCV1590-2 PCV1590-3
50.3

73.9

50.3

78.5

Suitability for Vacuum (1.3 × 10 Pa {1 × 10 mmHg})-1-3

Cupla only

When connected to a pipe-

Operational

Interchangeability

9

A pipe can be connected to any model within the product group as shown inPage 10 regardless of the size (T) for mounting. A Cupla can be connected toany pipe with an odd shape provided that a pipe has appropriate outside
diameter and enough insertion length.

Items with asterisk (*) are made-to-order products.

ProductGroup

Pipe OD(Cu)

PCV400*ø4.0

PCV470ø4.76 (3/16")

PCV500*ø5.0

PCV600ø6.0

PCV630ø6.35 (1/4")

PCV800ø8.0 (5/16")

PCV950ø9.52 (3/8")

PCV1000*

ø10.0

PCV1270

ø12.7 (1/2")

PCV1590

ø15.88 (5/8")

Insert Length of
Pipe into Cupla( )Minimum Thicknessof Pipe Wall(t)

19
0.8 or more

20.5

30

Please contact us for a pipe that has short insertion length or thin wall.

1.0 or moreModels and Dimensions (WAF : WAF stands for width across flats.)

Cu

B

E

D

L

T

H

The above photo is for PCV800.

Product GroupPCV400*

PCV470

PCV500*

PCV600

PCV630

PCV800

PCV950

PCV1000*

PCV1270

PCV1590

Pipe OD
(Cu)
ø4.0
ø4.76
(3/16")
ø5.0

ø6.0

ø6.35
(1/4")
ø8.0(5/16")
ø9.52(3/8")
ø10.0
ø12.7(1/2")

ø15.88(5/8")

Dimensions (mm)ModelApplication

Mass
(g)

L

PCV400-2

Rc 1/4

155(59)

PCV400-3

Rc 3/8155(60)

PCV470-2

Rc 1/4155(60)

PCV470-3

Rc 3/8160(61)

PCV470-0

Blind plug

160

(47)

-

PCV500-2

Rc 1/4

155(59)

Hex. 17

PCV500-3

Rc 3/8155(60)

PCV600-2

Rc 1/4150(60)

PCV600-3

Rc 3/8155(61)

PCV600-0

Blind plug

155

(47)

-

PCV630-2

Rc 1/4

145(60)

Hex. 17

PCV630-3

Rc 3/8150(61)

Hex. 17

H (WAF)øD

Hex. 1722.2

Hex. 19
Hex. 1722.2

Hex. 19

22.2

Hex. 19
Hex. 1722.2

Hex. 19

22.2

Hex. 19

PCV630-0

Blind plug

150

(47)

PCV800-2

Rc 1/4175(62)

PCV800-3

Rc 3/8180(63)

PCV800-0

Blind plug

185

(50)

-

PCV950-2

Rc 1/4

175(62)

Hex. 17

PCV950-3

Rc 3/8180(63)

Hex. 17

PCV950-0

Blind plug

180

(50)

PCV1000-2

Rc 1/4

155(62)

PCV1000-3

Rc 3/8

155(63)

PCV1270-2

Rc 1/4470(80)

PCV1270-3

Rc 3/8465(81)

PCV1270-0

Blind plug

475

PCV1590-2

Rc 1/4

PCV1590-3
PCV1590-0

24.8

Hex. 19

24.8

Hex. 19

24.8

Hex. 19

øB
2.2
2.2

E

T
R 1/4

(32.5)

R 3/8
R 1/4

(32.5)

R 3/8

2.2
3.4

R 1/4

(32.5)

R 3/8
R 1/4

(32.5)

R 3/8

3.4

R 1/4
(32.5)

R 3/8

4.6

R 1/4
(35.5)

R 3/8

4.6

R 1/4
(35.5)

R 3/8

4.6

R 1/4

(35.5)

R 3/8

Hex. 24

8.0

Hex. 24

9.7

(68)

-

-

-

424

(80)

Hex. 24

8.0

R 1/4

Rc 3/8435(81)

Hex. 24

10.0

Blind plug

445

(68)

-

-

34.8

34.8

R 1/4
(45.0)

R 3/8(45.0)

R 3/8-

For mass with a plug, add (brass body) 2P-V: 39 g, 3P-V: 67 g, (stainless body) 2P-V: 34 g, or 3P-V: 59 g

*Items with asterisk (*) are made-to-order products.

PCV Pipe Cupla with PlugPCV Pipe Cupla with Plug (With Identification Ring)• Specify the plug type (SP-V, SP-V-GN), the body material and seal material when ordering.
• The Loctite (medium strength 242) is used as standard for the plug mounting
adhesive. Should you require other adhesive or method such as a thread sealtape, please specify.

• When several refrigerants are used on the production line simultaneously,
PCV Cupla with colored rings are available for visual recognition and to
distinguish the seal material used.

With 2P-V

With 3P-V

With CR seal

Blue Ring

With HNBR seal

Red Ring

Elbow types are also available.

PCV Pipe Cupla with a Water Drain Hole in the Sleeve
When a PCV Pipe Cupla is used in a water tank for leak test, a Cupla with awater drain hole in the Sleeve is available as a made-to-order product. Water
can be drained from the
Cupla easily.

10For Connection to Copper Pipes

Pipe Cupla PCVH Type

Lever shape has been changed for smooth
operation. Clamps directly on a straightcopper pipe eliminating unnecessary
welding or flaring. Double seal construction
withstands a vacuum of up to 1.3 × 10-1 Pa.

• The same specifications as the PCV Pipe Cupla.
Please refer to the specifications of PCV Pipe Cupla (Page 9).
• Withstands a vacuum of up to 1.3 x 10-1 Pa {1 x 10-3 mmHg}(when connected) making it possible to be used in leak test,
vacuum suction and refrigerant charge.
• Select from three standard types of seal materials to be usedwith fluids for air conditioner and refrigerator production lines.
Many models to suit various pipe sizes.
• One lever operation simultaneously clamps and seals pipe.
Double seal construction for tight fit on end and outside surfaceof pipe ensures excellent sealing and vacuum resistance.

Pipe Cupla PCVH Type with Plug
Lever shape has been changed from curled to straight for smooth operation.
CurledStraight

The PCVH type with plug is available on request as in the case of
PCV Pipe Cupla with plug. Please see Page 10.

Pipe Cupla PCVH Type with Plug (With Identification Ring)
The PCVH Type with identification ring will be handled as in the case of
PCV Pipe Cupla with plug when requested. Please see page 10.

Wide variations of end configurations; 1/4”, 3/8” and blind plug.
Double seal design for tight fit on
both end and outside of pipe.
Standard seal materials fluoro rubber (FKM), hydrogenatednitrile rubber (HNBR) and chloroprene rubber (CR) to suit
air conditioner and refrigerator production lines.

Hydrogenated nitrile rubber (HNBR) is coloredin blue for easy recognition.

One lever operation simultaneously clamps and seals pipe.

For exclusive use on straight copper pipes.
Many models to cover various pipe sizes.

The above photos are for PCVH800.

Triple Seal Version of PCV Pipe Cupla

Pipe Cupla PCV-W TypeA triple seal structure is employed, one at
the end of pipe and two on the outside ofpipe. Highly effective for airtightness andvacuum holding.

Specifications
The same specifications as the PCV Pipe Cupla.
Please refer to the specifications of PCV Pipe Cupla (Page 9).

Dimensions
The same dimensions as the PCV Pipe Cupla.
Please refer to the dimensions of PCV Pipe Cupla (Page 10).

11

Triple Seal Structure

For Connection to Male Thread

Screw Cupla PCS TypeBy pushing the Screw Cupla direct to the malethread for connection improves operating
efficiency. Built-in Ball lock sleeve preventsaccidental disconnection, ensuring safe operation.
• The models listed below can be connected directly to UNF thread.
• Simply push the Cupla onto the thread. The safety design ensures an instantand secure grip on the thread with the locking claws upon connection.
• Sleeve lock mechanism prevents accidental disconnection.
• Employing a three-terraced-shape lip packing enables more stable seal
performance opposed to conventional packing and O-rings.
• Hydrogenated nitrile rubber (HNBR) is colored in blue for easy recognition.
• Time-consuming screw tightening work is eliminated, resulting in reduced
connection time.

Screw Cupla PCS Type with Plug
The Screw Cupla PCS Type with Plug is available on request as in the case of
PCV Pipe Cupla with Plug including identification ring. Please refer to Page 10.

Specifications
Body material

Steel (Partly Stainless Steel and Brass)
For 7/16-20UNF, 5/8-18UNF, 3/4-16UNF,

Counterpart Size

7/8-14UNF, and 1-1/16-14UNS

Working pressure

3.0 MPa, 31 kgf/cm2, 30 bar, 345 PSI

Seal material
Working temperature range

Seal material

Mark

Chloroprene rubber

CR (C308)−20˚C to +80˚C

Hydrogenatednitrile rubber

HNBR (H708)−20˚C to +120˚C

Working temperature range

Models and Dimensions (WAF : WAF stands for width across flats.)
SocketApplication

L

R

A

T2

B

D

F
E

1.6

B

T
H

C

UNF thread: Pursuant to JIS B 8607

Product
Group

External thread Modelfor connection

PCS-7U

7/16-20UNF

PCS-10U

5/8-18UNF

PCS-12U

3/4-16UNF

PCS-14U

7/8-14UNF

PCS-17U

1 1/16-14UNS

Application

PCS-7U-2
PCS-7U-3
PCS-10U-2
PCS-10U-3
PCS-12U-2
PCS-12U-3
PCS-14U-2
PCS-14U-3

Rc 1/4Rc 3/8Rc 1/4Rc 3/8Rc 1/4Rc 3/8Rc 1/4Rc 3/8PCS-17U-3

Rc 3/8Dimensions (mm)
L

øD

øB

H (WAF)

55

28

4

Hex. 19

7

Hex. 21

63

34

71.5

40

75.5

43

75

51

7
10
7
10
11

Hex. 24
Hex. 27
Hex. 35

UNF thread dimensions (mm)
T
R 1/4
R 3/8
R 1/4
R 3/8
R 1/4
R 3/8
R 1/4
R 3/8
R 3/8

High Pressure Version of Screw Cupla PCS Type

Screw Cupla PCS-HP TypeSuits for refrigerants that require high pressure.
By pushing the Screw Cupla direct to the malethread for connection improves operating efficiency.
• Can be connected directly to UNF thread.

øE

øF

R

B

C

øA

T2

5.5

9.2

45˚ to 46˚

3.7

7.6 or more

4.8

7/16-20UNF

8

13.5

45˚ to 46˚

4.8

9.2 or more

7

5/8-18UNF

11

16

45˚ to 46˚

5.5

11.3 or more

10

3/4-16UNF

13.5

19

45˚ to 46˚6

13.9 or more

12.5

7/8-14UNF

18

24

45˚ to 46˚6

17.4 or more

16

1 1/16-14UNS

Specifications
Body material
Counterpart Size
Working pressure
Seal material
Working temperature range

Steel (Partly Stainless Steel and Brass)
For 7/16-20UNF, 5/8-18UNF, 3/4-16UNF,
7/8-14UNF, and 11/16-14UNS
4.5 MPa, 46 kgf/cm2, 45 bar, 653 PSI
Seal material

Mark

Working temperature range

Chloroprene rubber

CR (C308)−20˚C to +80˚C

Hydrogenatednitrile rubber

HNBR (H708)−20˚C to +120˚C

Dimensions
The same dimensions as the Screw Cupla PCS type.
Please refer to the dimensions of the Screw Cupla PCS type.

Note: When considering using the Screw Cupla PCS Type or PCS-HP Type, refer to the outside diameter of the above Cuplas and verify if the Cupla can be connected to the UNF external thread without any interference.

12

For Charging Industrial Gases and Refrigerants

Charge Cupla CS TypeFrequent connection and disconnection underpressure can be easily made with the uniquelever operation. Perfect for charging
refrigerant, vacuum suction, and discharging
residual pressure.

A general rule for identification• A Charge Cupla with CR seal :The body and grip are coated with blue
colored anodic oxidized alumina.
• A Charge Cupla with HNBR seal :The body and grip are coated with redcolored anodic oxidized alumina.
• Please contact us should you require anyother color.

• Equipped with an automatic shut-off valve. Fluid in the passage
is prevented from flowing out when disconnected.
• The Charge Cupla and Plug can be connected or disconnectedeven when the residual pressure remains. The shut-off valve
can be opened or closed with the lever on the back end.
• The safety design prevents the valve from opening even if the lever isoperated without connecting to the plug.
• The lever can be set to any position within the 360 degrees.
• The CS type can be connected to the standard 2P-V and 3-PV Plugs.
The CS-GN type is also available for the 2P-V-GN and 3P-V-GN Plugs on request.
• Hydrogenated nitrile rubber (HNBR) is colored in blue for easy recognition.
• The Charge Cupla that employs a double O-Ring seal structure for highairtightness is also available on request.

How to UseConnection to Plug
Pull the sleeve lever and push in the plug for connection.
Raising the lever on the back end to 90° L-shape opens
the shut-off valves of the Charge Cupla and Plug to allow
the fluid to flow.

Specifications
Body material

Stainless Steel (Partly Aluminum and Brass)

Size (Thread)

1/4"

Working pressure

3.0 MPa, 31 kgf/cm2, 30 bar, 435 PSI

Seal material
Working temperature range

3
2

Seal material

Mark

Working temperature range

Chloroprene rubber

CR (C308)−20˚C to +80˚C

Hydrogenatednitrile rubber

HNBR (H708)−20˚C to +120˚C

1Disconnection of Plug
1

Min. Cross-Sectional Area (mm2)Model

CS-2S-V × 2P-V

CS-3S-V × 3P-V

Min. cross-sectional area

17

44

The plug can be easily disconnected by lowering the leveron the back end to the horizontal position and pulling thesleeve lever. The shut-off valves of the Charge Cupla andPlug close instantly to stop the fluid to flow.

3

Combined Overall Length (mm)Model

CS-2S-V × 2P-V

CS-3S-V × 3P-V

Combined Overall Length

245.5

250.5

2

Models and Dimensions
Socket

H

T

T

13

L

Dimensions (mm)ModelConnecting Plug

L

øH

T

CS-2S-V

2P-V

232.5

42

Rc 1/4CS-3S-V

3P-V

235.5

42

Rc 1/4

Note: No lubricant is applied to HNBR O-ring in the socket. Please apply refrigerant oil to O-ring before use.

Suits for Refrigerants That Require High Pressure

Charge Cupla CS-HP TypeSuits for refrigerants that require high pressure.
High pressure version of the CS type. Frequentconnection and disconnection under pressure
can be easily made with the unique lever
operation.

A general rule for identification• A Charge Cupla with CR seal :The body and grip are coated with blue
colored anodic oxidized alumina.
• A Charge Cupla with HNBR seal :The body and grip are coated with redcolored anodic oxidized alumina.
• Please contact us should you require anyother color.

• Equipped with an automatic shut-off valve. Fluid in the passage
is prevented from flowing out when disconnected.
• The Charge Cupla and Plug can be connected or disconnectedeven when the residual pressure remains. The shut-off valve
can be opened or closed with the lever on the back end.
• The safety design prevents the valve from opening even if the lever isoperated without connecting to the plug.
• The lever can be set to any position within the 360 degrees.
• The CS-HP type can be connected to the standard 2P-V, 3P-V, and 4P-V Plugs.
The CS-HP-GN type is also available for the 2P-V-GN, 3P-V-GN, and 4P-V-GN
Plugs on request.
• The Charge Cupla that employs a double O-Ring seal structure for highairtightness is also available on request.

How to UseConnection to Plug
Pull the sleeve lever and push in the plug for connection.
Raising the lever on the back end to 90° L-shape opens
the shut-off valves of the Charge Cupla and Plug to allow
the fluid to flow.

Specifications
Body material

Stainless Steel (Partly Aluminum and Brass)

Size (Thread)

1/4", 1/2"

Working pressure

4.5 MPa, 46 kgf/cm2, 45 bar, 653 PSI

Seal material
Working temperature range

3
2

Seal material

Mark

Working temperature range

Chloroprene rubber

CR (C308)−20˚C to +80˚C

Hydrogenatednitrile rubber

HNBR (H708)−20˚C to +120˚C

1Disconnection of Plug
1

Min. Cross-Sectional Area (mm2)CS-2S-V-HP × 2P-V CS-3S-V-HP × 3P-V CS-4S-V-HP × 4P-V

Model

44

17

Min. cross-sectional area

The plug can be easily disconnected by lowering the leveron the back end to the horizontal position and pulling thesleeve lever. The shut-off valves of the Charge Cupla andPlug close instantly to stop the fluid to flow.

71

3

Combined Overall Length (mm)CS-2S-V-HP × 2P-V CS-3S-V-HP × 3P-V CS-4S-V-HP × 4P-V

Model
Combined Overall Length

267

263

2

297

Models and Dimensions
Socket

H

T

MARK

T

Dimensions (mm)ModelConnecting Plug

L

øH

T

CS-2S-V-HP

2P-V

250

43

Rc 1/4CS-3S-V-HP

3P-V

252

43

Rc 1/4CS-4S-V-HP

4P-V

273

50

Rc 1/2

Note: No lubricant is applied to HNBR O-ring in the socket. Please apply refrigerant oil to O-ring before use.

L

14

For charging Industrial Gases and Refrigerants

Charge Cupla

CNR Type/LRP TypeCNR Type

Easy disconnection from the plug by lifting thelever to discharge the residual pressure.
Perfect for charging refrigerant, vacuum
suction, and connection/disconnection underresidual pressure.

• Equipped with an automatic shut-off valve. Fluid in the passage is prevented from flowing out
when disconnected.
• The Charge Cupla and Plug can be connected or disconnected even when the residual pressure
remains. The shut-off valve can be opened or closed with the lever on the back.
• Employs a double O-ring sealing structure for high air-tightness upon connection.
• The safety design prevents the valve from opening even if the lever is operated without connecting
to the plug.
• Easy disconnection from the plug by lifting the lever to discharge the residual pressure after
charging is complete.
• The CNR type can be connected to the standard 3P-V and 4-PV Plugs, and the LRP type to thestandard 2P-V Plug. The CNR-GN type is also available for the 3P-V-GN and 4P-V-GN Plugs,
and LRP-GN type for the 2P-V-GN Plug on request.
• Hydrogenated nitrile rubber (HNBR) is colored in blue for easy recognition.

LRP Type

How to UseConnection to Plug
Pull the sleeve on the Charge Cupla and insert the plug into the Charge Cupla foreasy connection.

1
2

Specifications
Body material

Stainless Steel (Partly Aluminum and Brass)

Size (Thread)

1/4", 3/8", 1/2"

Working pressure
Seal material
Working temperature range

Lowering the lever opens
the valve to allow
1
fluid flow.

4.5 MPa, 46 kgf/cm2, 45 bar, 653 PSI
Seal material

Mark

Working temperature range

Chloroprene rubber

CR (C308)−20˚C to +80˚C

Hydrogenatednitrile rubber

HNBR (H708)−20˚C to +120˚C

Min. Cross-Sectional Area (mm2)Model

CNR-3S × 3P-V

CNR-4S × 4P-V

LRP-2S × 2P-V

Min. cross-sectional area

44

62

17

2

Disconnection of Plug
Lifting the lever discharges the remaining pressure between the valves in the Charge Cupla
and plug. The plug can then be easily disconnected by pulling the sleeve on the Charge Cupla.
Upon disconnection the valves
in both sides close
the flow passage
2
instantly to prevent
1
fluid from flowing out.

3

Combined Overall Length (mm)Model

CNR-3S × 3P-V

CNR-4S × 4P-V

LRP-2S × 2P-V

Combined Overall Length

136

161

110
Prior to connecting/disconnecting the plug, reduce the fluid pressure below 1.0 MPa. The lever will springback when pulled back with pressure remaining inside. Be careful not to get your fingers caught in the Cupla.

Models and Dimensions (WAF : WAF stands for width across flats.)
SocketCNR Type

LRP Type

T

L1
L

H

15

D

D

W

W

T

L1
L

H

Dimensions (mm)ModelConnecting
Plug

L

L1

øD

W

H (WAF)T

CNR-3S

3P-V

135

121

35

(48)

24

Rc 3/8

CNR-4S

4P-V

161

145

45

(54)

32

Rc 1/2Dimensions (mm)ModelConnecting
Plug

L

L1

øD

W

H (WAF)T

LRP-2S-V

2P-V

123

96

33

(42)

17

Rc 1/4

Note: No lubricant is applied to HNBR O-ring in the socket. Please apply refrigerant oil to O-ring before use.

For Charging Industrial Gases and Refrigerants

Airless Charge Cupla

CNA Type

The Airless valve structure minimizes air
ingress on connection and fluid spillage on
disconnection. Perfect for charging refrigerant,
vacuum suction, and connection/disconnection
under residual pressure.
• A special airless valve structure is employed in both socket and plug. This
minimizes air ingress on connection and fluid spillage on disconnection.
(CNA-GN Type is also available on request.)• The Airless Charge Cupla and Plug can be connected or disconnected evenwhen the residual pressure remains. The airless shut-off valve can be opened
or closed with the lever on the back.
• The safety design prevents the valve from opening even if the lever isoperated without connecting to the plug.

How to Use

Specifications
Body material

Stainless Steel (Partly Aluminum and Brass)

Size (Thread)

3/8"

Working pressure

Connection to Plug
Pull the sleeve on the Charge Cupla and insert the plug for easy connection.
Lowering thelever opens the valve to allow fluid flow.

3.0 MPa, 31 kgf/cm2, 30 bar, 435 PSI

Seal material

Seal material

Mark

Working temperature range

Working temperature range

Hydrogenatednitrile rubber

HNBR (H708)−20˚C to +120˚C

1
2

Min. Cross-Sectional Area (mm2)Model

CNA-3S-V × CNA-3P-V

Min. cross-sectional area

31.5

1
2

Combined Overall Length (mm)Model

CNA-3S-V × CNA-3P-V

Combined Overall Length111

Disconnection of Plug
The plug can be easily disconnected by lifting the lever and pulling the sleeve on
the Charge Cupla. Upon disconnection the valves in both sides close the flow
passage instantly to prevent fluid from flowing out.

123Models and Dimensions (WAF : WAF stands for width across flats.)
SocketPlugT

Application

CNA-3S-V

R 3/8

L

L1

H

Model

H

D

W

T

L

Dimensions (mm)
L

L1

øD

W

H (WAF)

T

114

103

38

(48)

23

Rc 3/8

Model

Application

CNA-3P-V

R 3/8

Dimensions (mm)L

H (WAF)

T

43

Hex. 23

Rc 3/816

Air-driven Mechanism for Plug Disconnection

Auto Cupla ACV Type

Automatic Plug Disconnection Type.
Contributes to energy and labor saving on the
production line.
Simply push the Plug into the Auto Cupla forconnection.
• Air-driven mechanism is employed in the Auto Cupla to disconnect the plug.
For an emergency, manual disconnection is possible. An automatic shut-off
valve in the Auto Cupla prevents fluid from spilling on disconnection.
• The ACV type can be connected to the standard 2P-V and 3P-V Plugs.
The ACV-GN type is also available for the 2P-V-GN and 3P-V-GN Plugs onrequest.
• Hydrogenated nitrile rubber (HNBR) is colored in blue for easy recognition.

A general rule for identification• An Auto Cupla with CR seal:
The body is coated with blue colored anodic oxidized alumina.
• An Auto Cupla with HNBR seal:
The body is coated with red colored anodic oxidized alumina.
• Please contact us should you require any other color.

Auto Cupla is connected
to PlugSpecifications
Body material

Stainless Steel (Partly Aluminum and Brass)

Size (Thread)

1/4", 3/8"

Working pressure

3.0 MPa, 31 kgf/cm2, 30 bar, 435 PSI

Seal material

Seal material

Mark

Working temperature range

Chloroprene rubber

CR (C308)−20˚C to +80˚C

Hydrogenatednitrile rubber

HNBR (H708)−20˚C to +120˚C

Nitrile rubber

NBR (SG)−20˚C to +80˚C

Working temperature range

Maximum Cupla Inner
Pressure for Air Operation

When Disconnecting
Plug

How to UseConnection to Plug
Simply push the plug into the Auto Cupla for connection.

1.0 MPa, 10 kgf/cm2, 10 bar, 142 PSI

Models and Dimensions (WAF : WAF stands for width across flats.)
Upon connection, the valves in the Auto Cupla and plug open instantly to allow
the fluid flow.

SocketDisconnection of Plug
Prior to disconnecting the plug, reduce the fluid pressure below 1.0 MPa(10 kgf/cm2). The plug can be automatically disconnected by applying air
pressure of 0.5 to 0.6 MPa (5 to 6 kgf/cm2) to section A.

T

Section A

D

T1

Disconnection of Plug for an emergency

H

The plug can be easily disconnected by pulling the front side sleeve in the
direction of the arrow.

L

17

Model

Connecting Plug

ACV-2S
ACV-3S

Dimensions (mm)LøD

H (WAF)

T

T1

2P-V

100

42

19

Rc 1/8Rc 1/4

3P-V

96

45

21

Rc 1/8Rc 3/8

Note: No lubricant is applied to HNBR O-ring in the socket. Please apply refrigerant oil to O-ring before use.

Air-driven Mechanism for Plug Disconnection (High Pressure Version)

Auto Cupla ACV-HP TypeSuits for refrigerants that require high pressure.
High pressure version of the ACV type.
Automatic Plug Disconnection Type.
Contributes to energy and labor saving on the
production line.
• Simply push the plug into the Auto Cupla for connection.
• Air-driven mechanism is employed in the Auto Cupla to disconnect the plug.
For an emergency, manual disconnection is possible.
• An automatic shut-off valve in the Auto Cupla prevents fluid from spillingon disconnection.
• The ACV-HP type can be connected to the standard 2P-V and 3P-V Plugs.
The ACV-HP-GN type is also available for the 2P-V-GN and 3P-V-GN Plugson request.

A general rule for identification• An Auto Cupla with CR seal:
The body is coated with blue colored anodic oxidized alumina.
• An Auto Cupla with HNBR seal:
The body is coated with red colored anodic oxidized alumina.
• Please contact us should you require any other color.

Auto Cupla is connected
to PlugSpecifications
Body material

Stainless Steel (Partly Aluminum and Brass)

Size (Thread)

1/4", 3/8"

Working pressure

4.5 MPa, 46 kgf/cm2, 45 bar, 653 PSI

Seal material
Working temperature range

How to Use

Seal material

Mark

Working temperature range

Chloroprene rubber

CR (C308)−20˚C to +80˚C

Hydrogenatednitrile rubber

HNBR (H708)−20˚C to +120˚C

Maximum Cupla Inner
Pressure for Air Operation

When Disconnecting
Plug

Connection to Plug
Simply push the plug into the Auto Cupla for connection.

1.0 MPa, 10 kgf/cm2, 10 bar, 142 PSI

Models and Dimensions (WAF : WAF stands for width across flats.)
Upon connection, the valve in the Auto Cupla and plug open instantly to allow
the fluid flow.

SocketDisconnection of Plug
Prior to disconnecting the plug, reduce the fluid pressure below 1.0 MPa(10 kgf/cm2). The plug can be automatically disconnected by applying air
pressure of 0.5 to 0.6 MPa (5 to 6 kgf/cm2) to section A.

T

Section A

D

T1

Disconnection of Plug for an emergency

H

The plug can be easily disconnected by pulling the front side sleeve in the
direction of the arrow.

L

Model

Connecting Plug

ACV-2S-HP
ACV-3S-HP

Dimensions (mm)LøD

H (WAF)

T

T1

2P-V

100

42

19

Rc 1/8Rc 1/4

3P-V

96

45

21

Rc 1/8Rc 3/8

Note: No lubricant is applied to HNBR O-ring in the socket. Please apply refrigerant oil to O-ring before use.

18

Air-driven Mechanism for Valve Opening / Closing and Plug Disconnection

Auto Cupla AC Type

Auto Cupla automatically opens and closes thevalve, and disconnects the plug.
Contributes to energy and labor saving on the
production line.
• Air-driven mechanism is employed in the Auto Cupla to connect anddisconnect the plug and to open and close the valve.
• An automatic shut-off valve in the Auto Cupla prevents fluid from spilling on
disconnection.
• The unique air-driven mechanism reduces the load when the plug is connectedto the Auto Cupla.
• The Auto Cupla and Plug can be connected or disconnected even when theresidual pressure remains.
• The safety design prevents the valve from opening even if the valve isoperated to open with air-driven mechanism without connecting to the plug.
• The AC type can be connected to the standard 2P-V and 3P-V Plugs.
The AC-GN type is also available for the 2P-V-GN and 3P-V-GN Plugs on request.
• Hydrogenated nitrile rubber (HNBR) is colored in blue for easy recognition.

A general rule for identification• An Auto Cupla with CR or NBR seal:
The body is coated with blue colored anodic
oxidized alumina.
• An Auto Cupla with HNBR seal:
The body is coated with red colored anodic
oxidized alumina.
• Please contact us should you require any other color.

Auto Cupla is connected
to PlugSpecifications
Body material

Stainless Steel (Partly Aluminum and Brass)

Size (Thread)

1/4", 3/8"

Working pressure

3.0 MPa, 31 kgf/cm2, 30 bar, 435 PSI

Seal material

Seal material

Mark

Working temperature range

Chloroprene rubber

CR (C308)−20˚C to +80˚C

Hydrogenatednitrile rubber

HNBR (H708)−20˚C to +120˚C

Nitrile rubber

NBR (SG)−20˚C to +80˚C

Working temperature range

When opening and closing the valve
Maximum Cupla Inner
Pressure for Air Operation
When disconnecting the plug

1.0 MPa, 10 kgf/cm2, 10 bar, 145 PSI
1.0 MPa, 10 kgf/cm2, 10 bar, 145 PSI

How to UseConnection to PlugThe balls in the Auto Cupla become loose by applying air pressure of 0.5 to
0.6 MPa (5 to 6 kgf/cm2) to section A. The plug can then be easily inserted.
Completely inserting the plug into the Auto Cupla and reducing the pressure
on section A to 0 MPa will lock the Auto Cupla and plug and complete theconnection. (* The valve is not open in this state.)
Section A: Compressed Air

Models and Dimensions (WAF : WAF stands for width across flats.)
SocketT2(Air port for valve opening and closing)Opening and Closing the Valve
Prior to operating the valve, reduce the fluid pressure below 1.0 MPa(10 kgf/cm2). The valves in the
Section B: Compressed Air
Auto Cupla and plug open by applying
air pressure of 0.5 to 0.6 MPa(5 to 6 kgf/cm2) to section B.
By reducing the air pressure
on section B to 0 MPa,
the valves in the Auto Cupla
Section B Pressure: 0 MPa
and plug close thereby
stopping the fluid flow.

T3(Air port for disconnection with the plug)

T1

Disconnection of Plug
D

Prior to disconnecting the plug, reduce the fluid pressure below 1.0 MPa(10 kgf/cm2). The plug can be disconnected by applying air pressure of 0.5 to
0.6 MPa (5 to 6 kgf/cm2) to section A after reducing the air pressure on section
B to 0 MPa.
Section B Pressure: 0 MPa
Section A: Compressed Air

L

H

19

Model

Connecting Plug

AC-2S
AC-3S

Dimensions (mm)LøD

H (WAF)

2P-V

155

44

Hex. 17 Rc 1/4

Rc 1/8 Rc 1/8

3P-V

173

55

Hex. 21 Rc 3/8

Rc 1/8 Rc 1/8

T1

T2

T3

Auto Cupla ACS TypeThe ACS type, which can be connected to the plugby simply pushing the plug into the Auto Cupla,is also available on request.

Note: No lubricant is applied to HNBR O-ring in the socket. Please apply refrigerant oil to O-ring before use.

Air-driven Mechanism for Valve Opening / Closing
and Plug Disconnection (High Pressure Version)

Auto Cupla AC-HP TypeSuits for refrigerants that require high pressure.
High pressure version of the AC type.
Auto Cupla automatically opens and closes thevalve and disconnects the plug.
Contributes to energy and labor saving on the
production line.
• Air-driven mechanism is employed in the Auto Cupla to connect anddisconnect the plug and to open and close the valve.
• An automatic shut-off valve in the Auto Cupla prevents fluid from spilling on
disconnection.
• The unique air-driven mechanism reduces the load when the plug isconnected to the Auto Cupla.
• The Auto Cupla and Plug can be connected or disconnected even when theresidual pressure remains.
• The safety design prevents the valve from opening even if the valve isoperated to open with air-driven mechanism without connecting to the plug.
• The AC-HP type can be connected to the standard 3P-V Plug.
The AC-HP-GN type is also available for the 3P-V-GN Plug on request.

Auto Cupla is connected
to PlugSpecifications
Body material

Stainless Steel (Partly Aluminum and Brass)

Size (Thread)

3/8"

Working pressure

How to UseConnection to Plug

4.5 MPa, 46 kgf/cm2, 45 bar, 653 PSI

Seal material

Seal material

Mark

Working temperature range

Working temperature range

Hydrogenatednitrile rubber

HNBR (H708)−20˚C to +120˚C

When opening and closing the valve 1.0 MPa, 10 kgf/cm2, 10 bar, 145 PSI
Maximum Cupla Inner
Pressure for Air Operation
1.0 MPa, 10 kgf/cm2, 10 bar, 145 PSIWhen disconnecting the plug

The balls in the Auto Cupla become loose by applying air pressure of 0.5 to
0.6 MPa (5 to 6 kgf/cm2) to section A. The plug can then be easily inserted.
Completely inserting the plug into the Auto Cupla and reducing the pressure
on section A to 0 MPa will lock the Auto Cupla and plug and complete theconnection. (* The valve is not open in this state.)
Section A: Compressed Air

Models and Dimensions (WAF : WAF stands for width across flats.)
SocketOpening and Closing the Valve
Prior to operating the valve, reduce the fluid pressure below 1.0 MPa(10 kgf/cm2). The valves in the Auto Cupla and plug open by applying air
pressure of 0.5 to 0.6 MPa (5 to 6 kgf/cm2) to section B. By reducing the airpressure on section B to
Section B: Compressed Air
0 MPa, the valves in the
Auto Cupla and plug close
thereby stopping
the fluid flow.
T2(Air port for valve opening and closing)

T3(Air port for disconnection with the plug)

Section B Pressure: 0 MPa

D

T1

MARK

H

Disconnection of Plug
Prior to disconnecting the plug, reduce the fluid pressure below 1.0 MPa(10 kgf/cm2). The plug can be disconnected by applying air pressure of 0.5 to
0.6 MPa (5 to 6 kgf/cm2) to section A after reducing the air pressure on section
B to 0 MPa.
Section B Pressure: 0 MPa
Section A: Compressed Air

L

Model

Connecting Plug

AC-3S-HP

3P-V

Dimensions (mm)
T1

L

øD

H (WAF)

176

65

Hex. 21 Rc 3/8

T2

T3

Rc 1/8 Rc 1/8

Note: No lubricant is applied to HNBR O-ring in the socket. Please apply refrigerant oil to O-ring before use.

20

Screw-on Type Cupla

Screw Cupla NCF Type
Screws on to the male unified thread easily.
Made up of the nut and body.
The bearing in the Screw Cupla makes rotationof the nut smooth and reduces damage to thethree-terraced-shape lip packing.
• Employing a three-terraced-shape lip packing enables more stable seal
performance opposed to conventional packing and O-rings.
• Withstands a vacuum of up to 1.3 x 10-1Pa (1 x 10-3 mmHg) (when connected)
making it possible to be used in leak test, vacuum suction and refrigerant
charge.
• Select from two standard types of seal materials to be used with fluids for
air conditioner and refrigerator production lines. Many models available tosuit various thread sizes.
• The nut shape is changed for visual recognition of the seal material used in
the Screw Cupla.

Three-terraced-shape lip packing
Hydrogenated nitrile rubber (HNBR) is colored in blue for easy recognition.

Three-terraced-shape
lip packing

Specifications
Identification of the seal material by the Appearance of the Nut

Body material

Stainless steel

Size

For unified thread

Working pressure

4.5 MPa, 46 kgf/cm2, 45 bar, 653 PSI

Seal material
Working temperature range

Seal material

Mark

Working temperature range

Chloroprene rubber

CR (C308)−20˚C to +80˚C

Hydrogenatednitrile rubber

HNBR (H708)−20˚C to +120˚C

CR seal is used.

HNBR seal is used.

Models and Dimensions (WAF : WAF stands for width across flats.)

When considering using the Screw Cupla NCF Type, refer to the external dimensions of the Cuplas below and verify if the Cupla can be connected to the unified external threads without any interference.

SocketWork for connection

t

F
E

B

B

H

L

Model

External threadfor connection

NCF-7U

7/16-20UNF

NCF-10U

5/8-18UNF

NCF-12U

3/4-16UNF(t)

NCF-14U

7/8-14UNF

NCF-17U

1 1/16-14UNS

R
T2

A

1.6

D

T

C

Unified thread: Pursuant to JIS B 8607

Model
NCF-7U-2
NCF-7U-3
NCF-10U-2
NCF-10U-3
NCF-12U-2
NCF-12U-3
NCF-14U-2
NCF-14U-3
NCF-17U-2
NCF-17U-3

Dimensions (mm)L

D (WAF)

øB

H (WAF)

44

Hex. 27 × ø29

4.2

Hex. 1746

Hex. 27 × ø29

8Hex. 1948

Hex. 27 × ø29

10Hex. 2151

Hex. 32 × ø35

50

Hex. 35 × ø39

7
10
7
10

Hex. 24
Hex. 29

Unified thread dimensions (mm)
T
R 1/4
R 3/8
R 1/4
R 3/8
R 1/4
R 3/8
R 1/4
R 3/8
R 1/4
R 3/8

øE

øF

R

B

C

øA

T2

5.5

9.2

45˚ to 46˚

3.7

7.6 or more

4.8

7/16-20UNF

8

13.5

45˚ to 46˚

4.8

9.2 or more

7

5/8-18UNF

11

16

45˚ to 46˚

5.5

11.3 or more

10

3/4-16UNF

13.5

19

45˚ to 46˚6

13.9 or more

12.5

7/8-14UNF

18

24

45˚ to 46˚6

17.4 or more

16

1 1/16-14UNS

Screw Cupla NCF Type with Plug

NCF Cupla with Plug (With Identification Ring)• Specify the plug type (SP-V, SP-V-GN), the body material and seal material
when ordering.
• The Loctite (medium strength 242) is used as standard for the plug mounting adhesive.
Should you require other adhesive or method such as thread seal tape, please specify.

• When several refrigerants are used on the production line simultaneously,
Screw Cupla with colored rings are available for visual recognition and to
distinguish the seal material used.

With 2P-V

Elbow types are also available.

With CR seal

With HNBR seal

With 3P-V
Blue Ring

21* Following types are available on request: Long adapter type, 45 degree elbow type, types with round knurled nut, small outer diameter nut or O-ring seal.

Red Ring

Pipe Cupla Series
The Pipe Cuplas have been developed for production lines of refrigeration, air conditioning,
and automotive industries, and for maintenance services for these products.
Connecting the Cuplas directly to various types of pipes greatly contributes
to enhance productivity, labor-saving, and automation in the production lines.

Connects to various types of pipes and fittings (see the examples below)
Applications
For Charging Work
Straight Pipes

Flared Pipes

Bulged Pipes for Heaters

Flare Nuts

For Pressure Resistance Test
For Leak Test

Expanded Pipes

Bulged Pipes
for Fuel for Engines

Bulged Pipes for Radiators

Unified Thread Fittings

For Vacuum Suction Test
For Running Test

Swaged Pipes

Spool Pipes for Fuel

Hose Barbs

Union Adapters

When Considering to Use Pipe Cuplas• All Pipe Cuplas are made-to-order products that will be designed based on the specifications of customer’s work presented by the customer.
• When considering to use Pipe Cuplas, please let us know the following points: pressure, name of fluid, end configuration of Cupla, usage
condition, and application, etc.
• All Pipe Cuplas are designed based on the specifications of customer’s work. Therefore, it is essential for us to receive the drawing of thework and the work sample from the customer.

22Chuck Lock System for Expanded Pipes
and Bulged Pipes

Pipe Cupla PCHS TypeA special chuck lock system is employed toreduce lock scratches and improve pressure
resistance.
Suits for high pressure use.
• Simply push pipes into the Pipe Cupla for connection.
• Locking the outer surface of pipe with the special collet chuck
reduces lock scratches and improves pressure resistance.
• A model with sleeve stopper mechanism is also available on request.
It prevents accidental disconnection after connecting the Pipe Cupla
to pipes.

Applications
Charging Work
Pressure Resistance Test
Leak Test

For Expanded Pipes

Pipe Cupla PCB TypeSuits for connection and disconnection withexpanded pipes and spool pipes.
Easy to handle with the ball lock system using
sleeve operation.
• Connects directly to pipes.
• Employs a ball lock system to grip on the outer surface of pipe.
• A model equipped with automatic shut-off valve or sleeve lock mechanism
to prevent accidental disconnection is available on request.

Applications
Charging Work
Pressure Resistance Test
Leak Test
Vacuum Suction Test

23

For Bulged Pipes and Spool Pipes

Pipe Cupla PCBW TypeSuits for connection and disconnection withbulged pipes and spool pipes.
Resistance to bending forces and vibration isincreased by employing a double-row ball locksystem.
• Simply push pipes into the Pipe Cupla for connection.
• Employs a double-row ball lock system to grip on theouter surface of pipe securely and to increase resistanceto bending forces and vibration.
• A model equipped with automatic shut-off valve or sleevelock mechanism to prevent accidental disconnection isavailable on request.

Applications
Charging Work
Pressure Resistance Test
Leak Test

For Bulged Pipes and Spool Pipes

Pipe Cupla PCP Type
Employs a plastic chuck that scarcely
scratches pipes.
Great workability with lighter weight.
• Simply push pipes into the Pipe Cupla for connection.
• A plastic chuck scarcely scratches pipes.
• Improves workability with lighter weight.

Applications
Charging Work
Pressure Resistance Test
Leak Test

24

For Straight Pipes

Pipe Cupla PCBL TypeSuits for connection and disconnection withstraight pipes.
Employs a ball lock system to grip on the outersurface of pipe. Improved connection anddisconnection with lever operation.
• Connects directly to straight pipes.
• A ball lock system grips on the outer surface of pipe.
• Employs a lever operation system for easy connection
and disconnection.
• Employs an aluminum body to lighten the weight
and to improve workability.
• Particularly suitable for refrigerator assembly lines.

Applications
Charging Work
Pressure Resistance Test
Leak Test
Vacuum Suction Test

For Straight Pipes

Pipe Cupla PCLB TypeSuits for connection and disconnection withstraight pipes.
Employs a ball lock system to grip on the outersurface of pipe.
One-handed lever operation facilitates easy
connection and disconnection with pipes.
• Connects directly to straight pipes.
• A ball lock system grips on the outer surface of pipe.

Applications
Charging Work
Pressure Resistance Test
Leak Test

25

For Straight Pipes

PCV Type Cupla

with Residual Pressure
Release Device
Equipped with the residual pressure releasedevice. Lever operation releases the residualpressure for easy disconnection.
• Made up of PCV Type Cupla and the residual pressure
release device.
• Raising the lever of the residual pressure releasedevice releases the residual pressure for easy
pipe disconnection.
• Suits for refrigerants that require highpressure.

Close
Open (Residual pressure release)

Applications
Charging Work
Pressure Resistance Test
Leak Test

For Pipes with Fittings

Pipe Cupla PCB TypeSuits for connection and disconnection withpipe fittings.
A ball lock system grips on the rear of the hex.
nut of pipe fitting upon connection.
• Connects directly to pipe fittings.
• Simply push pipes into the Pipe Cupla for connection. The balls in the
Pipe Cupla grip on the rear of the hex. nut of pipe fitting upon connection.

Applications
Charging Work
Pressure Resistance Test
Leak Test

26

For Straight Pipes and Pipes with Blind Rubber Plugs

Pipe Cupla PCW TypeSuits for connection and disconnection withstraight pipes and pipes with blind rubber plugs.
Frequent connection and disconnection can beeasily made with the unique lever operation.
• Connects directly to pipes.
• Unique lock design on pipes allows some slight variations in pipe dimensions.

Applications
Charging Work
Pressure Resistance Test
Leak Test

For Large Diameter Straight Pipes

Pipe Cupla PCA TypeSuits for connection and disconnection withlarge diameter straight pipes.
Employs a special chuck lock system.
High pressure resistant version is also available
on request.
• Connects directly to large diameter straight pipes.
• Employs a special chuck lock system to grip on the outer surface of pipe.

Applications
Charging Work
Pressure Resistance Test
Leak Test
Vacuum Suction Test

27

For Special Pipes

Pipe Cupla PCD Type
Simply push the Pipe Cupla
onto pipe fittings.
Unique locking mechanism
provides outstanding pressure
resistance and air-tightness.
• Applicable to pipes with a wide variety of fittings.
• A special clamp locks the outer surface of pipe.
• A model equipped with sleeve lock mechanism to prevent accidental
disconnection is available on request.

Applications
Charging work
Pressure Resistance Test
Leak Test
Vacuum Suction Test

High Pressure Type for Spool Pipes

Pipe Cupla PCH TypeSuits for connection and disconnection withspool pipes.
A special chuck lock system reduces lockscratches and improves pressure resistance.
• Simply push spool pipes into the Pipe Cupla for connection.
• A special chuck lock system is employed to reduce lock scratches andimprove pressure resistance.
• A model equipped with sleeve lock mechanism to prevent accidental
disconnection is available on request.

Applications
Charging Work
Pressure Resistance Test
Leak Test

28

Screw-in Type Cupla

Screw Cupla PCSI TypeBy pushing the Screw Cupla direct to thefemale thread for connection improves
operating efficiency.
• Connects directly to the female thread.
• Simply push the Screw Cupla into the female thread.
The safety design ensures an instant and secure grip on thethread with the locking claws upon connection.
• Time-consuming screw tightening work is eliminated,
resulting in reduced connection time.

Applications
Charging Work
Pressure Resistance Test
Leak Test

For Locking at the Leading End of Workpiece from the Inside

Pipe Cupla PCBI Type
Employs balls to lock at the leading end of
workpiece from the inside.
Greatly improves workability.
• Simply push the back end of the Pipe Cupla toward the workpiece forconnection. The balls in the Pipe Cupla lock at the leading end of theworkpiece from the inside upon connection.
• Internal pressure is utilized to enhance the sealing performance between
the Pipe Cupla and workpiece.
• Time-consuming connection work is eliminated.

Applications
Charging Work
Pressure Resistance Test
Leak Test

29

For Locking at the Leading End of Workpiece from the Inside

Pipe Cupla PCI Type

Employs chucks to lock at the leading end of
workpiece from the inside.
Greatly improves workability.
• Simply push the back end of the Pipe Cupla toward the workpiece forconnection. The chucks in the Pipe Cupla securely lock at the leading
end of the workpiece from the inside upon connection.
• Internal pressure is utilized to enhance the sealing performance between
the Pipe Cupla and workpiece.
• Time-consuming connection work is eliminated.

Applications
Charging Work
Pressure Resistance Test
Leak Test

For Pipe Inner Wall Lock

Pipe Cupla PCIF Type
Employs chucks to grip on the inner wall of pipe.
Suitable for applications with a small amountof clearance.
• Moving the lever of the Pipe Cupla horizontally completes connection with the pipe.
• Pushing the rod shaped part of the Pipe Cupla into the inside of pipe andmoving the lever horizontally activates the chucks to grip on the inner wall ofpipe securely.
• Lever operation seals the fluid passage at the inner wall and the leading
end of pipe.
• Time-consuming connection work is eliminated.

Applications
Charging Work
Pressure Resistance Test
Leak Test
Vacuum Suction Test

A PCIF type shown below is available on request.

30

For Automatic Pipe Disconnection

AUTO Cupla APCB Type
Automatic Pipe Disconnection Type.
Contributes to energy and labor saving on the
production line.
• Simply push pipes into the Auto Cupla for connection.
• Air-driven mechanism is employed in the Auto Cupla to disconnect the pipe
automatically.
When an air pressure of 0.5 to 0.6 MPa (5 to 6 kgf/cm2) is applied to section A,
the pipe is automatically disconnected.

Section A

Applications
Charging Work
Pressure Resistance Test
Leak Test

For Refrigerant Charge Valves Used in
Car Air conditioner Production Lines

PCB Type Cupla
for Charge Valves

Quick connection and disconnection withrefrigerant charge valves (JRA2009 standard)
used in car air conditioner
production lines.
• Greatly improve workability in charging refrigerants and vacuum suction.

Applications
Charging Work
Pressure Resistance Test
Leak Test
Vacuum Suction Test
Valve built-in types are alsoavailable on request.

31

For high pressure use

For low pressure use

MEMO

32

Safety Guide
Safety Precautions
The safety precautions provide instructions for the safe use of Nitto Cuplas to avoid the potential danger of bodily harm or damage to surrounding property.
The safety precautions are categorized under the headings Danger, Warning and Caution, in accordance with the degree of potential hazard to the bodyor surrounding property, if the Cuplas are used incorrectly.
They are all important notes for safety and must be followed as well as in accordance with International standards #1 and other local safety regulations #2.
#1: ISO 4413, Hydraulic Fluid Power – General rules relating to systems
ISO 4414, Pneumatic Fluid Power – General rules relating to systems#2: Industrial Health & Safety law (for example)

DANGER

Indicates an imminently hazardous situation
which, if not avoided, will result in death orserious injury.

WARNING

Indicates a potentially hazardous situation
which, if not avoided, could result in deathor serious injury.

CAUTION

Indicates a potentially hazardous situation
which, if not avoided, may result in personal
injury or property damage.

DANGER
Stop using the Cupla immediately if there is any anticipated danger ofoperation or reduced safety.

WARNINGThe enclosed safety precautions are only a guideline. When using Nitto
Cuplas, you are requested to pay particular attention to possible hazardous
situations for the application which are not stated in the safety precautions.

Safety Guide for Refrigeration, Automotive and Air Conditioning Cupla Series

WARNING• Do not use Cuplas continuously exceeding the rated working pressure.
• Only use Cuplas within the range of the rated temperature. Otherwise the seal may get damaged or deteriorate and cause leakage.
• Do not apply any excessive impact, bend or tension more than is necessary to connect or disconnect Cuplas. It may cause leakage or damage.
• Do not connect or disconnect Cuplas while they are pressurized or residual pressure remains.
• Do not disassemble Cuplas.

CAUTION• Use a thread sealant on the male taper pipe thread to ensure no leakage.
• The fluid to be used must be compatible with the body and seal material of Cupla.
• Only use Cuplas as quick connecting fluid couplings.
• Only use Cuplas with a combination of Nitto Cuplas.
• Do not use Cuplas in a place where dust or metal dust gets in. It may cause malfunction or leakage.
• May cause malfunction or leakage if paint sticks to Cuplas.
• Install a shut-off valve between the pressure source and Cuplas.
• Do not use Cuplas as a swivel joint.
• Do not connect Cuplas directly to a vibrating or impact device. It may result in reduced lifetime.
• Selecting the wrong type of seal material may cause leakage. In making your selection, check the compatibility of seal and body material with the type of
fluid and temperature. As to the use of any special paint or solvent, make thoroughly sure of the material compatibility.
• In cleaning Cuplas, do so in a manner that will not affect the seal and body materials of Cuplas.
• Do not drop Cuplas. It may reduce the performance of the Cuplas.
• Do not use Cuplas continuously at the lowest or highest working temperature.
• Do not exceed the recommended maximum torque when screwing in to the male or female thread of a Cupla for installation. It may cause damage.
• Do not apply any excessive bending, tension or rotation to Cuplas. It may cause leakage or damage.
• Dirt, scratches or damages on the sealing surface may cause leakage.
• The inclusion of foreign matter in the fluid to be used may cause malfunction. Fluid must be cleaned through filters before reaching to Cuplas.
• Do not strike the tip of an automatic shut-off valve with a hammer or a similar tool. It may cause leakage or malfunction. Consult us for an alternative way of
releasing the residual pressure.
• Put a Nitto genuine dust cap on the plug after disconnection when there is a possibility of dirt sticking to the plug seal surface.
• Do not exceed the recommended maximum torque when screwing in to the male or female thread of a Cupla for installation. It may cause thread damage.
• As a rule no lubricant is applied to the H.NBR O-ring in the socket prior to shipment. Apply refrigerant oil to the O-ring before use.
• Make sure that there is no burr, deformation and foreign matter on and around the end and insertion port of the pipes before connecting pipes to the Cuplas.
• After connection, try to pull the Cupla and pipe apart to check secure connection.
• When in storage or not in use, do not keep the Cupla levers turned down.
• Be sure to make the connection/disconnection tests and leakage test after having done maintenance on Cuplas.
• Safety precautions differ depending on the types of Cuplas. For further details contact us.
• The dimensions of pipes to be connected with the Cupla must be the ones drawn on drawings, specification sheets, etc.

33

Safety Guide
Caution When Selecting Cuplas
DANGER• Connection to a coupling of another brand may cause imperfect connection or disconnection, reduced air tightness, impaired pressure resistance or durability, reduced flow rate
and potentially result in an unexpected accident and therefore must be avoided. Nitto Kohki cannot accept liability for any accident that may result by mixed use with the couplingof another brand. Please be sure to check for our marks on the right side, which are always inscribed on Nitto Kohki Cupla products, when you order and purchase.
• Do not use Cuplas under conditions and environments other than specified in the catalog.

Markings

WARNING• Please consult us prior to use if Cuplas are required for use on machines, equipment or systems (hereafter referred to as “equipment, systems, etc.”) for sustaining or controllinghuman life or body.
• When Cuplas are used for the purpose of ensuring safety, please consult us beforehand.
• The compatibility of the product with specific equipment, systems, etc. must be determined by the person designing the equipment, systems, etc. or the person who decides
its specifications based on necessary analysis and test result. The expected performance and safety assurance of the equipment, systems, etc. will be the responsibility of theperson who has determined its compatibility with the product.
• If Cuplas are to be used for the following applications, please consult us:- Vehicles, aircraft and associated equipment systems that accommodate people- Medical facilities or suction equipment that directly affects human body
- Equipment that directly comes into contact with and runs food, drugs or medicines, drinking water, atomic energy equipment or equipment that ensures safety.
• Selecting the wrong type of seal material may cause a leak. In making your selection, please check the compatibility of the seal material with the type of fluid and temperatureused in the application.
• Please consult us prior to selection or use of Cuplas when they are intended for use with corrosive or flammable gases/liquids and/or in atmospheres of these types of gases and liquids.

Warranty and Disclaimer
Our responsibilities for the defects in our products shall be as follows:• We shall be responsible for any defects in design, material or workmanship of our products, if it is apparent that such defects are due to reasons solely attributable to us.
• Our responsibilities shall be limited to one of the following, as determined by us:(a) repair of any defective products or parts thereof,(b) replacement of any defective products or parts thereof; or(c) compensation for loss and damages incurred by you, which shall in no case exceed the amount of your purchase price for the defective products.
• We shall in no case be liable for any special, indirect or consequential loss or damages, whether such loss or damages are those arising from work stoppage, impairment of other goods or death or personal injury.

Performance, Dimensions and Its Limitation
Please note the performance charts and outside dimensions in this catalog do not take into account any tolerances found in mass production.
The information is an average, to be a guide for selecting models and to enable technical appraisal by users.

Beware of Imitations
Recently, similar products which invite misidentification or confusion with Nitto Kohki Cuplas have appeared on the market.
Connection with such a similar product to a Nitto Kohki Cupla may cause:
1. Imperfect connection or disconnection
2. Reduced air tightness
3. Impaired pressure resistance or durability
4. Reduced flow rateand could result in unexpected accidents.
Therefore, connection other than with a Nitto Kohki Cupla must be avoided.
Please be sure to check for our original marks on the right hand side of this page, which are always inscribed on Nitto Kohki Cupla products, when you order and purchase.

Note: Nitto Kohki cannot accept any liability for any accident that may occur as a result of using couplings of another brand in conjunction with our own.

Caution for Custom-made Cuplas
Custom-made Cuplas are products designed and produced based on the specifications presented by the customer.
Prior to actual production, technical documentation presented by us (drawings, specification sheets, etc.) shall be exchanged and approved by the customer.
For the use of the product, the customer shall check the safety and the full compatibility with the equipment used by evaluating its performance thoroughly, under actual operating conditions.
We shall in no case be liable for any loss or damage if the Cupla is used outside the conditions and specifications set out in the original technical documentation.

Caution for Storing Cuplas• Store Cuplas in a place where no dust or foreign matter gets in. If fluid flows while the dust or foreign matter is present inside Cuplas, the dust or foreign matter may go into the equipment connectedto the Cupla and may cause malfunction.
• Store Cuplas indoors away from water or moisture.
• Store Cuplas in a shaded, dry and well-ventilated place.
• Do not to drop Cuplas. It will deform or damage Cuplas.
• If Cuplas are stored or not being used for a long period of time, check their appearance, function and performance before use.

34

Special order / Custom-made Cuplas contributing tolabor-saving and productivity enhancement in all industries(Here are some of the application examples.)35

Leak Test on Large-sized Air Conditioner Pipes

Helium Leak Test on Car Air Conditioners

Pressure Resistance and Leak Test on Special Pipes

Helium Leak Test on Condensers

Helium Leak Test on Car Air Conditioners

Helium Leak Test on Car Air Conditioners

Helium Leak Test on Car Air Conditioners

Helium Leak Test on Heat Exchangers

Helium Leak Test on Heat Exchangers

Engine Bench Test

Helium Leak Test on Package Air Conditioners

Helium Leak Test on Condensers

From Development to Production, Management and Marketing of “Cuplas”
Nitto Kohki has introduced the “integrated product assurance system” that can respond promptly to “users’ requirements”
by covering the range of development, quality control, production and marketing in order to ensure supply of high-performancehigh-quality “Cuplas”.

Research and Development

Headquarters and R & D Laboratory

The needs of the time and the latest information aregathered and analyzed, and unique technology is utilized tothe challenge for ceaseless development of better Cuplas,
Cuplas that suggest new applications.

Quality Control
The careful selection of materials, painstaking pursuit of machining precision, and strict surveillance
process such as severe endurance tests have earned trust for our Cuplas as a global brand.

Production
High-grade, rationalized, and integrated production system extends from the machining of parts tothe assembly and testing of completed products. Robots that we make ourselves for our own plants
and many other state-of-the-art facilities that cannot be seen elsewhere have marvelous capacity formass production. And with them all, we aim to be an establishment of a flexible supply system.

Marketing
Meticulous marketing activities include advertising in the general industrial press and specialist
papers, national and local exhibitions, training sessions, catalogs, promotion videos, otherpresentation tools and technical data sheets for new launches, and unique yet dynamic campaigns,
etc.

Production Facilities That Assure Our Product Quality
Production Facilities Assure Flexible Supply System
Large scale production facilities in Tochigi Prefecture, Japan and Ayutthaya, Thailand, having the capability of flexible mass production,
are in full operation around the clock and constitute a complete high-grade supply system, from the machining of components to theassembly and testing of finished products, that is forever ready and able to respond to our user’s reliance.
TOCHIGI NITTO KOHKI CO., LTD.

NITTO KOHKI INDUSTRY (THAILAND) CO., LTD.

36

Nitto Kohki's Laborsaving Products
Nitto Kohki is capturing the needs of users by introducing to the world not only “Cuplas” quick connect couplings, but also nextgeneration laborsaving devices, including various “machine tools and hand tools”, high precision “Delvo” electric screwdrivers,
and linear-motor-driven piston “compressors/vacuum pumps”.

Machines and Tools

Machines and Tools to Achieve Energy and Labor Savings in Processing Work
Machines and tools are used at various processing sites for such work as cutting, polishing, scaling, drilling and chamfering of steel materials. We have created a product line up ofpneumatic, electric and hydraulic machines and tools to match the diversification of processing methods and the conditions of work operations.

Linear37

High Precision “Delvo” Electric Screwdrivers
for Professional Use

Compressors, Vacuum Pumps
and Their Applied Products

NITTO KOHKI "delvo" Electric Screwdrivers are high-quality tools for professional use,with special emphasis on precise control of torque and long life. They apply just thecorrect amount of torque –with sure, positive control always at your fingertips. They aresmooth and shockless in operation, too.

MEDO pumps are unique products featuring a linear-motor-driven free piston system.
NITTO KOHKI has made available a complete series of air compressors and suction
pumps that incorporate this uniquely functional design. These are quite appropriate as
air sources or suction power units for various pneumatically operated equipment andapparatus in advanced industries.

MEMO

38

Refrigeration, Automotive &Air Conditioning Cupla Series

NITTO KOHKI CO., LTD.
Head Office9-4, Nakaikegami 2-chome, Ohta-ku, Tokyo 146-8555, Japan
Tel : +81-3-3755-1111
Fax : +81-3-3753-8791
E-mail : overseas@nitto-kohki.co.jp
Web www.nitto-kohki.co.jp/eOverseas Affiliates / Offices
NITTO KOHKI U.S.A., INC.
46 Chancellor Drive, Roselle, Illinois 60172, U.S.A.
For Cuplas
Tel : +1-630-924-5959
Fax : +1-630-924-1174
For Machine Tools
Tel : +1-630-924-9393
Fax : +1-630-924-0303
www.nittokohki.com
NITTO KOHKI EUROPE CO., LTD.
Unit A5, Langham Park Industrial Estate, Maple Road,
Castle Donington, Derbyshire DE74 2UT, United Kingdom
Tel : +44-1332-653800
Fax : +44-1332-987273
www.nitto-kohki.eu/en
NITTO KOHKI DEUTSCHLAND GMBH
Gottlieb-Daimler-Str. 10, 71144 Steinenbronn, Germany
Tel : +49-7157-989555-0 Fax : +49-7157-989555-40
www.nitto-kohki.eu/de
NITTO KOHKI AUSTRALIA PTY LTD
77 Brandl Street, Eight Mile Plains, Queensland 4113, Australia
Tel : +61-7-3340-4600
Fax : +61-73340-4640
www.nitto-australia.com.au
NITTO KOHKI (SHANGHAI) CO., LTD.
Room1506, Suite C, Orient International Plaza,No.85 Loushanguan Road, Shanghai 200336, China
Tel : +86-21-6415-3935 Fax : +86-21-6472-6957
www.nitto-kohki.cn

NITTO KOHKI (SHANGHAI) CO., LTD. Shenzhen Branch
2005C Shenzhen ICC Tower, Fuhuasanlu 168,
Futian District, Shenzhen, Guangdong 518048, China
Tel : +86-755-8375-2185 Fax : +86-755-8375-2187
www.nitto-kohki.cn
NITTO KOHKI CO., LTD. Singapore Branch
10 Ubi Crescent #01-62, Ubi Techpark Lobby D, Singapore 408564
Tel : +65-6227-5360
Fax : +65-6227-0192
www.nitto-kohki.co.jp/e/nksb/index.html
NITTO KOHKI CO., LTD. Bangkok Representative Office
M&A Business Center, Q-House Convent Bldg.,
38 Convent Rd., Silom, Bangrak, Bangkok 10500, Thailand
Tel : +66-2632-0307
Fax : +66-2632-0308
www.nittobkk.com
NITTO KOHKI CO., LTD. India Liaison Office
3rd Floor, Building No.9-A DLF Cyber City, Phase-III,
Gurgaon, Haryana 122002, India
Tel : +91-124-454-5031 Fax : +65-6227-0192
NITTO KOHKI CO., LTD. Mexico Representative Office
OF1109 Torre Corporativo 1 Piso 11 Central Park Armando Birlain Shaffler#2001 Col Centro Sur, Queretaro, Qro, C.P. 76090, MexicoTel : +52-442-290-1234

ISO 9001

JQA-2025

Couplings Division

ISO 14001
ISO 9001
ISO 14001

JQA-EM4057

NITTO KOHKI CO., LTD.

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This catalog is printed using environmentally friendly paper and vegetable oil inks.

Specifications and designs are subject to change at any time without notice.

Printed in Japan

16IV005- 1