CATALOG No. 6015

PRESSURE GAUGEACCESSORIESThe types and sizes of accessories required to install gauges
vary according to specific gauge applications. Introduced here afull variety of gauge accessories by Asahi which virtually may
meet almost all gauge application requirements. Please selectaccessories best suited to specific gauge applications to gain
the best performance from the gauge to be mounted.

Accessory Designation

Connection Sizes
Accessory Symbols
Types of Connections

Code No.

Accessories

Code No.

Size２

１/４TypesJ

Fixed joint３３/８１

G male screwPP flange

４

１/２

２

G female screw

UJUnion joint

３

R male screw

PJ

Pipe joint

４

R female screw

SSiphonTypes of Materials

５

Pipe end（weldment）

LB

10MPa tank siphon

Code No. Names of Materials

７Flange

HB

50MPa tank siphon

B

Brass

D

Dampener

S

Steel

GB

Gauge saver

U

Stainless steel

GRL

Gauge saver

GRH

Gauge saver

C

Gauge cockV

Gauge valve

Code No.

ASAHI GAUGE MFG. CO.,LTD.
J A PA NGauge Cocks:
Used to temporarily shut off thepressure medium when the gauge
is dismounted for maintenancethen remounted. Recommended
for relatively low-pressure media(less than 2MPa).

Gauge Valves:
Is of needle type allowing to be
used over an entire range of pressures.

２１V、２３V

Joints:A kind of adapter joints used toconnect gauges to pressure medium intakes. Comes in various sizes
and shapes to meet application
requirements.

P Flanges, Flanged Joints
Flange sizes are available in compliance with JIS, ANSI and JPJ.

Siphon Pipes:
Used to radiate heat from thepressure medium, thereby protecting the gauge against unusuallyhigh heat.

Tank Siphons:
Just like siphon pipes, these are akind of heat radiating tools, doubling as separators used in an oilfree water tanks.

Dampeners:
Variable throttle devices used
where pulsation is encountered.

Gauge Savers:
Prevents gauge damage due tosharp unusual pressure rise.

P Devices:A special type of throttle devices
used to protect diaphragm-sealpressure gauges against heavypulsation.

1

GAUGE COCKS
Specifications
Pressure limit:
2MPa
Max. test pressure: 3MPaUse:
Liquid lessthan 100°C
Materials:
Brass,
Stainless steel50ModelBS

d１×d２

φ543LMG D1L×M

G ／８×G ／８ （１３） １６７６２４×２８G１／２×G１／２ （１４） １６７６２６×３０７６２４×２８（１４） １６７６２６×３０

G３／８×G３／８ （１３） ２２７６２６×３０４４２１C−U３３３３

１１G ／８×R ／８ （１３） １６G ／２×R ／２

１１４４G ／２×G ／２ （１４） ２２７８２６×３０

２３C−U３３

G３／８×R３／８ （１３） ２２７６２６×３０７８２６×３０

3f2

11f２４４２３C−B３３2343f１３２１C−B３３G D2SUS３４４

１１G ／２×R ／２ （１４） ２２Stainless SteelBrass

GAUGE VALVES
Specifications
Pressure limit:
50MPa
Max. test pressure: 70MPa
Use:
Liquid lessthan 200°C
Materials:
Stainless steel

Model
d１×d２

f

L×M

２１V−U３３

G３／８×G３／８

１６２６×３０４４

G１／２×G１／２

１８２６×３０SUS

G D1

MAX.65

φ65

G D2
12３

３２３V−U３３G ／８×R ／８

１６２６×３０

４４

G１／２×R１／２

１８２６×３０１

１８２６×３０

２３V−U４９１

G ／２×NPT ／２

26×30

φ5

R D2
NPT D2

２１V、
２３Vf3f86

ExampleUnion Joint

The above-shown connection can beachieved by selecting an appropriate joint.

2

JOINTSModel

G d1SUS

２１Ｊ−Ｂ２３２１Ｊ−Ｕ２３

G１／４×G３／８２４２４G１／４×G１／２

３２３２

G３／８×G１／４

３４３４G３／８×G１／２

４２

４２

G１／２×G１／４

４３

４３

G１／２×G３／８

H
φ5G d2

２０４０

１６３８

１８４０

１６３４１８３６２４G１／４×R１／２

２０３８

３２

３２

G３／８×R１／４

１６３６３３３３

G３／８×R３／８

１８３８３４３４G３／８×R１／２

２０４０４２４２

G１／２×R１／４

１６３８

４３４３

G１／２×R３／８

１８４０４４４４G１／２×R１／２２０４２

４１Ｊ−Ｂ２２

４１Ｊ−Ｕ２２

R１／４×G１／４

１６３４２３２３R１／４×G３／８

１８３６２４２４R１／４×G１／２２０３８３２３２

R３／８×G１／４

１６４０３３３３

R３／８×G３／８

１８３８３４３４

R３／８×G１／２２０４０４２４２

R１／２×G１／４

１６３８４３４３

R１／２×G３／８

１８４０４４４４

R１／２×G１／２

２０４２

４３Ｊ−Ｂ２３４３Ｊ−Ｕ２３

R１／４×R３／８

１８３６２４２４R１／４×R１／２２０３８３２３２

R３／８×R１／４

１６３６３４３４R３／８×R１／２２０４０４２４２

R１／２×R１／４

１６３８４３４３

R１／２×R３／８

１８４０H
f2
Hf2
3H

f1
f2

ModelBS

d１×d２

１４

１６１８

１４

１６１８

１４
１６１８

f１

f２

H

１６６６

１８６８

G１／４×G１／４

２３２３

G１／４×G３／８

２４２４

G１／４×G１／２

２０７０

３２

３２

G３／８×G１／４

１６６８

３３

３３

G３／８×G３／８

１８

７０

３４３４

G３／８×G１／２

２０７２

f2

４２

４２

G１／２×G１／４

１６７０４３４３

G１／２×G３／８

１８

７２

４４４４

G１／２×G１／２

２０７４２３ＵＪ-Ｂ２２ ２３ＵＪ-Ｕ２２

G１／４×R１／４

１６６６２３２３G１／４×R３／８

１８６８２４２４G１／４×R１／２２０７０３２３２G３／８×R１／４

１６６８

３３３３G３／８×R３／８

１８７０３４３４G３／８×R１／２２０７２４２４２G１／２×R１／４

１６７０４３４３G１／２×R３／８

１８７２４４４４G１／２×R１／２

２０７４

f1

２１ＵＪ-Ｂ２２ ２１ＵＪ-Ｕ２２

HFemale union × Male Joint
L2×M2

φ5f2

G d2

R d2

L１×M２

１４２４×２８２６×３０
１９×２２２４×２８２６×３０
１９×２２２４×２８２６×３０２４×２８２６×３０L２×M２

１６１８１４１６１８

１９×２２
１９×２２２４×２８２６×３０
１９×２２２４×２８２４×２８２６×３０
１９×２２２６×３０２４×２８２６×３０
１９×２２

１９×２２２４×２８２６×３０
１９×２２２４×２８

２４×２８
２６×３０
１９×２２２６×３０• Special joints other than listed above are available upon request.

• Special Profile Examples

3L１×M１

SUS

3

G d1

３６２４

R d2
L1×M1

３８

１６

G ／４×R ／４

G d2
R d1

１３６２０G１／４×R３／８

φ5L1×M1

１８１８２３f1

R d1１６H

２３Ｊ−Ｕ２２R d2
L1×M1

１４f２２３G d1

Female × Male Joint

１f１

２３Ｊ−Ｂ２２

f1

L1×M1

d１×d２

BSf1

L1×M1

f2

Materials: Brass, Stainless steel

3Specifications

Female-Male Joint

Male-Female Joint

Female Union-SW

Female Union Joint

２２J

１１J２５UJ

２４UJ

２４×２８
２６×３０

P Flanges, Flanged Joints□ 7P ― □□FF

□ 7P ― □□FTF□ 7P ― □□GF

φC1
φC3

T
f3

f3

TF

□ 7P ― □□φC2
φC4n-φhn-φhφg
PCD.C

PCD.C
φDφDMF□ 7P ― □□MF (F)PCD.Cn-φhT
n-φhPCD.C
φDφD２７UPJ ― □□φC4
φgf3

φC3f3

TF

□ 7P ― □□□P Flange and Flanged Joint DesignationGdL×M

HExample: P Device, RF type, JIS10k, 15A
flange, connection screw G 3/8,material SUS

T

１８n-φhφDF

１６G １/２

φg
PCD.C

F

１４G ３/８

n-φhf

G １/４

φDfT

FPCD.C

Connection Screw

RFConnection Screw

T• In addition to the above, R andNP screws are available.
• Flange sizes are available incompliance with JIS, ANSI andJPJ.

FSpecifications

2 7P − U 3 JIS １０k １５ R F

PCD.C
φDn-φhFlange type
Connection screw size
MaterialsdfH

L×M

G３／８

１６４０２４×２８

G１／２

１８４２２６×３０• The above H dimensions are forstandard specifications, and other H
dimensions are available upon request.
• In addition to P flanges, RF, TF, GF, MF
and MF(F) flanges are available.

Connection screw
standard
PF female.................... 2
3/8 ............................... 3
PT female.................... 4
Stainless
Steel............................U
Brass...........................B
1/2 ............................... 4Flanged joint JIS20k40AGF flange Connection
screw PF1/2 Material SUS

27UPJ − U 4 JIS 20k 40 GF

4SIPHON PIPESSpecifications

形 番ModelPressure limit:
20MPa
Max. test pressure: 24MPa
Use:
Liquid lessthan 350°C
Materials:
Steel,
Stainless steel

d１×d２

SSSUS

２１Ｓ−Ｓ３３

２１Ｓ−Ｕ３３

G３／８×G３／８

２３Ｓ−Ｓ３３

２３Ｓ−Ｕ３３

G３／８×R３／８

２１Ｓ−Ｓ４４

２１Ｓ−Ｕ４４

G１／２×G１／２

２３Ｓ−Ｓ４４

２３Ｓ−Ｕ４４

G１／２×R１／２

L×M

G d1f２H

L×M

１６１８２３６２４×２８１８２０２３８２４×２８* Siphon pipes are primarily
used in measuring steampressures.
Before use, fill the siphon
with water to safeguard thegauge.

R d1

fIn addition to the above, doublesiphon, flanged, L-shape, 1/2Bpipe types are available inspecial specifications.

f１

5

SS will be equipped with a
1/2B pipe.

H

φ7f2

L×M

3

φ5R d2G d2

TANK SIPHON
Specifications
LB

ModelHB

Pressure
limit:
10MPa 50MPa
Max. test
pressure: 12MPa 60MPa
Tank
capacity: 100 cc 80 cc
Use:
Liquid less than 350°C
Materials: Stainless steel

Range

d１×d２L×M

f１

f２

２６×３０

１６１８

DH

６０

１４２５６２０６６０

１４６５６２１０SUS
２１ＬＢ-Ｕ３３

G３／８×G３／８１０MPa

４３ＬＢ-Ｕ３３

R３／８×R３／８

Lessthan

２１ＨＢ-Ｕ３３

G３／８×G３／８

２１ＨＢ-Ｕ３３

R３／８×R３／８
１

１０〜５０MPa

１２１ＬＢ-Ｕ４４

G ／２×G ／２１０MPa

４３ＬＢ-Ｕ４４

R１／２×R１／２

Lessthan１

１２１ＨＢ-Ｕ４４

G ／２×G ／２

４３ＨＢ-Ｕ４４

R１／２×R１／２

L×M

R d1

H

f1

f1

１８

１０〜５０MPa

G d1

φD

２９×３４２０* Tank siphon is primarily used to replace apressure liquid to be measured with other.
Prior to installation, pour liquid through the
top of the tank siphon until the tank is filled
and the liquid begins to flow out of thebottom hole. Next, install the tank siphon ona steam line, the mount the pressure gauge.

3f1

f2

L×M

φ5R d2How high cooling performance a siphon
pipe can provide depends on its diameter,
wall thickness, length, room temperatureand humidity. Shown above is one
example of cooling performanceprovided by a siphon pipe in measuring
steam pressures.

140℃Outlet
180°point
Inlet

140

Roomtemperature
17℃

120
100

Roomtemperature
24℃

4020

Inlet

Inlet

180° 360°Outlet

5After steam
flow hasstabilized

100
80

20 minutes
after steam
flow stated

60
40

Inlet
Steam pipe

Steam pipe℃

120Outlet8060

Tank siphon temperature

Cooling Performance

Siphon pipe temperature

G d2

Midpoint

Outlet

The cooling performance of a tanksiphon is lower than that of asiphon pipe. Shown above is one
example of how high cooling
performance a tank siphon canprovide.

DAMPENERS
Specifications
Materials: Brass,
Stainless steel

ModelPressureLimit

ＢＳ ３５ＭＰａ
ＳＵＳ２０ＭＰａ

d１×d２

BSSUS

２１Ｄ−Ｂ２２

２１Ｄ−Ｕ２２

G１／４×G１／４

２３Ｄ−Ｂ２２

２３Ｄ−Ｕ２２

G１／４×R１／４

２１Ｄ−Ｂ３３

２１Ｄ−Ｕ３３

G３／８×G３／８

２３Ｄ−Ｂ３３

２３Ｄ−Ｕ３３

G３／８×R３／８

２１Ｄ−Ｂ４４

２１Ｄ−Ｕ４４

G１／２×G１／２

２３Ｄ−Ｂ４４

２３Ｄ−Ｕ４４

G１／２×R１／２

ＳＵＳ７０〜１５０ＭＰａ

１f２

H

L×M

１４

１６５０

２７×３１．
２

１６１８５６２７×３１．
２

１８２０５９２７×３１．
２

１８２０６０

３２×３７

f１

f２

１

—

２１ＤＨ−Ｕ４４

G ／２×G ／２—

２３ＤＨ−Ｕ４４G１／２×R１／２
G d13φ5f2f2

H

f1f1

G d1

L×M

f１

G d2

G d2

GAUGE SAVERS
Specifications
Materials: Brass,
Stainless steel

Model

Type

Range

d１×d２

SUS

SUS

GRL

GRH

GBH

２１ＧＲＬ−Ｕ３３

G３／８×G３／８

４３ＧＲＬ−Ｕ３３

R３／８×R３／８

２１ＧＲＬ−Ｕ４４

G１／２×G１／２

４３ＧＲＬ−Ｕ４４

R１／２×R１／２
３１８８２

１８２０８６

１６１８８２

１８２０８６１６１８

１２１１８２０１２３

３

２１ＧＲＨ−Ｕ３３

G ／８×G ／８

４３ＧＲＨ−Ｕ３３

R３／８×R３／８

２１ＧＲＨ−Ｕ４４

G１／２×G１／２

４３ＧＲＨ−Ｕ４４

R１／２×R１／２

２１ＧＢ−Ｕ３３

G３／８×G３／８

４３ＧＢ−Ｕ３３

R３／８×R３／８
１１６０．
３〜５ＭＰａ５．
１〜３０ＭＰａ

５kＰａ〜

１２１ＧＢ−Ｕ４４

G ／２×G ／２

４３ＧＢ−Ｕ４４

R１／２×R１／２

０．
２５ＭＰａ

GRL. GRH
G d1

The Gauge Saver shuts off an excesspressure above the specific scale
range to protect the gauge against
damage due to overload.

APPOX 75

3f2

Hf1

R d1

φ5R d2G d2GRL. GRHGBP DEVICE
The combined use of a glycerin-filled gauge
and a P device provides highly stable
gauge performance against pulsation andmechanical vibration.
The combined use of a diaphragm-sealgauge and a P device is also available.
Glycerin-filledgauge
P device

6

GASKETSφDt

ModelConnection Screw

ＦＬ２

１G ／４

１１

３

G３／８

１４

４

G１／２

１８ＦＢ２

G１／４

１１

３

G３／８

１４

４

G１／２

１８ＦＣ２

G１／４

１１．
５

３

G３／８

１４．
５

４

G１／２

１８．
５

ＦＴ２

G１／４

１１

３

G３／８

１４

４

G１／２

１８ＦＡ２

G１／４

１１３

G３／８

１４

４

G１／２

１８Dt

Materials

２．
５Leather２

Copper

１．
５Asbestos２

Teflon２

Aluminum3Connection Screw

DLA ２

１G ／４

１１

３G３／８

１４．
６４G１／２

１８φDModel

Materials

Stainless Steel

THROTTLE
４×４４×８４S４H
Should the gauge leak gas being
measured from the element, thedevice automatically functions toprevent it from leaking out of thegauge.

Pulsation Test Data
(Dampener Performance Date)

0.6
Pointer deflection (MPa)

Test method:
Install a standard dampener and agauge in parallel. Then plot theminimum and maximum readings.
Pulsation amplitude: 0.4~0.6MPa
Frequency: 4 times/second
Operating oil: machine oil(viscosity 0.36)
Room temperature: 18°C

0.50.4

Type of dampener

Standerd

Worm screw
4×4NOTE) Specifications in this cata-log are subject to change without notice.

4H4SP

Oil-filled type