PRESSURE REDUCING VALVE

GP-2000Features

1. Large-size diaphragm and external sensing method controlreduced pressure more stably.

2. Since the Cv value is high, flow capability and control capabilityare significantly improved, one or two sizes smaller than theregular nominal size can be applied.

3. Spherical main valve offers great sealability and great reduction ofvalve seat leakage (compliant with ANSI Class IV).

4. Pressure management at low pressure (0.02 MPa or less) ispossible.

Specifications

Dimensions (mm) and Weights (kg)

Nominal size15A20A25A32A40A50A

dRc 1/2Rc 3/4Rc 1Rc 1-1/4Rc 1-1/2Rc 2

L150150160180180230

H1

170170175192192216

H398398404434434498

A200200226226226276

Weight14.014.018.521.521.533.0

Nominal size15A20A25A32A40A50A65A80A

100A125A150A200A

L146 (142)146 (142)156 (152)176 (172)196 (192)222 (218)282 (278)302 (294)342 (330)400 (388)465 (453)469 (469)

H1

170170175192192216251264321321414414

H398398404434434498552575658658814814

A200200226226226276352352401401502502

Weight 15.5 ( 15.3) 16.0 ( 15.8) 21.0 ( 20.6) 24.0 ( 23.6) 24.5 ( 24.1) 36.0 ( 35.8) 64.5 ( 64.2) 71.5 ( 68.8)111.0 (106.9)115.0 (112.0)234.3 (230.0)242.0 (238.0)

Screwed type Flanged type

*1 External sensing is standard. Available with internal sensing type (nominal size: 15A to 100A) in different specifications. Note that Cv valueof internal sensing type is lower than that of external sensing type.

*2 Available with the GP-2000L, reduced pressure of 0.01 to 0.02 MPa, from 15A to 100A, inlet pressure of 0.1 to 0.5 MPa and maximumpressure reduction of 50:1.

･ Available with external pilot type.･ Available with ASME or EN flanged.

GP-2000Steam

External sensing *1

85% or less of inlet pressure (gauge pressure)0.05 MPa

20:1220˚C

0.01% or less of rated flowDuctile cast ironStainless steelStainless steelStainless steelStainless steelStainless steel

Copper pipe 8-2 mJIS 20K RF flanged

ModelApplication

Reduced pressure sensing methodInlet pressure

Reduced pressure

Minimum differential pressureMaximum pressure reduction ratio

Maximum temperatureValve seat leakage

BodyMain valveValve seatPilot valve

Pilot valve seatDiaphragm

Reduced pressure sensing pipeConnection

Material

JIS Rc screwed JIS 10K FF flanged

0.1-2.0 MPa0.02-0.15 MPa *20.1-1.4 MPa

0.1-1.0 MPa0.02-0.15 MPa *20.1-0.85 MPa

● Screwed type

･ Available with NPT connection.

･ The above values in parentheses are the dimensions of JIS 10K FF flanged.

● Flanged type (JIS 20K RF) R 1/4

8 (R 1/4)

d

A

L H1

H

R 1/4

8 (R 1/4)

A

L H1

H

φ

φ

φ

φ

φ

Nominal Sizes Selection Chart (For Steam/External Sensing)

2.01.81.61.41.21.00.80.60.40.2

0 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.40.1

This range requires two-stage pressure reduction.

Controllable range

The valve does not fulfill specified performance in this range.

P1: I

nlet

pre

ssur

e M

Pa

P2: Reduced pressure MPa

[Example]When selecting the nominal size of a pressure reducing valve whose inletpressure (P1), reduced pressure (P2), and flow rate are 0.6 MPa, 0.4 MPa, and600 kg/h, respectively, first find intersection point (a) of the inlet pressure of 0.6 MPa and the reduced pressure of 0.4 MPa. Trace down vertically from thisintersection point to find intersection point (b) with the flow rate of 600 kg/h.Since intersection point (b) lies between nominal sizes 20A and 25A, select thelarger one, 25A.・Set the safety factor at 80 to 90%.

60

80

100

200

300

400

600

800

1000

2000

30004000

60008000

1000020000

3000040000

6000080000

8000060000

4000030000

20000

100008000

6000

40003000

2000

1.4

1.3

1.2

1.1

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

1.4

1.3

1.2

1.1

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

(b)

(a)

15A

20A

25A

32A

40A

50A

65A

80A

100A125A

150A200A

2.01.81.6

1.0

0.9

1.4

1.2

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

Nominal size

P2:

Red

uced

pre

ssur

e M

PaW

: Flo

w ra

te k

g/h

P 2: R

educ

ed p

ress

ure

MPa

W: F

low

rate

kg/

h

P1: Inl

et pr

essu

re M

Pa

Specifications Selection Chart

0 5 50 100%

Setpressure

Shut-off pressure rise (within 0.02 MPa)

Red

uced

pre

ssur

e

Min

imum

adj

usta

ble

flow

rate

Rat

ed fl

ow ra

te

Flow rate

OffsetWithin 10% of set pressure Minimum value: 0.02 MPa

0.160.150.140.130.12

0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0

P2: R

educ

ed p

ress

ure

MPa

P1: Inlet pressure MPa

This chart shows a variation in the reduced pressurewhen the inlet pressure of 1.75 MPa is changedbetween the range from 0.2 MPa to 2.0 MPa with thereduced pressure set at 0.14 MPa.

Flow Characteristic Chart

Pressure Characteristic Chart

P19-02-25-04