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YOSHITAKE GP-1000H Pressure Reducing Valve Steam

Made in Japan
Manufacturer: Yoshitake
Model: GP-1000H

  • Maximum inlet pressure: 1.6 MPa
  • Superior durability
  • Stable performance
  • Valve leakage meets ANSI Class IV
  • High reduction ratio (20:1)

Specifications

FeaturesFor steam, Max. 1.6MPa
TypePilot operated piston type
SpecificationsProduct typePilot-operated type
Nominal size15A (1/2″) – 100A (4″)
ApplicationSteam
End connectionJIS 16K FF flanged, ASME Class 300 flanged
Inlet pressure0.1 – 1.6 MPa
Reduced pressure0.05 – 1.4 MPa (*)
Reduced pressure90% or less of the inlet pressure(gauge pressure)
Min. differential pressure0.05 MPa
Max. pressure reduction ratio20 : 1
Working temperatureMax. 220 degree(C)
Valve seat leakage0.01% or less of rated flow
MaterialBodyDuctile cast iron
Valve and valve seatStainless steel
Piston, cylinderStainless steel
DiaphragmStainless steel

Remarks

* Reduced pressure
A: 0.05-0.9 MPa
B: 0.9-1.4 MPa

Dimensions and Weights (JIS 16K FF flanged)

SizeL (mm)H (mm)Weight (kg)Cv value
15A(1/2)1502918.01
20A(3/4)1552918.52.3
25A(1)16030010.04
32A(1 1/4)19033314.06.5
40A(1 1/2)19033314.59
50A(2)22035320.016
65A(2 1/2)24535730.025
80A(3)29040435.036
100A(4)33045052.564

Dimensions and Weights (ASME Class 300 flanged)

SizeL (mm)H (mm)Weight (kg)Cv value
25A(1)16030010.04
32A(1 1/4)18033314.06.5
40A(1 1/2)20033315.59
50A(2)23035321.016
65A(2 1/2)27835730.025
80A(3)31040437.036
100A(4)35045057.064

About flow rate

Please refer to the nominal size selection chart when the inlet pressure is 0.6 MPa or more and the pressure reduction ratio exceeds 10:1.

Find the intersection point of the inlet and reduced pressures. If the intersection point is within range (A) in the chart, the pressures are controllable with a single pressure reducing valve.
They can be controlled by two-stage pressure reduction if the intersection point is within range (B). The valve does not fulfill specified performance in range (C).

[Example 1]

When selecting the nominal size of a pressure reducing valve whose inlet pressure •P ‘), reduced pressure (P2), and steam flow rate are 0.6 MPa. 0.4 MPa, and 800 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 this intersection point to find intersection point (B| with the flow rate of 800 kg/h. Since intersection point (B) lies between nominal sizes 40A and 50A. select the larger one. 50A.

[Example 2]

When selecting the nominal sue of a pressure reducing valve whose pressure (P), reduced pressure (Pz), and steam flow rate are 0.8 MPa. 0.05 MPa. and 600 kg/h. respectively, first find intersection point (C) of the inlet pressure of 0.8 MPa and the diagonal line. Trace down to the left from this diagonal to find intersection point (D) with the reduced pressure of 0.05 MPa. Trace down vertically from intersection point (D) to find intersection point (E) with the flow rate of 600 kg/h. Since intersection point (E) lies between nominal sizes 32A and 40A select the larger one. 40A.

  • Set the safety factor at 80 to 90%.

Dimensional drawing

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