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Reducing valve for steam Yoshitake GP-1000AS

Reducing valve for steam Yoshitake GP1000AS
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  • Manufacturer: Yoshitake (Japan)
  • Material: stainless steel, cast stainless steel
  • Action type: pilot operated
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  • Specifications
  • Description
  • Dimensions and weight
  • Chart
  • Delivery and payment
ModelGP-1000SSGP1000AS
ApplicationSteam
Inlet pressure0.1-1.0 MPa
Under pressure0.05-0.9 MPa
Up to 90% of inlet pressure (gauge)
Min. differential pressure0.05 MPa
Max. coeff. pressure reduction20: 1
Maximum temperature220 ° C
Valve seat leaksNot more than 0.01% of nominal flow
MaterialCorpusCast Stainless Steel
Valve, valve seatStainless steel
Plunger, cylinderStainless steel
ConnectionJIS 10K FF Flange Connection

Description of GP-1000 Series model code 

Reducing valve for steam Yoshitake GP-1000AS

Pilot valve plunger-type control for universal use. & nbsp; High reliability with long-term experience.

  1. Improved corrosion resistance when flow passages are made of stainless steel (GP-1000SS) or all parts are made of stainless steel (GP-1000AS).
  2. Spherical master valve provides good sealing and reduced seat leakage (ANSI Class IV).
  3. Meets Japan Society of Heating, Air Conditioning and Sanitary Engineers' Society of Heating, Air Conditioning and Sanitary Engineers SHASE-S106 standard for pressure reducing valves.

GP - 1000 AS

No. sizeLH1HWeight
15A15067288 (298)8.3 (8.5)
20A15567288 (298)8.8 (9,0)
25A16070303 (313)10.5 (10.7)
32A19085326 (336)14.8 (15,0)
40A19085326 (336)15.3 (15.5)
50A22096350 (360)20.8 (21,0)
65A245103360 (370)27.4 (27.6)
80A290125407 (417)38.8 (39.0)
100A330148454 (464)54.5 (54.7)

GP scheme - 1000 SS; 1000 AS

Nominal Sizes Selection Chart (For Steam)

Reducing valve for steam Yoshitake GP-1000AS

[Example 1] When selecting the nominal size of a pressure reducing valve whose inlet pressure (P1), 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 size of a pressure reducing valve whose inlet pressure (P1), reduced pressure (P2), 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 intersection point 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%.

Specifications Selection Chart

Reducing valve for steam Yoshitake GP-1000AS

Find the intersection point of the inlet and reduced pressures. If the intersection point is within any of the ranges shown in the chart above, the pressures are controllable.
Range (A) and (C): GP-1000 Series except GP-1002 and 1012
Range (B) and (C): GP-1002 and 1012

Corrected Cv value

Reducing valve for steam Yoshitake GP-1000AS

Example Take a pressure reducing valve whose inlet pressure is 0.8 MPa, the reduced pressure is 0.05 MPa. Find the inlet and reduced pressure intersection point (A) at the above chart, then draw a horizontal line in the leftward direction to point (B) which indicates a correction coefficient of 0.85. For a nominal size of 25A, the corrected Cv value would be calculated as follows: 4 (rated Cv value) 0.85 (correction coefficient) = 3.4

Specifications Selection Chart

Reducing valve for steam Yoshitake GP-1000AS

Pressure Characteristic Chart

Reducing valve for steam Yoshitake GP-1000AS

This chart shows variation in reduced pressure when the inlet pressure of 1.0 MPa is changed between 0.3 MPa and 1.0 MPa while the reduced pressure is set at 0.1 MPa.

Loading Air Pressure-set Pressure Chart

Reducing valve for steam Yoshitake GP-1000AS

Basically, the set pressure to the loading air pressure is as shown on the left. The set pressure is slightly different depending on the conditions. For the actual use, adjust the loading air pressure suitable for necessary set pressure.

Set pressure of safety valve for alarm use at the outlet side of the pressure reducing valve for steam

Set pressure of pressure reducing valve (MPa)Set pressure of safety valve (MPa)
0.1 or lessSet pressure of the pressure reducing valve + 0.05 or more
0,11-0,4Set pressure of the pressure reducing valve + 0.08 or more
0,41-0,6Set pressure of the pressure reducing valve + 0.1 or more
0,61-0,8Set pressure of the pressure reducing valve + 0.12 or more
More than 0.8Set pressure of the pressure reducing valve + 15%

When a safety valve is installed for alarm use at the outlet side of a pressure reducing valve for steam and there are no laws or regulations specified to comply with, select a safety valve whose blowout capacity is around 10% of the maximum flow rate of the pressure reducing valve.

GP-1000 Flow Rate Table

Reducing valve for steam Yoshitake GP-1000AS

When the inlet pressure is more than 0.7 MPa and the pressure reduction ratio is more than 10:1, calculate the corrected Cv value multiplying the rated Cv value by the correction factor C obtained from Fig.1.

Delivery

  • Pickup from a warehouse in Kiev - is free
  • New Mail - at the rates of the delivery service, at the rates of the delivery service, at the rates of the delivery service
  • SAT - at the rates of the delivery service
  • Deliveri - at the rates of the delivery service

Payment

  • Cashless payment with VAT
  • Online Privat24, Visa / MasterCard
Reducing valve for steam Yoshitake GP1000AS

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