PN25
The Yoshitake GP-1000SS is a pilot-operated pressure reducing valve designed for steam applications. It features stainless steel wetted parts for improved corrosion resistance and a spherical main valve that offers excellent sealability, greatly reducing valve seat leakage (compliant with ANSI Class IV). The GP-1000AS model features all-stainless steel construction.
Specifications
| Model | GP-1000SS | GP-1000AS |
|---|---|---|
| Material | Stainless steel wetted parts | All stainless steel |
| Application | Steam | Steam |
| Inlet Pressure | 0.1-1.0 MPa | 0.1-1.0 MPa |
| Reduced Pressure | 0.05-0.9 MPa | 0.05-0.9 MPa |
| Minimum Differential Pressure | 0.05 MPa | 0.05 MPa |
| Maximum Pressure Reduction Ratio | 20:1 | 20:1 |
| Maximum Temperature | 220°C | 220°C |
| Valve Seat Leakage | 0.01% or less of rated flow | 0.01% or less of rated flow |
| Connection | JIS 10K FF flanged | JIS 10K FF flanged |
Dimensions and Weights
| Nominal Size | L (mm) | H1 (mm) | H (mm) | Weight (kg) |
|---|---|---|---|---|
| 15A | 150 | 67 | 288 (298) | 8.3 (8.5) |
| 20A | 155 | 67 | 288 (298) | 8.8 (9.0) |
| 25A | 160 | 70 | 303 (313) | 10.5 (10.7) |
| 32A | 190 | 85 | 326 (336) | 14.8 (15.0) |
| 40A | 190 | 85 | 326 (336) | 15.3 (15.5) |
| 50A | 220 | 96 | 350 (360) | 20.8 (21.0) |
| 65A | 245 | 103 | 360 (370) | 27.4 (27.6) |
| 80A | 290 | 125 | 407 (417) | 38.8 (39.0) |
| 100A | 330 | 148 | 454 (464) | 54.5 (54.7) |
The values in parentheses are the dimensions and weights of the GP-1000AS.
Operation
The pressure-reducing valve reduces pressure by throttling the valve. The valve is composed of the main valve and main valve seat for throttling, and adjusting spring, diaphragm, pilot valve, and piston for pressure sensing and activation.
Installation Precautions
WARNING
- Because of heavy weight, hold the valve with lifting equipment while piping.
- In case installing a safety valve as a safety device at the outlet side, joint the relief pipe at the outlet of the safety valve and guide it to a safe place where steam can relieve out.
TIP
- Install a strainer (80 mesh) at the valve inlet side.
- Install a pressure gauge at both the inlet and outlet sides of the valve.
- Install a steam trap to the inlet side of the valve to prevent drainage problems.
- When the pressure-reducing ratio is large, install a reducer to keep the flow velocity in the pipe below 30 m/s.
Disassembly and Exploded Drawing
Consumable parts require periodic replacement:
- Diaphragm: 2 years
- Piston ring: 3 years
- Inner ring: 3 years
- Pilot valve assembly: 5 years
- Strainer: 5 years
- Gaskets: 2 years
Yoshitake Control Valves / Pressure Reducing Valves
GP, GD, and CP series for stable pressure reduction and control in steam, water, and air systems.
