- Most suitable for relief valve of a pump in closed circuit
- No leakage when closed due to single seat valve and valve disc
Japan, Yoshitake
YOSHITAKE GD-21 Differential Pressure Regulating Valve
Made in Japan
Manufacturer: Yoshitake
Model: GD-21
Specifications
| Features | For water, differential pressure regulating valve | |
|---|---|---|
| Type | Differential pressure regulating valve | |
| Specifications | Product type | Differential pressure regulating valve |
| Nominal size | 15A (1/2″) – 150A (6″) | |
| Application | Water | |
| End connection | JIS 10K FF flanged | |
| Max. pressure | 0.7 MPa | |
| Working pressure | 0.05 – 0.7 MPa (*) | |
| Working temperature | 5 – 80 degree(C) | |
| Material | Body | Ductile cast iron |
| Valve | NBR | |
| Valve seat | Stainless steel or Bronze | |
| Diaphragm | NBR | |
Remarks
* 15A-80A
A: 0.05-0.25 MPa
B: 0.26-0.7 MPa
100A-150A
A: 0.05-0.25 MPa
B: 0.26-0.5 MPa
Dimensions and Weights
| Size | L (mm) | H (mm) | Weight (kg) | Cv value |
|---|---|---|---|---|
| 15A(1/2) | 145 | 298 | 8.3 | 1.5 |
| 20A(3/4) | 150 | 298 | 8.3 | 2.7 |
| 25A(1) | 150 | 320 | 10.1 | 4 |
| 32A(1-1/4) | 195 | 400 | 17.4 | 8.5 |
| 40A(1-1/2) | 195 | 400 | 17.4 | 11 |
| 50A(2) | 195 | 414 | 19.3 | 14 |
| 65A(2-1/2) | 270 | 572 | 40 | 23 |
| 80A(3) | 270 | 597 | 43.7 | 32.5 |
| 100A(4) | 308 | 665 | 70 | 48 |
| 125A(5) | 380 | 874 | 144 | 75 |
| 150A(6) | 400 | 929 | 173 | 108 |
Dimensional drawing
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