Primary Pressure Regulating Valve
GD-20R
* GD-20R discharge excess pressure and maintain a constant line pressure as a pump relief valve
* GD-20R Prevents falling water conditions in the open circuits of high-rise buildings
Specifications
| Features | Direct acting type, ductile cast iron | |
|---|---|---|
| Type | Primary pressure regulating valve | |
| Specifications | Product type | Primary pressure regulating valve/ Pressure sustaining valve |
| Nominal size | 15A (1/2") - 150A (6") | |
| Application | Water, oil, air | |
| 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 | 309 | 8.2 | 1.5 |
| 20A(3/4) | 150 | 309 | 8.2 | 2.7 |
| 25A(1) | 150 | 330 | 10 | 4 |
| 32A(1-1/4) | 195 | 395 | 17.3 | 8.5 |
| 40A(1-1/2) | 195 | 395 | 17.3 | 11 |
| 50A(2) | 195 | 409 | 19.2 | 14 |
| 65A(2-1/2) | 270 | 555 | 40 | 23 |
| 80A(3) | 270 | 582 | 43.7 | 32.5 |
| 100A(4) | 308 | 645 | 70 | 48 |
| 125A(5) | 380 | 849 | 145 | 75 |
| 150A(6) | 400 | 918 | 175 | 108 |
About flow rate
Selection data：
Dimensional drawing
