Size Range : 2″ to 24″ Flanged
- Pressure relief valve is installed on the outlet pipe of water supply pipeline. It can maintain safe water supply pressure inside the pipe and prevent pipeline and equipment damage caused by accidental escalation of water pressure.
- When water pump stops functioning or pipeline gate suddenly closes, abnormal pressure forms inside the pipe. As the pressure gets over a certain the water high pressure. When pressure returns to safety value, pressure relief valve will auto-matically close to ensure the safety of equipment.
- Pressure Adjusting Range : 0.5 kgf/cm2 ~ 10 kgf/cm2 7 kgf/cm2 ~ 20 kgf/cm2
- Applied Temperature : -15 ~ 100 OC 100 ~ 180 OC ( For Steam )
- Valve Body Testing Pressure : 35 kgf/cm2 ( 1 kgf/cm2 = 14.2 psi )
- Maximum Applied Pressure : 25 kgf/cm2 the outlet opens, the valve of the pressure gauge will decrease.
| No. | Description | Material | Qty. |
| 1 | Body | WCB / C.I. / D.I. / CF8 / CF8M | 01 |
| 2 | Cover | Stainless Steel 304 / 316 | 01 |
| 3 | Plug | Stainless Steel 304 / 316 | 01 |
| 4 | Piston | Stainless Steel 304 / 316 | 01 |
| 5 | Piston Guide | Stainless Steel 304 / 316 | 01 |
| 6 | Spring For Piston | S. S. 304 | 01 |
| 7 | Piston Cover Lock Bolt | S. S. | 01 |
| 8 | V – Seal For Piston | NBR / Viton / EPDM | 01 |
| 9 | Piston Seat Ring | NBR / Viton / EPDM | 01 |
| 10 | Flat Ring | NBR / Viton / EPDM | 01 |
| 11 | O – Ring For Piston Guide | NBR / Viton / EPDM | 01 |
| 12 | O – Ring For Piston Lock Bolt | NBR / Viton / EPDM | 01 |
| 13 | Pilot PLV Valve | STD. | 01 |
| Dimensions : (All Dimensions are in mm) | |||||||
| Valve Model | Valve Size | Port | A | L | CV | Weight (Approx.) | |
| MM | Inch | ||||||
| DRF – 50 | 50 | 2″ | 60 | 186 | 190 | 75 | 12 |
| DRF – 65 | 65 | 2.1/2″ | 69 | 196 | 210 | 105 | 15 |
| DRF – 80 | 80 | 3″ | 84 | 211 | 225 | 140 | 18 |
| DRF – 100 | 100 | 4″ | 110 | 223.5 | 250 | 260 | 24 |
| DRF – 125 | 125 | 5″ | 134.5 | 242 | 280 | 390 | 32 |
| DRF – 150 | 150 | 6″ | 158.5 | 256.5 | 309.5 | 550 | 44 |
| DRF – 200 | 200 | 8″ | 208.5 | 303 | 419 | 1000 | 87 |
| DRF – 250 | 250 | 10″ | 257 | 336 | 473 | 1699 | 152 |
| DRF – 300 | 300 | 12″ | 302 | 370 | 532 | 2200 | 202 |
| DRF – 350 | 350 | 14″ | 324 | 415 | 598.4 | 3000 | 265 |
| DRF – 400 | 400 | 16″ | 345 | 413 | 634 | 4000 | 279 |
| DRF – 450 | 450 | 18″ | 472 | 497 | 766 | 5300 | 457 |
| DRF – 500 | 500 | 20″ | 472 | 493 | 772.7 | 6100 | 492 |
| DRF – 600 | 600 | 24″ | 589 | 533 | 900 | 9200 | —– |