Pressure Operated Relief Valve Model PORV-A
The PORV-A is a direct acting on/off valve, actuated by a pressure responsive diaphragm, which tends to reach equilibrium with the set spring force. The PORV-A is held closed by pneumatic or hydraulic pressure, sensed at its control chamber (under the diaphragm). It opens in response to a pressure drop of the wet/dry pilot line to below the set point, and/or in response to pressure being drained from its control chamber by a solenoid or other releasing device. The PORV-A is UL Listed when installed as part of the control trim of UL Listed deluge valves.
Materials
Body
- Stainless Steel 316 ASTM A351 Grade CF8M
- Forged Brass
- Nickel Aluminum Bronze ASTM B148 C95800
Springs
- Stainless Steel
Elastomers
- NBR
Wetted Parts
- Stainless Steel 303 & Brass (standard)
- Stainless Steel 316
- Monel 400
- Hastalloy C-276
Orifice
- 9 mm
Pressure Adjustment
Valve opens when pilot line pressure drop to the Setting Point
- Standard factory set: 3.5 bar (50 psi)
- Setting Range: 0.5 – 8 bar (7 – 115 psi)
Pressure Rating
- 21 bar (300 psi)
Temperature
- Water upto 80°C (180°F)
Flow factor
- KV 1.0 (CV 1.2)
Connections
- 1/4 inch NPT
Approvals(1)
- UL-Listed
