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Water Control Solutions

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.
Product Features & Benefits



  • Stainless Steel 316 ASTM A351 Grade CF8M
  • Forged Brass
  • Nickel Aluminum Bronze ASTM B148 C95800


  • Stainless Steel


  • NBR

Wetted Parts

  • Stainless Steel 303 & Brass (standard)
  • Stainless Steel 316
  • Monel 400
  • Hastalloy C-276


  • 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)


  • Water upto 80°C (180°F)

Flow factor

  • KV:1.0 (CV:1.2)


  • 1/4” NPT


  • UL-Listed

PORV A Product Page English