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Pressure Operated Relief Valve Model PORV-0

 

The PORV 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 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 is UL Listed when installed as part of the control trim of UL Listed deluge valves.

Features and Benefits

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: 1.5 bar (22 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” NPT

Approvals(1)

  •  UL-Listed
  •  VdS Certified

Option:

  •  Mechanical Latching type with Manual Reset, model PORV-M.

     The PORV-M latches on its open position when pilot line pressure
     drops below the set point