Pressure Operated Relief Valve Model PORV-A

Features

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” NPT

Approvals(1)

  •  UL-Listed

Description

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.

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