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Pressure Relief / Sustaining Valves Diaphragm Actuated

Water
GA diaphragm actuated pressure relief/sustaining valves are used to protect systems from excessive overpressure or to sustain a minimum upstream pressure.  The valve’s pilot system senses the upstream (inlet) pressure. As long as the upstream pressure is below the setting of the valve’s pilot the main valve is tightly closed.   When the inlet pressure rises above the setting of the valve’s pilot opens the main valve to allow flow into the downstream system (sustaining application) or to allow excess pressure to be discharged out of the system (relief application).  GA diaphragm actuated relief/sustaining valves can be supplied with solenoid shutoff and/or check function as well as other optional features.  See individual Data Sheets for details.

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General information

Product features and benefits

  • Conforms to AWWA Standard C530
  • NSF-61 Certified for Contact with Drinking Water
  • NSF-372 Certified Lead Free
  • 1¼” to 16” Globe, 1¼” to 10” Angle
  • 3” to 10” Reduced Port Globe
  • NPT to 3”, Class 150 or 300 flanged 1½” to 16”
  • Standard Features
    • Fusion Bond Epoxy Coated
    • Opening Speed Control (1¼” to 4”)
    • Wye Strainer
    • Pilot Isolating Valves
    • Closing Speed Control
    • Inlet Pressure Gauge

Material

  • Body, Cover – Ductile Iron
  • Trim – Stainless Steel
  • Seat – Buna-N Rubber
  • Diaphragm – Reinforced Buna-N Rubber
  • Cover Fasteners – Stainless Steel

Corrosion protection

  • Fusion Bond Epoxy Coating

Product versions

Basic Pressure Relief Valve

Product features and benefits
  • Normally closed, opens when inlet pressure exceeds pilot setting
  • Opens as far as required to discharge water out of the system at the rate needed to prevent a further rise in pressure
  • Slowly closes when inlet pressure subsides below pilot setting

Basic Pressure Sustaining Valve

Product features and benefits
  • Normally closed, opens when inlet pressure exceeds pilot setting
  • Main valve is fully open as long as the inlet pressure is above the pilot setting
  • Should inlet pressure fall to the setting of the pilot, the valve will throttle as needed to sustain the inlet at the pressure set on the pilot.
  • The valve will close tightly if the inlet pressure falls below the pilot setting
  • Can be supplied with the following additional function:
    • Check Feature – prevents reverse flow through valve

Pressure Relief / Sustaining Valve with Solenoid Shutoff

Product features and benefits
  • Functions as pressure relief or sustaining valve but with the additional ability to close the valve, or prevent it from opening, by remote electrical signal
  • Can be supplied with the following additional function:
    • Check Feature – prevents reverse flow through valve
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Address

VAG USA, LLC
9025 Marshall Road
Cranberry Township, PA 16066
United States
+1 724-776-1020 +1 724-776-1254 Write e-mail