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VRVH Series Vent Relief Valve

Brand: Generant Inc

A compact, highly accurate, direct acting pressure relief valve. 

Factory preset to desired crack pressure and/or flow specifications. Internal adjustment provides tamper proof safety against inadvertent pressure changes. 

Available vent to atmosphere or inline configurations. Valves feature an encapsulated O-ring seal to prevent extrusion at higher differential pressures.
Features
  • Accurate and repeatable cracking pressure
  • 100% factory preset and tested
  • Zero leakage to 95-98% of set pressure
  • Tamper proof adjustment
  • Excellent reseal performance
  • Compact size

Specifications

Brand

Burst Pressure

  • psig: > 1,000 (kPa: 6,900, bar: 69) - VRVHI Series

Enclosure, Body Material

  • Brass

Flow Rate

  • 12 to 175 scfm - VRVHI Series
  • 7.5 to 150 scfm - VRVH Series

Materials of Construction

  • Spring Retainer: 316 Stainless Steel - ASTM A479

NPT Connection

  • 1/4” NPT Female
  • 1/4” NPT Male
  • 1/8” NPT Female
  • 1/8” NPT Male

Nut & Bolt Material

  • Locknut: 300 Series Stainless Steel (18-8)

O-Ring Material

  • O-Ring Cup: Brass, ASTM B16

Pressure Range

  • psig: 150 to 600 (kPa: 1,030 to 4,200, bar: 10.3 to 42)

Proof Pressure

  • psig: 750 (kPa: 5,200, bar: 52) - VRVHI Series

Seat / Seal Material

  • Seal: Buna-N
  • Seal: Ethylenepropylene
  • Seal: Neoprene
  • Seal: PTFE
  • Seal: Silicone
  • Seal: Viton

Spring Material

  • 302 Stainless Steel - ASTM A313
  • 631 Stainless Steel (17-7 PH), ASTM A313

Stem Material

  • Brass, ASTM B16

Temperature Range

  • -195° to 177° C (-320° to 350° F)

Tolerance

  • Set Pressure: ± 5 % on Increasing Pressure

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