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Birkett WB Series Safety Relief Valves
Spring loaded safety relief valves with a full lift and full nozzle to relieve excess pressure safely in a variety of process vessels


  • Full nozzle, full lift provides high discharge coefficients and high capacities.
  • Broad selection of valve types: conventional or bellows for gas or liquid service enables optimum valve selection.
  • Wide range of materials provides solutions for any application.
  • Lightweight construction reduces handling and shipping costs and benefits offshore service.
  • Seat leakage integrity minimizes fugitive emissions.
  • Interchangeable parts enable simple modification from gas to liquid and conventional to bellows.
  • In-situ testing capability reduces maintenance costs.
  • Reduced number of parts minimizes inventory and reduces maintenance costs.
  • Valves conform to API 526 pressure/temperature ranges, orifice areas and dimensions.
  • Extensive accessory range enables valves to be adapted to meet specific code and application requirements.
  • Optional cleaning for cryogenic and oxygen services available.