One-Way Relief Valves

Relieve excessive pressure or vacuum from building up inside a container

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  • With its extra-low pressure setting, the 553 pressure relief valve that is primarily used to provide precise control of the positive pressure in an enclosure with clean air or nitrogen purge. The static pressure can be controlled by the adjustable nut found behind the hinging, louvered cover. One valve is sufficient for a container with an internal volume of 866 ft3 that can withstand a pressure differential of 0.4 psig.
    Drawing
    3D Model
     
    • Diameter: 4 in
    • Housing: Aluminum
    • Housing Finish: Hard Anodized
    • Seals: Neoprene
    • Standard Cracking Pressure: 0.40 ± 20% inH2O
  • A lower-cost variant of the 553, the 554 Pressure Relief Valve utilizes PVC internal components to provide precise positive pressure control in an enclosure with clean air or nitrogen purge. The 554 valve is used in the oil industry to maintain positive pressure in processing control cabinets.
    Drawing
    3D Model
     
    • Diameter: 4 in
    • Housing: Aluminum
    • Housing Finish: Hard Anodized
    • Seals: Neoprene
    • Standard Cracking Pressure: 0.40 ± 20% inH2O
  • The PR4000 pressure relief valve was developed for the mobile refrigeration industry as a low-cost solution to the problem of hinges and latches being damaged due to the pressure generated from slamming the door shut. With this valve, doors can be easily closed in both walk-in refrigerators as well as refrigerated vans and trucks while preventing damage to the door and seals.
    Drawing
    3D Model
     
    • Diameter: 4.5 in
    • Housing: PVC
    • Housing Finish: Natural (White)
    • Seals: Neoprene
    • Standard Cracking Pressure: 1.0 ± 20% inH2O
  • The PR5002 one-way pressure relief valve can flow a large volume of air at a low differential pressure. It can be used as a relief device to make it easier to close large doors in a sealed enclosure or can be used to satisfy Rapid Decompression requirements per MIL-STD-1791C.
    Drawing
    3D Model
     
    • Diameter: 5 in
    • Housing : Aluminum
    • Housing Finish: Black Anodized
    • Seals: Silicone
    • Standard Cracking Pressure: 0.25 - 0.50 psig