Type 55004

> Safety valves made from Brass
> Atmospheric discharge with threaded connections

Product Description

Type 55004

3.73mm Bore Atmospheric Discharge Safety Relief Valve for Compressed Air & Gases

Example Applications:
  • Compressors
  • Pressure vessels
  • Pneumatic systems
  • High-pressure systems



View or Download Datasheet

Type 55004 3.73mm Bore Atmospheric Discharge Safety Relief Valve for Compressed Air & Gases)

Technical Information for Type 55004

  • Min. Pressure
    69.00 bar (1000.50 psi) *
  • Max. Pressure
    448.20 bar (6498.90 psi) *
  • Temperature Range
    0°C to 100°C (subject to seal material)
  • Flow Area
    10.92 mm² (3.73 mm inlet bore diameter)
  • Inlet Connection(s)
    1/4" to 1/2" BSP *
  • Flow Rate
    13.20 to 85.10 std. litres/sec.
  • Materials
    Brass & St. Steel
  • Seal Materials
    Viton® / Nitrile
  • Test Certification
    Included - supplied Free of charge
* Dependent on bore size.
See datasheet for full details

Relieving pressure is set pressure +10%
Reseating pressure is set pressure -15%


Flows Rates:

Flow calculated based upon: Air @ 15°C and 1013 mbar and are for guidance only, contact Seetru for help in sizing to your specifications.


  • Designed in accordance with BS EN ISO-4126-1 & -7
  • PED 2014/68/EU (CE)
  • PE(S)R UK SI 2016 No. 1105 (UKCA)
  • EAC


Precise Release Mechanisms

Calibrated to specific pressure thresholds, these valves open at the exact moment necessary to relieve pressure buildup, optimizing system efficiency and avoiding unnecessary venting.


View or Download the Type 55004 Datasheet

Full Technical Information - Including Flow Rates

View or Download the Type 55004 Datasheet

Seetru offers a wide range of downloadable datasheets for our products, including safety relief valves, liquid-level gauges, and sight glasses.  These datasheets provide detailed information on the technical specifications, features, and applications of Seetru products.  They are an essential resource for engineers, designers, and other professionals who need to select the right Seetru products for their specific needs.


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