Type 329

> Safety valves with either Bronze or Stainless Steel body
> Enclosed discharge valve with threaded connections

Product Description

Type 329

6mm Nominal Bore Enclosed Discharge Safety Relief Valve for Compressed Air & Gases


Example Applications:
  • Air/Gas systems
  • Natural Gas
  • Pressure vessels
  • Medical gases
  • Technical Gases
  • CO2 refrigeration
  • Ammonia refrigeration (Stainless steel)
  • Cryogenic applications
  • Liquefied gases



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Technical Information

Technical Information for Type 329

  • Min. Pressure
    53.00 bar (768.50 psi)
  • Max. Pressure
    370.00 bar (5365.00 psi)
  • Temperature Range
    -196°C to 70°C (subject to seal material)
  • Flow Area
    28.26 mm² (6 mm inlet bore diameter)
  • Inlet Connection(s)
    3/8" to 3/4" BSP, BSPT or NPT
  • Outlet Connection(s)
    3/4" BSP or NPT
  • Flow Rate
    1106.00 to 7611.00 kg/hr.
  • Materials
    St. Steel & Bronze or St. Steel
  • Seal Materials
    PTFE / P.P.S
  • Test Certification
    Included - supplied Free of charge
  • Bronze or Stainless Steel body with Stainless Steel inlet


  • The maximum permissible built-up back pressure is 10% of the set pressure
  • Relieving pressure is set pressure +10%
  • Reseating pressure is set pressure -10% (above 240.0 bar reseating pressure is set pressure -15%)


  • 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
  • CRN


Simple Functionality, Profound Impact

Despite their basic operating principles, these valves play a crucial role in various industrial processes, with their impact on safety and reliability being significant.


View or Download the Type 329 Datasheet

Full Technical Information - Including Flow Rates

View or Download the Type 329 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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