Type B4605/B6605/359

> Safety valves made from Stainless Steel
> Enclosed discharge valve with threaded connections

Product Description

Type B4605/B6605/359

4.6mm Nominal Bore Enclosed Discharge Safety Relief Valve for Compressed Air & Gases


Example Applications:
  • Air/Gas compressors
  • Natural Gas
  • Pressure vessels
  • Medical gases
  • Technical Gases
  • Hydrogen production/generation



View or Download Datasheet

Technical Information

Technical Information for Type B4605 / B6605 / 359

  • Min. Pressure
    35.00 bar (507.50 psi)
  • Max. Pressure
    500.00 bar (7250.00 psi)
  • Temperature Range
    -50°C to 200°C (subject to seal material)
  • Flow Area
    16.61 mm² (4.6 mm inlet bore diameter)
  • Inlet Connection(s)
    3/8" to 1/2" BSP, BSPT or NPT
  • Outlet Connection(s)
    1/2" BSP or NPT
  • Flow Rate
    Refer to Flow Tables on the datasheet
  • Materials
    St. Steel
  • Seal Materials
    Metal ball seal
  • Test Certification
    Included - supplied Free of charge
  • Stainless Steel construction with Metal Ball seal


  • 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%


  • 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


Long-Term Investment

By preventing costly breakdowns and downtime, safety relief valves offer long-term benefits for operational efficiency and equipment lifespan.


View or Download the Type Type B4605 / B6605 / 359 Datasheet

Full Technical Information - Including Flow Rates

View or Download the Type 94605 / 946H5 / 95605 / 956H5 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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