Flashback Arrestor 85-20

Standard flashback arrestor, certified to DIN EN ISO 5175-1, for high flows

  • highest quality from the world market leader
  • safety elements: flame arrestor [FA], temperature-sensitive cut-off valve [TV], check valve [NV]
  • every arrestor 100% tested
  • 2.44 X 5.16 inches, 51.15 oz
  • acetylene max. 1,588 scfh (free flow-off)
  • fuel gases max. 11,436 scfh (free flow-off)
  • oxygen max. 11,754 scfh (free flow-off)

This model is also available in Stainless Steel

    Data sheet Downloads
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    WITT Flashback Arrestors for reliable protection against dangerous reverse gas flow and
    flashbacks according to DIN EN ISO 5175-1.

    Every Arrestor 100% tested.

    The best Flashback Arrestors in the world:

    • a large surface area flame arrestor FA of stainless steel construction extinguishes any dangerous flashback entering the device in any direction
    • a temperature-sensitive cut-off valve TV extinguishes sustained flashbacks long before the internal temperature of the arrestors reaches a dangerous level
    • a spring-loaded check valve NV prevents slow or sudden reverse gas flow from forming explosive mixtures in the gas supply

    Operation / Usage:

    • Flashback Arrestors are used to protect gas cylinders and pipeline outlet points (hoses and any equipment) against dangerous reverse gas flow and flashbacks
    • for pipeline outlets and single cylinders with high users for example supply units for gas cutting machines
    • WITT Flashback Arrestors may be mounted in any position /orientation
    • only one piece of equipment may be connected to a single Flashback Arrestor
    • the maximum ambient / working temperature is 60 °C / 140 °F
    • gases: acetylene, natural gas, hydrogen, oxygen, ethylene, propane, compressed air (more upon request)


    • annual testing of the non-return valve, body leak tightness and flow capacity is recommended
    • WITT is happy to supply special test equipment
    • Flashback Arrestors are only to be serviced by the manufacturer

    Company certified to ISO 9001

    Cleaned for Oxygen Service according to EIGA IGC Doc 13/12/E: Oxygen Pipeline and Piping Systems








    Here you find all downloads for the product.


    Test Rig 722

    Test Rig 722

    For the annual testing of WITT flashback arrestors and check valves



    For hose or pipe connection PN 10