Flashback Arrestor 85-20

Flashback Arrestor 85-20 for fuel gases

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Standard flashback arrestor, certified to DIN EN ISO 5175-1, UL listed, 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
  • UL listed
  • 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

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    WITT Flashback Arrestors for reliable protection against dangerous reverse gas flow and
    flashbacks according to DIN EN ISO 5175-1, UL 1357/1358.

    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 158 °F


    • 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







    Flashback Arrestor 85-20 is used in following areas:

    Test Rig 722

    For the annual testing of WITT flashback arrestors and check valves


    For hose or pipe connection PN 10


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