Flashback Arrestor 270N/NU

Flashback arrestor, certified to DIN EN ISO 5175-1, for very high flow rates

  • highest quality from the world market leader
  • safety elements: flame arrestor [FA], check valve [NV], temperature-sensitive cut-off valve [TV]
  • every arrestor 100% tested
  • 2.42 X 5.11- 6.24 inches, 56-68 oz
  • fuel gases (other than acetylene) max. 13,096 scfh (free flow-off)
  • air max. 5,789 scfh (free flow-off)

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    WITT Flashback Arrestors for reliable protection against dangerous reverse gas flow and flashbacks in accordance with 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 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)
    • also in thermal processing systems against dangerous reverse gas flow and flashbacks
    • WITT Flashback Arrestors may be mounted in any position /orientation
    • the maximum ambient / working temperature is 60 °C / 140 °F


    • annual testing of the check 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 and PED 2014/68/EC Module H
    CE-marked  in accordance with to PED 2014/68/EC


    Pipeline Fittings

    Pipeline Fittings

    For flashback arrestors models 270N/NU and 623N/NU, as well as check valve model 70

    Test Rig 722

    Test Rig 722

    For the annual testing of WITT flashback arrestors and check valves