Flashback Arrestor 270N/NU

Flashback Arrestor 270N/NU

Flashback arrestor, certified to EN 730-1 / ISO 5175, 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)

Product of WITT 

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WITT Flashback Arrestors for reliable protection against dangerous reverse gas flow and flashbacks in accordance with EN 730-1 / ISO 5175. 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 70 °C / 158 °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 97/23/EC Module H
CE-marked  in accordance with to PED 97/23/EC


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Flashback Arrestor 270N/NU