Flashback Arrestor 85-20

Flashback Arrestor 85-20

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

Product of WITT 


Download Datasheet



WITT Flashback Arrestors for reliable protection against dangerous reverse gas flow and
flashbacks according to to EN 730-1 / ISO 5175, 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


Related Products

Request Quote For

Flashback Arrestor 85-20