Flashback Arrestor 85-10NU (eccentric) for fuel gases_ 9/16″ LH


Flashback arrestor, certified to EN 730-1 / ISO 5175, UL listed, for high-performance torches, off-center connection

  • highest quality from the world market leader
  • safety elements: flame arrestor [FA], check valve [NV], temperature-controlled cut-off valve [TV], filter on gas inlet
  • every arrestor 100% tested
  • UL listed
  • 1.34 X 3.9 – 4.65 inches, 14.7 oz
  • acetylene max. 776 scfh (free flow-off)
  • fuel gases max. 8,295 scfh (free flow-off)
  • oxygen max. 10,942 scfh (free flow-off)

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WITT Flashback Arrestors for reliable protection against dangerous reverse gas flow and flashbacks in accordance with to 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 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 torches or burners with high flow: Models 85-10NU and 85-10 eccentric = eccentric outlet
  • 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 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; the dirt filter may be replaced according to model by competent staff


Company certified to ISO 9001 and PED 2014/68/EU Module H
CE-marked according to PED 2014/68/EU
Cleaned for Oxygen Service according to EIGA IGC Doc 13/12/E: Oxygen Pipeline and Piping Systems

– Welding & Cutting
– Glass Industry
– Hydrogen Applications


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