Flashback Arrestor RF85-30N/H-ES. 11Bar H2

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.Hydrogen up to 11 bar

Max. flow: 310m3/h

Max. Working Pressures: see PDF

Flame arrestor

Non-return valve

Temperature sensitive cut-off valve

Inlet filter

Thread: 3/4″NPT F & 1″NPT F

Item #: 1154
Quantity Available: 100

100 in stock


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.


  • 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 non-return valve NV prevents slow or sudden reverse gas flow forming explosive mixtures in the gas supply
  • a filter at the gas inlet protects the arrestor against dirt contamination, extending the service life

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
  • ideal for use with corrosive gases in the chemical industry, process technology or in laboritories
  • 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 70 °C / 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. The dirt filter may be replaced by competent staff

Company certified to ISO 9001
CE-marked in accordance with PED 97/23/EC

Note: The models RF85-20N and RF85-30N are suitable for fuel gas and oxygen.


View PDF File


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