Vlamdover 270N/NU

Vlamdover volgens de DIN EN ISO 5175-1 voor zeer grote flow

  • hoogste kwaliteit van de wereldmarktleider
  • beveiligingselementen: vlamdover [FA], gaskeerklep [NV],  thermisch gestuurde afsluiter  [TV]
  • ieder appendage wordt 100% getest
  • 62 X 131-160 mm, 1.400-1.700 g
  • Brandbare gassen (uitgezonderd Acetyleen) max. 371 m³/h (vrije uitstroom)
  • Lucht max. 164 m³/h (vrije uitstroom)

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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 non-return 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 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

Company certified to ISO 9001 and PED 2014/68/EC Module H
CE-marked  in accordance with to PED 2014/68/EC


Aansluitfittingen vzv conus

voor vlamdovers typen 270N/NU en 623N/NU alsmede gaskeerkleppen type 70

Test en proefopstelling 722

voor de uitvoer van een jaarlijkse functie test van de WITT-veiligheids appendages