Beveiligings samenstel 645/623N

Samenstel van 4 of 5 vlamdovers 623N volgens de DIN EN ISO 5175-1 voor maximale flow

  • hoogste kwaliteit van de wereldmarktleider
  • beveiligingselementen: vlamdover [FA],  thermisch gestuurde afsluiter  [TV], gaskeerklep [NV]
  • ieder appendage wordt 100% getest
  • 260 X 384 mm, 44 kg (4-voudig), 31/46 kg (5-voudig)
  • Stads-, en aardgas max. 1.010 m³/h (vrije uitstroom)

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Parallel connection of 4 or 5 Flashback Arrestors model 623N
WITT Safety groups for reliable protection against dangerous reverse gas flow and flashbacks according to DIN EN ISO 5175-1. For applications with high flow rates. Every safety group 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

Operation / Usage:

  • in central gas supplies (behind the manifold pressure regulator or in a pipeline system)
  • in thermal processing systems conforming to EN 746-2 (cutting machines, furnace supply equipment)
  • WITT safety groups may be mounted in any position/ orientation in pipelines / supply pipes
  • 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
  • safety groups are only to be serviced by the manufacturer


  • flange end connections (nominal diameter 32 - 65)
  • connection: two-sided female thread (G-; NPT-thread; Rc-thread)

Company certified ISO 9001and PED 97/23/EC Module H
CE-marked in accordance with PED 97/23/EC


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