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Safety Group 645/623N

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Parallel connection of 4 or 5 flashback arrestors 623N, certified to EN 730-1 / ISO 5175 for maximum flow rates

  • highest quality from the world market leader
  • safety elements: flame arrestor [FA], temperature-sensitive cut-off valve [TV], non-return valve [NV]
  • every arrestor 100% tested
  • 260 X 384 mm, 44 kg (4X), 31/46 kg (5X)
  • town gas max. 1.010 m³/h (free flow-off)
  • Information
  • Applications
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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 EN 730-1 / ISO 5175. For applications with high flow rates. Every safety group 100% tested.

Benefits:

  • 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 70 °C / 158 °F

Maintenance:

  • 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

Options:

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

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

Safety Group 645/623N is used in following areas:

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