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Safety Group 645/85-30

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Parallel connection from 2, 4 or 5 flashback arrestors 85-30, certified to EN 730-1 / ISO 5175, for high flow rates

  • highest quality from the world market leader
  • safety elements: flame arrestor [FA], temperature-sensitive cut-off valve [TV], check valve [NV]
  • every arrestor 100% tested
  • 11.12 X 16.77 inches, 1,760 oz (2X), 2,120 oz (4X)
  • acetylene max. 13,837 scfh (free flow-off)
  • fuel gases max. 96,717 scfh (free flow-off)
  • oxygen max. 65,302 scfh (free flow-off)
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    WITT Safety groups for reliable protection against dangerous reverse gas flow and flashbacks in accordance with 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 check 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 check valve, body leak tightness and flow capacity is recommended
    • safety groups are only to be serviced by the manufacturer

    Options

    • connection: two-sided female thread (G-; NPT-; RC-thread)

    Approvals
    Company certified to ISO 9001 and PED 97/23/EC Module H
    CE-marked in accordance with PED 97/23/EC
    Cleaned for Oxygen Service according to EIGA IGC Doc 13/12/E: Oxygen Pipeline and Piping Systems

    Safety Group 645/85-30 is used in following areas:

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    Headquarters: +49 (0)2302-8901-0
    WITT USA: +1 770-664-4447

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