HON 226R MK3 & MK4

HON 226R MK3 & MK4

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HON 226R MK3 and MK4 are spring-loaded, diaphragm-operated safety relief valves. The devices are ideal for use at offtake stations in gas distribution as well as commercial and industrial facilities. They are especially useful for protecting pipework and pressure vessels from excessive pressure.​​​

Features include: 

  • Installed downstream of regulator to discharge small amounts of gas in the event of regulator creep, avoiding the tripping closed of the SSV

  • High actuating accuracy

  • Fitting length as required

  • Mounting position as required

  • Test point connection in inlet

  • Suitable for natural, non-aggressive and manufactured gases; nitrogen, carbon dioxide and propane; and other gases upon enquiry

  • Max. inlet pressure pmax0.35 bar

  • Relief pressure range Wd: 0.011 to 0.3 bar (depends on model)

  • Connection

    • 226 MK3: R 1 ¼", 1 ½", 2"

    • 226 MK4: R ¾", R 1 "

  • Temperature range 20 °C to +60 °C

All mechanical components of this device are without potential ignition sources and/ or hot faces. They are not subject to ATEX 95 (94/9/EC). All electronic accessories, on the other hand, meet ATEX requirements.

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