Donkin Steel Softseal Valve 555/303 Flanged


Donkin Steel Softseal Valve 555/303 Flanged Gas Valve


The Series 555/303 Steel Softseal Valve is a double faced, resilient seat, internal screw, clear bore wedge gate valve. Designed primarily for the isolation of high pressure natural gas, fitting into steel pipelines.



• Clear bore.

• Full double block and bleed with pressure relieving plug.

• Double ‘O’ ring stem seal.

• Soft seal positive shut off.

• Metal to metal secondary seal.

• Maintenance free.

• Suitable for under pressure drilling.

• Suitable for above and below ground use.

• Suitable for end of line service.

• Integral lifting lugs on all sizes.

• Kitemark appoved to GIS V7 Part 1.


• Any combination of flanged or weld end connections.

• Available: False cap, Indicator Handwheel, Bare shaft end.

• Street access down pipe adaptor to provide a cost effective solution for underground installations.


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