Combined metal and plastic diaphragm assembly for a valve

Details Combined metal and plastic diaphragm assembly for a valve Combined metal and plastic diaphragm assembly for a valve

1994-02-15

1995-04-04

Fox, John C.

Valves and valve actuation

Rotary valves

Plug

251214, F16K 502

Patent

active

054029830

ABSTRACT:
A sealing assembly for a valve with a rotary actuating shaft includes a top seal formed of a plastic diaphragm and a metal diaphragm, both of which are in sealing relationship with the actuating shaft. The metal diaphragm has a cantilever supported lip that is spring fitted into resiliently biased relationship with the actuating shaft. The sealing surface of the metal diaphragm provides a fire-tested seal in the event that the seal of the plastic seal is destroyed by fire.

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