Seal

Details Seal Seal

1988-12-09

1990-04-10

Shoap, ALlan N.

Valves and valve actuation

Valve

Removable seat engaging element

251356, 277182, 277198, 277206R, 277229, 277235R, F16J 1516, F16K 2500

Patent

active

049153552

ABSTRACT:
A seal, especially for a valve, comprises a substantially rigid support member 10, an abutment envelope 22 made from polytetrafluoroethylene (PTFE) defining a volume between it and the support member, and a resiliently deformable, compressed, rubber sealing member 18 positioned in the volume.
The PTFE envelope 22 is relatively chemically inert and allows the seal to be used in chemically harsh environments, the rubber sealing member 18 provides the necessary resilience and the rigid support member produces positive sealing.
In a preferred embodiment, the sealing member 18, the abutment envelope 22 and the support member 10 are annular.

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