Fire safe seal

Details Fire safe seal Fire safe seal

1980-08-25

1982-08-24

Weakley, Harold W.

Valves and valve actuation

Rotary valves

Ball valve

251172, 251317, 137 72, 137 74, 277213, F16K 500

Patent

active

043457380

ABSTRACT:
A fire-safe seal for a valve having a metallic seat ring with a resilient seal ring in a leading face thereof to seal against a valve closure member. A thin, metallic flexible diaphragm is clamped around its outer edges to the body and around its inner edge to the seat ring. An annular sealing ridge, which is concentric to and smaller than the resilient seal, is provided around the face of the seat ring to provide a metal-to-metal seal in the event of destruction of the resilient seal.

REFERENCES:
patent: 222388 (1879-12-01), Doty
patent: 3132837 (1964-05-01), Britton
patent: 3346234 (1967-10-01), Allen
patent: 3401914 (1968-09-01), Shaud
patent: 4113268 (1978-09-01), Simmons
patent: 4286614 (1981-09-01), Kacal

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