Gate valve seal system

Details Gate valve seal system Gate valve seal system

1985-10-01

1987-02-24

Cohan, Alan

Valves and valve actuation

Reciprocating valve

Gate

251328, 13732902, F16K 302, F16K 2500

Patent

active

046451790

ABSTRACT:
This invention relates to an improved gate valve having floating seal elements which are back-relieving and reversible for long-term permanent sealing under varied pressure conditions. The sealing elements are mounted in unrestrained relation in juxtaposed recesses in the fluid passage facing the movable gate with annular gaskets facing both the gate and the recesses for improved self-aligning sealing engagement therewith. The sealing elements and their annular gaskets may be reversed, interchanged, or readily replaced as desired, the valve structure being especially useful for inherently fail-safe slab type gate valves.

REFERENCES:
patent: 4095612 (1978-06-01), Hardcastle
patent: 4179099 (1979-12-01), Pierce, Jr.
patent: 4246928 (1981-01-01), Burns et al.
patent: 4434967 (1984-03-01), Vanderburg
patent: 4487393 (1984-12-01), Eagen
patent: 4515174 (1985-05-01), Hollister et al.

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