Butterfly valve

Details Butterfly valve Butterfly valve

1979-06-19

1982-06-22

Ostrager, Allen M.

Fluid handling

With cleaner, lubrication added to fluid or liquid sealing...

Liquid supplied at valve interface

251305, 251306, 60657, F16K 1226

Patent

active

043357385

ABSTRACT:
A butterfly valve is disclosed for use in controlling the flow of gaseous fluid under high temperature, high pressure conditions. The interior of the valve body has non-overlapping semi circular valve seats spaced to either side of the shaft for the valve disc. The valve disc is rigid and inflexible throughout and, when closed, its periphery terminates close to the interior of the valve body under all operating temperatures. When the disc is closed, the semi-circular valve seats cooperate with the recessed rigid periphery of the disc to form a chamber chargeable with purging fluid at a higher pressure than the fluid on the upstream side of the valve and effective to prevent flow of the latter past the valve disc.

REFERENCES:
patent: 2011641 (1935-08-01), Kruse
patent: 3946752 (1976-03-01), Yamamoto
patent: 4077432 (1978-03-01), Herr

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