Low torque valve disc for lined butterfly valves

Details Low torque valve disc for lined butterfly valves Low torque valve disc for lined butterfly valves

1983-02-10

1984-12-25

Schwadron, Martin P.

Valves and valve actuation

Rotary valves

Butterfly

251306, F16K 122

Patent

active

044899173

ABSTRACT:
A butterfly valve disc with generally oval plane surface tiltingly arranged so that the outer periphery forms a perfect circle intersecting with the inner lined bore of a butterfly valve, and where the two semicircular wall portions forming said disc have annularly offset planary axes to substantially reduced hydrodynamic torque, the outer periphery further forming a rim of generally rectangular cross-section, one corner of which seatingly contacts the inner liner of said butterfly valve.

REFERENCES:
patent: 1251453 (1917-12-01), Spencer
patent: 1332000 (1920-02-01), Pfau
patent: 2271390 (1942-01-01), Dodson
patent: 2278421 (1942-04-01), Brown

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