Butterfly valve

Details Butterfly valve Butterfly valve

1978-12-19

1980-09-09

Cline, William R.

Valves and valve actuation

Rotary valves

Butterfly

251306, F16K 1226

Patent

active

042213606

ABSTRACT:
A butterfly valve comprising a valve body provided with a hard body seat having a cylindrical sealing surface, and a valve disc rotatable within the body and provided with a hard disc seat on the periphery thereof. The body seat and the disc seat are adapted to contact each other substantially over the entire circumference. The valve of this invention is capable of good sealing and is opened with a small driving force.

REFERENCES:
patent: 2011641 (1935-08-01), Kruse
patent: 3442488 (1969-05-01), Adams
patent: 3475007 (1969-10-01), Fawkes
patent: 3578287 (1971-05-01), Salerno et al.
patent: 3931955 (1976-01-01), Jacobs
patent: 3963213 (1976-06-01), Brattberg
patent: 4003394 (1977-01-01), Adams
patent: 4037819 (1977-07-01), Kindersley
patent: 4058290 (1977-11-01), Nelimarkka
patent: 4140147 (1979-02-01), Van't Sant

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