Butterfly valve

Details Butterfly valve Butterfly valve

1976-03-01

1977-03-29

Cline, William R.

Valves and valve actuation

Rotary valves

Butterfly

1374542, 251152, F16K 1226

Patent

active

040145115

ABSTRACT:
A butterfly valve comprises a valve body, a valve seat, a valve stem, a valve member and sealing assemblies in which the central portion of a seat face of the valve seat is raised higher than both of its side portions and the diameter of the valve seat at the central raised portion is smaller than that of the valve member whereby a perfect seal can be achieved.

REFERENCES:
patent: 3100500 (1963-08-01), Stillwagon
patent: 3143132 (1964-08-01), Pangburn
patent: 3173650 (1965-03-01), Cotterman et al.
patent: 3241806 (1966-03-01), Snell, Jr.
patent: 3253815 (1966-05-01), Stillwagon
patent: 3314641 (1967-04-01), Overbaugh
patent: 3540691 (1970-11-01), Snell, Jr.
patent: 3633872 (1972-01-01), Wright
patent: 3727883 (1973-04-01), Conners et al.
patent: 3904173 (1975-09-01), Naylor

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