High temperature dual butterfly valve

Details High temperature dual butterfly valve High temperature dual butterfly valve

1981-06-01

1983-03-22

Nilson, Robert G.

Fluid handling

Systems

System with plural openings, one a gas vent or access opening

137601, 251306, 251360, F16K 120, F16K 146

Patent

active

043771815

ABSTRACT:
A large, high temperature, cost-effective butterfly valve with provisions for simple internal inspection and repair through a transverse access opening that is substantially smaller than the valve seat opening and which is repairable without necessitating removal of the valve body from the pipeline. A plurality of closure members that span the width of the valve seat opening are positionable in compact manner for removal through the small transverse access opening. A substantially annular seat is defined within the valve by a plurality of seat segments that are disposed in supporting and supported slip joint relation, thus permitting substantial radial expansion and contraction of the valve body without subjecting the valve seat structure to circumferential stresses.

REFERENCES:
patent: 1464244 (1923-08-01), Drake
patent: 1801361 (1931-04-01), Moore
patent: 3048363 (1962-08-01), Garrigan
patent: 3533438 (1970-10-01), Smith
patent: 4105040 (1978-08-01), Chester
patent: 4266753 (1981-05-01), Okada

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