Valve

Details Valve Valve

1989-06-06

1990-11-06

Fox, John C.

Valves and valve actuation

With means to increase head and seat contact pressure

Seat pressed to valve

251315, F16K 506

Patent

active

049680005

ABSTRACT:
A valve with a valve body (11, 43) in the form of a ball or of a segment of a ball has a second, concave, spherical sealing surface (20, 53) which is provided to be resiliently urged against a first sealing surface of the valve body, and at least an outer, cylindrical surface (21, 65, 66) which slidingly contacts a cylindrical guiding surface (22, 55, 56) of equal diameter in the central part of the valve housing. A spring washer (17, 82) abuts an end surface (24, 73) of the seat ring and is firmly clamped with its peripheral portion between an end surface (27, 81) of the central part of the valve housing and an end surface (28, 62) of an end fitting. The end surface of the seat ring comprises an annular abutment surface (24, 73) at a radial distance from an interior of the peripheral portion of the spring washer. The abutment surface is projected in the axial direction toward the end fitting relative to a first, annular portion (23, 70) of said end surface of the seat ring.

REFERENCES:
patent: 3346234 (1967-10-01), Allen
patent: 3401914 (1968-09-01), Shand
patent: 3794291 (1974-02-01), Suyama
patent: 4273309 (1981-06-01), Morrison
patent: 4345738 (1982-08-01), Repirt

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