Top entry ball valve and method of assembly

Details Top entry ball valve and method of assembly Top entry ball valve and method of assembly

1993-07-26

1994-05-24

Walton, George L.

Fluid handling

Processes

Cleaning, repairing, or assembling

137315, 251174, 251176, 251315R, 251316, F16K 520, F16K 2500, F16K 4300

Patent

active

053139763

ABSTRACT:
A top entry floating ball valve (10) and method of assembly including a downstream metal seat (62) mounted within an annular recess about a downstream flow passage (22) and an upstream metal seat (80) urged by a Belleville spring (78) into engagement with ball closure member (24). Ball closure member (24) is urged by Belleville spring (78) into sealing relation with downstream metal seat (62). A smooth planar wall surface (16) is defined by valve chamber (14) about the inlet flow passage (20) and Belleville spring (78) may be easily inserted within the valve chamber (14) along smooth planar wall surface (16) behind upstream metal seat (80). Upstream metal seat (80) has an inner spherical surface (82) conforming to the outer spherical surface (26) of ball closure member (24) and may be easily moved manually along the spherical surface (26) for assembly and disassembly.

REFERENCES:
patent: 3195560 (1965-07-01), Pofit
patent: 3219055 (1965-11-01), Dumm
patent: 3281112 (1966-10-01), Walker
patent: 3387815 (1968-06-01), Richards
patent: 3732885 (1973-05-01), Allen
patent: 3771545 (1973-11-01), Allen
patent: 4273309 (1981-06-01), Morrison
patent: 4637421 (1987-01-01), Stunkard
patent: 4641681 (1987-02-01), Ikematsu et al.
patent: 4658978 (1987-04-01), Ikematsu et al.

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