Ball valve having easy maintenance features for extreme environm

Details Ball valve having easy maintenance features for extreme environm Ball valve having easy maintenance features for extreme environm

1983-07-06

1986-01-07

Weakley, Harold W.

Fluid handling

Removable valve head and seat unit

Retained by bonnet or closure

251174, 251315, 251317, F16K 2500

Patent

active

045628602

ABSTRACT:
A valve assembly is provided which is particularly suitable for operation and maintenance under extreme environments. It includes a valve body, a ball valve member rotatably mounted within the valve body, a bonnet removably secured to the valve body, and seat retaining asemblies removably secured to the bonnet. Upon removal of the bonnet, the valve member and all internals are also removed as a unit so that they may be serviced at a convenient location. The seat retaining assemblies may include inclined surfaces which seat against oppositely inclined surfaces defined within the valve body. An alignment plate is secured to the seat retaining assemblies to insure proper sealing.

REFERENCES:
patent: 2936778 (1960-05-01), Stillwagon
patent: 3095898 (1963-07-01), Freeman
patent: 3132836 (1964-05-01), Dickerson
patent: 3150681 (1964-09-01), Hansen
patent: 3179121 (1965-04-01), Bredtschneider
patent: 3194259 (1965-07-01), Garrod
patent: 3306315 (1967-02-01), Cook
patent: 4111393 (1978-09-01), McClurg
patent: 4460012 (1984-07-01), Koumi

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