Butterfly valve assembly and method of manufacturing the same

Details Butterfly valve assembly and method of manufacturing the same Butterfly valve assembly and method of manufacturing the same

1979-01-24

1981-04-07

Schwadron, Martin P.

Fluid handling

With casing, support, protector or static constructional...

Jacketed

251214, 251306, F16K 122

Patent

active

042599806

ABSTRACT:
A check valve assembly has a housing, and a throttle valve which includes a throttling disc rotatable in the housing and a spindle connected with the throttling disc for rotating the latter. The throttle valve is coated with a protective jacket of a synthetic plastic material, which is of one piece and coats the throttling disc and the spindle, including portions of the latter which extend outwardly beyond the housing. The inner side of the housing may be coated by a protective lining which coats an inner side of the housing facing toward the throttle valve. An additional elastic lining may urge the protective lining against the protective jacket in the region of the spindle. A method of manufacturing the check valve includes forming the protective lining so that it has a greater inner diameter than the protective jacket. The synthetic plastic material of the protective lining is shrinkable so that after cooling of the protective lining it abuts against the protective jacket in the region of the throttling disc of the throttle valve.

REFERENCES:
patent: 1998882 (1935-04-01), Merrill
patent: 2202735 (1940-05-01), Johnson
patent: 3661171 (1972-05-01), Smith et al.
patent: 3778028 (1973-11-01), Graves et al.

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