Fluid control valve with stem seal

Details Fluid control valve with stem seal Fluid control valve with stem seal

1977-10-05

1979-12-04

Schwadron, Martin P.

Fluid handling

Frangible

251214, 251288, 251315, 264242, F16K 506, F16K 4100

Patent

active

041766890

ABSTRACT:
A plug or ball valve is disclosed having a housing and plug or ball in the housing for controlling the flow of fluid therethrough. A valve stem extends through the housing for rotation of the plug. The valve stem has a narrow peripheral shoulder which is held tightly against the housing by fluid pressure on the plug to prevent leakage past the seal when the valve is in a partially open position.

REFERENCES:
patent: 1854837 (1932-04-01), Hansen
patent: 2387013 (1945-10-01), Fuller
patent: 3239191 (1966-03-01), Widera
patent: 3271845 (1966-09-01), Breher
patent: 3486736 (1969-12-01), Scaramucci
patent: 3635439 (1972-01-01), McNally
patent: 3712584 (1973-01-01), Wise et al.
patent: 3712587 (1973-01-01), Specht
patent: 3788602 (1974-01-01), Kitzie
patent: 3961770 (1976-06-01), Wrasman
patent: 4038358 (1977-07-01), Wrasman

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