Ball valve

Details Ball valve Ball valve

1983-05-02

1985-09-10

Schwadron, Martin P.

Valves and valve actuation

Rotary valves

Ball valve

251317, 251367, F16K 506

Patent

active

045401578

ABSTRACT:
A disposable ball valve wherein the union is adhered inside the valve body of the valve housing so as to form the valve chamber for rotatably receiving the ball therein. On the surfaces of the valve body and the union facing the ball, annular grooves of rectangular cross-sections are formed. Within the annular grooves, there are fitted annular seating rings made of polytetrafluoroethylene backed by resilient rubber rings. Thus, the ball and the union do not disconnect from the valve housing by applied fluid pressure, and the sealing performance of the ball valve can be maintained for a long period. In addition, contact surfaces of the valve housing and the tubular caps are formed in the shape of complementary spherical surfaces slidable to each other. Thus, even if the pipelines are deviated from the axis of the flow passage by means of external forces, the ball valve substantially does not receive such excess forces.

REFERENCES:
patent: 3096965 (1963-07-01), Margus et al.
patent: 3550902 (1970-12-01), Pidgeon
patent: 3605792 (1971-09-01), Westbrook
patent: 4023773 (1977-05-01), Wise
patent: 4099705 (1978-07-01), Runyan
patent: 4327895 (1982-05-01), Blumenkranz et al.
patent: 4411407 (1983-10-01), Ninomiya et al.
patent: 4449694 (1984-05-01), Hobart et al.

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