Seal-seat for use in ball valves

Details Seal-seat for use in ball valves Seal-seat for use in ball valves

1984-01-26

1986-04-08

Schwadron, Martin P.

Valves and valve actuation

With means to increase head and seat contact pressure

Seat pressed to valve

251315, F16K 2500

Patent

active

045807639

ABSTRACT:
In a ball-type valve having a valve body and an annular seat therein for accommodating the ball, the improvement comprising adapting the seat whereby when the valve is in its open or closed position, the ball compresses the seat to seal the same against the valve body and at the same time tensions the seat to seal thereagainst. Also disclosed is a method of forming a seal between the body of a ball valve and the ball thereof, comprising the steps of providing a seat intermediate the body and the ball and moving the ball toward the body upon assembly of the valve whereby to compress a portion of the seat against the body and at the same time to tension a portion of the seat against the ball, thereby forming the seal between the body and the ball.

REFERENCES:
patent: 3030068 (1962-04-01), Priese
patent: 3384341 (1968-05-01), Ripert
patent: 3488033 (1970-01-01), Priese
patent: 3547403 (1970-12-01), Grauer
patent: 3940107 (1976-02-01), Allenbaugh, Jr.
patent: 4285642 (1981-08-01), Komhyr
patent: 4368755 (1983-01-01), King
patent: 4418887 (1983-12-01), Tubaro
Velan, Advanced Design Ball Valves with Memory Seal 1984, p. 4.

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