Sealing device for valves

Details Sealing device for valves Sealing device for valves

1981-12-08

1984-10-16

Schwadron, Martin P.

Valves and valve actuation

Rotary valves

Butterfly

277236, F16K 122

Patent

active

044770570

ABSTRACT:
The device comprises a main valve-seat of sheet metal having an anchoring flange attached to the valve body and a closure structure which is adapted to cooperate with the valve disk by means of an outer wall forming a curled shell, said closure structure being applied against the convex surface of an auxiliary seat which is in turn applied against the valve body in order to ensure resilient coiling-up of the curled shell when closing the valve, thereby reducing the operating torque of the valve and achieving enhanced leak-tightness in the closed position.

REFERENCES:
patent: 3250510 (1966-05-01), Williams
patent: 4194749 (1980-03-01), Bonafous
patent: 4247079 (1981-01-01), Friess

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