Ball valve having improved sealing capability

Details Ball valve having improved sealing capability Ball valve having improved sealing capability

1978-03-13

1980-02-12

Cline, William R.

Valves and valve actuation

Rotary valves

Ball valve

251172, F16K 506

Patent

active

041880153

ABSTRACT:
A ball valve having improved sealing capability, which has a conventional housing, with a flow opening, and means for positioning and rotating the ball inside of the housing. There is at least one metal seal ring which is positioned and sealed inside of the housing, in a position where it is coaxial with the flow opening through the housing. It has a conical surface which includes a resilient seat ring, which faces and is spaced a selected distance from the surface of the ball. The ball has at least one circular wire ring, made of a selected diameter of wire. The ring is attached and sealed to the surface of the ball as a circular ridge in such a position that when the valve is closed the ridge will be coaxial with the seal ring and will penetrate into the surface of the resilient seat ring a selected distance in order to create sufficient internal pressure to seal against fluid pressure in the flow opening through the valve.

REFERENCES:
patent: 3208718 (1965-09-01), White
patent: 3408037 (1968-10-01), Kaiser et al.
patent: 3473554 (1969-10-01), King
patent: 3726504 (1973-04-01), Kormos et al.
patent: 4150810 (1979-04-01), Laignel et al.

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