Ball valve

Details Ball valve Ball valve

1986-08-07

1987-07-07

Schwadron, Martin P.

Valves and valve actuation

With means to increase head and seat contact pressure

Seat pressed to valve

251287, 251292, 251315, F16K 2500, F16K 506

Patent

active

046781617

ABSTRACT:
A ball valve in which the ball of the valve is positively prevented from blowing out of the valve body in both directions, even if the valve is connected in the wrong direction or the fluid pressure is applied to the valve in the opposite direction. The ball is arranged in a valve body to selectively open and close a fluid passage in the body, and annular seals abut against the ball from both sides of the fluid passage, the annular seals being pushed towards the ball by seal carriers. In one embodiment, one of the seal carriers has a flange on the periphery of one end thereof, and the flange is locked to a step from inside which is formed on inner surface of one end portion of the valve body. In a second embodiment, the ball additionally has two grooves with abutting walls in respective ones of which a spindle and a pin coaxial with the spindle are fitted with the abutting walls positioned on the side of the one seal carrier.

REFERENCES:
patent: 1784381 (1930-12-01), O'Stroske
patent: 3550902 (1970-12-01), Pidgeon et al.
patent: 4023773 (1977-05-01), Wise
patent: 4059250 (1977-11-01), Guldener et al.
patent: 4099705 (1978-07-01), Runyan
patent: 4103865 (1978-08-01), Nanba et al.
patent: 4327895 (1982-05-01), Blumenkranz et al.
patent: 4449694 (1984-05-01), Hobart et al.
Japanese Utility Model Application No. 57-105474.

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