Rotary cock with generally spherical valve member

Details Rotary cock with generally spherical valve member Rotary cock with generally spherical valve member

1985-05-20

1986-03-11

Weakley, Harold W.

Valves and valve actuation

With means to increase head and seat contact pressure

Seat pressed to valve

251174, 251317, 137629, F16K 2500

Patent

active

045750459

ABSTRACT:
A ball valve has a movable upstream valve seat with a metal lip engageable with the valve ball under pressure generated by a bellows section or metal membrane connected between the movable valve seat and the housing. The force of fluid pressure against this moveable valve seat is relieved by operation of a bypass valve connecting opposite sides of this seat. The ball can also have a deformable metal lip.

REFERENCES:
patent: 2777664 (1957-01-01), Bryant
patent: 2950896 (1960-08-01), Buttikor
patent: 3172192 (1965-03-01), Dresden
patent: 3392743 (1968-07-01), Pennington
patent: 3414233 (1968-12-01), Priese
patent: 4217923 (1980-08-01), Kirdensley
patent: 4262688 (1981-04-01), Bialkowski
patent: 4392633 (1983-07-01), Van Winkle

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