Fluid flow control valve with bi-directional shutoff

Details Fluid flow control valve with bi-directional shutoff Fluid flow control valve with bi-directional shutoff

2005-12-13

2005-12-13

Bastianelli, John (Department: 3751)

Valves and valve actuation

With means to increase head and seat contact pressure

Seat pressed to valve

C251S177000, C251S192000, C251S315070

Reexamination Certificate

active

06974121

ABSTRACT:
A control valve of the ball type with bi-directional shutoff capabilities is disclosed. The ball valve including an inlet and an outlet, a ball element and a seal assembly. When closing the valve, the ball element, which is eccentrically mounted on a shaft, rotates to abut the seal assembly. While closed, the seal assembly including a seal housing, a main seal and a resilient member, contacts the ball element at the main seal, while the resilient member biases the main seal toward the ball element. The seal assembly further includes a secondary flowpath between the main seal and seal housing, which is restricted by two unidirectional seal rings.

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