Locking ball valve for a fluid conduit

Details Locking ball valve for a fluid conduit Locking ball valve for a fluid conduit

1996-06-24

1997-05-27

Walton, George L.

Fluid handling

Processes

251 94, 251 95, 25131501, 25131516, F16K 506, F16K 3500

Patent

active

056322941

ABSTRACT:
A locking valve for controlling fluid flow within a conduit has a spring-biased detent in fluid communication with a fluid source. A movable valve structure prevents fluid flow through the conduit in a closed position and enables fluid flow through the conduit in an open position. Movement of the valve structure from the closed position to the open position is obstructed by the detent when fluid pressure in the conduit is below a predetermined pressure. An increase in fluid pressure, however, moves the detent against the spring bias, removing the obstruction to movement of the valve structure, and allowing the valve structure to be moved to the open position. Thus, accidental or intentional drainage of the conduit when the fluid pressure source is inactive is avoided.

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