Valve with backflow preventer

Details Valve with backflow preventer Valve with backflow preventer

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 15/18 (2006.01) E03C 1/10 (2006.01) F16K 24/02 (2006.01)

Patent

CA 2121978

VALVE WITH BACKFLOW PREVENTER Abstract of the Disclosure A valve with a backflow preventer has a valve housing with a fluid inlet, a main flow channel, and a fluid outlet formed therein. A valve element is provided in the valve housing to selectively actuate the valve. The valve element is rotatable between an open position in which a fluid flow path exists between the fluid inlet and the fluid outlet along the main flow channel and a closed position in which no fluid flow path exists between the fluid inlet and the fluid outlet. A chamber is formed in the valve housing in a position which is offset from the main flow channel. The chamber has an opening in fluid communication with the atmosphere, and a ball is provided in the interior of the chamber. The ball is movable between a first position in which the ball prevents fluid backflow from the fluid outlet to the fluid inlet and a second position in which the ball substantially blocks the opening in the chamber.

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