Shuttle valve

Details Shuttle valve Shuttle valve

F - Mech Eng,Light,Heat,Weapons

15

B

137/100

F15B 13/00 (2006.01) F15B 13/04 (2006.01) F16K 11/07 (2006.01)

Patent

CA 1083462

SHUTTLE VALVE Abstract of the Disclosure A shuttle valve comprising a valve body having an elongated bore and a plurality of ports in the side wall of the bore. A control port is located at each end of the bore surrounded by a valve seat. A shuttle valve member slides axially in the bore between the two valve seats to control the flow of fluid between the side wall ports. Bleed passageways provide high pressure fluid to chambers in the bore adjacent to the control port valve seats. A control device, such as a solenoid valve, alternatively connects one control port to a low pressure region and blocks the other, or vice versa, to cause the valve member to move between positions in which it engages one or the other control port valve seat. The ratio of the cross-sectional area of the valve member to the cross-sectional area of the valve seats is relatively small, i.e., the valve seats are of relatively large diameter although the control ports are small. The ratio of valve member area to valve seat area is in the range between 2 to 1 and 4 to 1, and is preferably no more than 3 to 1.

312120

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