Metering valve

Details Metering valve Metering valve

F - Mech Eng,Light,Heat,Weapons

16

K

251/5

F16K 31/128 (2006.01) E03D 3/04 (2006.01) F03D 3/06 (2006.01) F16K 21/12 (2006.01)

Patent

CA 1286647

METERING VALVE Abstract of the Disclosure A valve for delivering a metered flow of liquid for flushing of a plumbing fixture or the like includes inlet and outlet ports and a main valve con- trolling flow from the inlet to the outlet port. A control chamber is in pressure communication with the main valve and a restricted flow path from the inlet port to the control chamber increases the control pressure to hold the main valve closed in a standby condition. A pilot valve is opened by an actuator to reduce control pressure and initiate a cycle of opera- tion of the main valve. A snap acting mechanism is movable between two stable positions for opening and closing the pilot valve. The actuator is capable of operating the snap acting mechanism for opening the pilot valve but not for closing the pilot valve. The main valve in its fully opened position closes the pilot valve regardless of the position of the actuator.

521461

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