CPC F16K 1/123 (2013.01) [F02C 6/08 (2013.01); F02C 9/18 (2013.01); F04D 27/023 (2013.01); F04D 27/0215 (2013.01); F16K 1/126 (2013.01); F05D 2270/65 (2013.01)] | 17 Claims |
1. A sleeve valve comprising:
an inlet port and an outlet port, with a fluid chamber connecting the inlet port to the outlet port;
a sleeve valve movable to close flow from the inlet port to the outlet port, the sleeve valve having a sleeve being biased by a spring to an open position at which it allows flow from the inlet port to the outlet port, and the sleeve moving within a housing, and having a pressure chamber on an opposed side of the sleeve from the spring, such that pressure in the pressure chamber urges the sleeve to a closed position at which it blocks flow from the inlet port to the outlet port;
a line pressure conduit communicates the fluid chamber into the pressure chamber;
pressurized air supplied to the pressure chamber through a selectively closed valve, the selectively closed valve being opened to allow the flow of high pressure air from a pressure source through a high pressure conduit into the pressure chamber to move the sleeve to a closed position;
a control valve controls the high pressure air through the high pressure conduit into the pressure chamber when it is open, and a check valve provided on the line pressure conduit to block flow of the high pressure air moving back outwardly into the fluid chamber;
the control valve is a solenoid valve; and
the solenoid valve controls a position of a pressure relay valve, with the solenoid valve received on a first control conduit, and the pressure relay valve blocking flow through the high pressure conduit into the pressure chamber.
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