초록

A valve with a shuttle for use in a flow management system is capable of bypassing a backflow.

대표청구항 ▼

1. A valve for use in a flow management system comprising: a valve body with a spill port;a shuttle located in a chamber of the valve body;the shuttle having a through hole extending between a shuttle closure end and a shuttle spring end;a valve center line shared by the valve body and the shuttle;a

1. A valve for use in a flow management system comprising: a valve body with a spill port;a shuttle located in a chamber of the valve body;the shuttle having a through hole extending between a shuttle closure end and a shuttle spring end;a valve center line shared by the valve body and the shuttle;a first seat located on a first face of the shuttle; a first seat closure;the first seat closure having a central bore for accepting a rotatable shaft extending through the valve body;the first seat closure for translating along the rotatable shaft;a second seat located in the valve body chamber and a second seat closure located on a second face of the shuttle;a spring located substantially between the shuttle spring end and a valve body support; and,the valve operable to pass a flow entering the through hole at the shuttle spring end and to spill a flow that closes the first seat closure. 2. The valve of claim 1 wherein the first seat is about radially oriented with respect to the valve center line. 3. The valve of claim 2 wherein the second seat is about radially oriented with respect to the valve center line. 4. The valve of claim 3 wherein the second seat is formed on an inwardly projecting surface of the valve body. 5. The valve of claim 4 wherein a spill port is bounded by the first closure, the shuttle closure end and the valve body when the spill port is open. 6. The valve of claim 5 wherein the spring tends to close the spill port. 7. The valve of claim 6 wherein the difference between the radii of the first and second seats is limited by a shuttle wall thickness. 8. The valve of claim 7 wherein rotation of the shaft operates a pump causing flow through the valve to lift the first closure free of the shuttle. 9. A method of protecting a pump comprising the steps of: providing a fluid to be lifted and a pump for lifting the fluid;providing a valve downstream of the pump, the valve including a valve body with a spill port;a shuttle located in a chamber of the valve body;the shuttle having a through hole extending between a shuttle closure end and a shuttle spring end;a valve center line shared by the valve body and the shuttle;a first seat located on a first face of the shuttle; a first seat closure;the first seat closure having a central bore for accepting a rotatable shaft extending through the valve body;the first seat closure for translating along the rotatable shaft;a second seat located in the valve body chamber and a second seat closure located on a second face of the shuttle;a spring located substantially between the shuttle spring end and a valve body support and,passing a flow entering the through hole at the shuttle spring end; and,spilling a flow that closes the first seat closure.