Valve with shuttle for use in flow management systems
View Patent ↗A valve with a shuttle for use in a flow management system is capable of bypassing a backflow.
1. A valve for use in a flow management system comprising:
a valve body with a spill port between valve ends;
a shuttle located in a chamber of the valve body;
the shuttle having a through hole extending linearly between a shuttle closure end and a shuttle spring end;
a first seat located in the through hole and a first seat closure which closes against the first seat when the first seat closure moves toward the shuttle spring end;
a second seat located above the spill port at the interior of the valve body;
a second seat closure located on the shuttle closure end;
a spring located to one side of the spill port;
the spring between the shuttle spring end and a valve inlet;
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;
the spring urges the shuttle to block the spill port;
a shuttle perimeter for sealing against a valve body interior and for forming a movable seal; and,
a cage limiting the motion of the first seat closure, the cage including a stabilizer preventing the first seat closure from blocking flow entering the through hole at the shuttle spring end.
2. The valve of claim 1 further including a valve center line, the through hole lying along the center line.
3. The valve of claim 2 further including a seal below the spill port at the interior of the valve body.
4. The valve of claim 3 wherein the second seat is formed on an inwardly projecting nose of the valve body.
5. The valve of claim 4 wherein a spill port inlet is adjacent to the second seat.
6. The valve of claim 1 wherein the first seat and seat closure avoid contact with a spring.
7. The valve of claim 6 wherein the spring urges the shuttle to close the spill port.
8. The valve of claim 1 wherein the spilled flow enters an annulus bounded by a casing.