CPC A01G 7/02 (2013.01) [A01G 13/06 (2013.01); F16K 3/267 (2013.01); F16K 31/383 (2013.01)] | 14 Claims |
1. A valve, comprising:
an inlet and an outlet;
a body including a first seat and a second seat, wherein the first seat and second seat are spaced apart from each other at a predetermined distance without a seal between the first and second seats;
a cavity in the body;
a piston positioned in the cavity, wherein the piston simultaneously contacts and rests against the first seat and the second seat when moving into a closed position, wherein the piston includes a flat front face that contacts the first seat when in the closed position, and a nose extension that extends outward and away from a center portion of the front face and toward the inlet, wherein the nose extension includes a flat front surface and an opening through a center of the flat front surface thereof; and
a pilot ball adjacent the piston, wherein the pilot ball is disposed in a pilot seat, and a rear surface of the piston butts against the pilot seat at a maximum open position of the piston,
wherein each of the first seat and the second seat is a seat that is a mechanical stop that prevents the piston from extending further than the closed position.
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