Poppet relief valve

Details Poppet relief valve Poppet relief valve

1976-05-03

1978-02-07

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Bi-directional flow valves

F16K 1718

Patent

active

040721655

ABSTRACT:
A poppet type relief valve includes a poppet and associated seat with the poppet being mounted in an actuator which is connected to the poppet by a lost-motion connection. The poppet is spring loaded with respect to the actuator, and the actuator is also spring loaded toward the seat. When pressure is applied between the poppet and the actuator, the actuator is forced back against its spring until the lost motion is taken up. Further increases in pressure cause the actuator to pull the poppet away from its seat permitting flow through the valve in one direction. Pressure applied on the opposite side of the poppet causes the poppet to move away from the seat without necessarily moving the actuator simply by overcoming the force of the spring between the poppet and the actuator. Thus, pressure on one side of the poppet will cause it to open at a predetermined pressure, and pressure on the opposite side will also cause it to open at another predetermined pressure.

REFERENCES:
patent: 2778378 (1957-01-01), Presnell
patent: 2804881 (1957-09-01), Seid
patent: 3067770 (1962-12-01), Fancher
patent: 3483886 (1969-12-01), Napolitano

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