Internal relief and bypass valve for pumps and piping systems

Details Internal relief and bypass valve for pumps and piping systems Internal relief and bypass valve for pumps and piping systems

1996-06-10

1999-07-13

Rivell, John

Fluid handling

Line condition change responsive valves

Pop valves

13754323, 137569, 417310, F16K 1730, F16K 1506, F04B 4924

Patent

active

059212748

ABSTRACT:
A pressure relief or fluid bypass valve is provided which includes a valve body comprising a first piston, a second piston and a seating land disposed between the first and second pistons. The first piston is directed toward the discharge side of the fluid system; the second piston is disposed on the suction side of the fluid system. The first piston is configured to include an entrance orifice disposed toward the discharge side of the system and at least one exit orifice disposed between the second piston and the entrance orifice. A passageway provides fluid communication between the entrance orifice and the exit orifice. When the valve is in the fully open position, fluid is communicated from the discharge side, through the entrance orifice, through the passageway and out through the exit orifice to the suction side. The valve assembly includes a spring or other biasing means for biasing the valve body into the closed or sealed position.

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patent: 4498849 (1985-02-01), Schibbye et al.
patent: 4529165 (1985-07-01), Lehrach

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