Erosion resistant high pressure relief valve

Details Erosion resistant high pressure relief valve Erosion resistant high pressure relief valve

1994-12-28

1996-10-15

Rivell, John

Fluid handling

Line condition change responsive valves

Direct response valves

251333, F16K 1502

Patent

active

055644694

ABSTRACT:
A high pressure relief valve for use in a high pressure fluid pump is shown and described. In a preferred embodiment, a valve seat is provided with a tapered hole and with a conduit, the tapered hole and conduit being in fluid communication with each other and with fluid having a variable pressure. A tapered pin having grooves is held in the tapered hole by a control force, or control pressure acting through a plunger. When the pressure of the fluid is sufficiently high to overcome the control force or pressure, the tapered pin is forced to move sufficiently to create an annular clearance between the tapered pin and the tapered hole, thereby allowing pressurized fluid to flow past the pin to an outlet. An outer surface of the valve seat in a region of the tapered pin is tapered in an opposite direction to that of the tapered hole, thereby weakening the valve seat in that region, such that the tapered hole is able to expand and contract as the pressure of the fluid increases and decreases.

REFERENCES:
patent: 1443675 (1923-01-01), Bowler
patent: 2059759 (1936-11-01), Stearns
patent: 2429578 (1947-10-01), Gleasman
patent: 3550617 (1970-12-01), Johnson
patent: 4350179 (1982-09-01), Bunn et al.
patent: 4620562 (1986-11-01), Pacht

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