Pilot operated relief valve

Details Pilot operated relief valve Pilot operated relief valve

1984-01-26

1986-12-02

Cohan, Alan

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

1374925, F16K 1710

Patent

active

046257560

ABSTRACT:
A pilot operated relief valve is disclosed which includes a first control space operatively connected to the inlet fluid channel, and a second control space operatively connected to the outlet fluid channel. In one embodiment, each control space is connected to a relief outlet by means of an ajustable valve, whereby the valve is adapted to operate as a pressure relief valve in either flow direction. In another embodiment, one of the control spaces is connected to the opposite channel by means of a one-way check valve, so as to function as a makeup fluid supply valve upon the pressure in the opposite channel reaching a predetermined low level.

REFERENCES:
patent: 2091596 (1937-08-01), Kluppel
patent: 2835266 (1958-05-01), Morte
patent: 3923075 (1975-12-01), Farrell
patent: 4364410 (1982-12-01), Chow
Grundlagen der Oelhydraulik, W. Backe, Fourth Edition, 1979, cover page and pp. 242-243.

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