Flow control valve

Details Flow control valve Flow control valve

1992-03-27

1993-01-26

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137504, G05D 701

Patent

active

051815346

ABSTRACT:
A flow control valve includes a sleeve formed with an inlet port and an outlet port and a spool slidably mounted in the sleeve. A fluid passage having an orifice connects a high-pressure end and a low-pressure end of the spool. An annular seal is liquid-tightly fitted in an annular groove formed in the inner periphery of the sleeve and extends into an annular groove formed in the outer periphery of the spool with a gap left therebetween. A biasing elements is provided to bias the spool in a direction opposite to the direction in which the fluid pressure differential between both ends of the spool tends to urge the spool. A seal can be effected by the annular seal and a shoulder portion of the spool defining the annular groove thereof. The seal, however allows fluid communication from the inlet port toward the outlet port through the orifice to be established with the movement of the spool.

REFERENCES:
patent: 2224216 (1940-12-01), Coberly
patent: 2487520 (1949-11-01), Brown
patent: 3820558 (1974-06-01), Mueller
patent: 4265270 (1981-05-01), Satoh
patent: 4637429 (1987-01-01), Dietiker et al.
patent: 4776367 (1988-10-01), Hilmersson et al.

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