Flow control valve employing a step motor

Fluid handling – With indicator – register – recorder – alarm or inspection means – Position or extent of motion indicator

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Details

251120, 25112911, 251263, 2512495, 2513353, F16K 3700

Patent

active

061455385

ABSTRACT:
A flow control valve employing a step motor includes a valve housing having liquid inlet and outlet passageways, and a guide space which is communicated with the liquid inlet and outlet passageways, a spool which is connected to be movable up and down to the guide space of the valve housing so as to control an openness of the outlet passageway, a spool guide which is accommodated in an upper portion of the guide space so as to flow a refrigerant liquid downward by being moved together with the spool, an elastic support which elastically supports the spool guide in one direction, a seal member which is connected to a lower end portion of the valve housing, wrapping around a lower portion of the spool, so as to prevent a leakage of the refrigerant liquid, and a driving mechanism having a step motor to move the spool up and down, in which employing a dilatant liquid and a diaphram is eliminated and a proportional control is enabled, to thereby enhance the flow control performance and a durability of the valve.

REFERENCES:
patent: 1903229 (1933-03-01), Colman et al.
patent: 4040445 (1977-08-01), McCormick
patent: 4176687 (1979-12-01), Ensign
patent: 4556193 (1985-12-01), Yoshiga
patent: 4664356 (1987-05-01), Becker et al.

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