Pressure balanced proportional flow control valve

Details Pressure balanced proportional flow control valve Pressure balanced proportional flow control valve

1990-04-27

1991-02-05

Rosenthal, Arnold

Valves and valve actuation

Electrically actuated valve

Balanced valve

25112408, F16K 3106

Patent

active

049898299

ABSTRACT:
A flow control valve (20) has a needle valve (76) for controlling flow between an inlet adapted to be connected to a source of pressure and an outlet adapted to be connected to an operating device whose operation is dependent upon the position of the needle valve; the needle valve is positioned by an armature (60) magnetically attracted by a solenoid coil (18); the armature is pressure equalized by two pins (72, 74) acting on the opposite ends (60a, 60b) of the armature and by a bypass tube (90) for supplying source pressure to each pin such that the control position of the valve is unaffected by changes in the pressure and is dependent solely upon the average current flow through the solenoid coil.

REFERENCES:
patent: 3606241 (1971-09-01), Bornholdt

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