Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Patent
1994-03-01
1995-07-25
Michalsky, Gerald A.
Fluid handling
Line condition change responsive valves
Pilot or servo controlled
13750514, 25112918, G05D 1606, G05D 1616, G05D 1620
Patent
active
054353432
ABSTRACT:
A convertible two-stage pressure regulator in which a main valve regulates fluid flow between an inlet and outlet in response to a control pressure produced by a servo regulator valve, the control pressure depending on outlet pressure and the force provided by a regulator spring to a diaphragm carrying a servo regulator valve closure element. Compression of the regulator spring is controlled by a solenoid armature in a plunger assembly which is selectively positionable by a selector knob to obtain higher or lower regulator spring force. Adjustable stops provide for individual adjustment of low and high outlet pressures for each of two pressure ranges. Substantially identical air gaps in the magnetic circuit of the solenoid are provided for both pressure ranges by a magnetic pole piece in the plunger assembly which extends beyond the solenoid coil in one direction and a solenoid armature which extends beyond the solenoid coil in the opposite direction.
REFERENCES:
patent: 4637429 (1987-01-01), Dietiker et al.
patent: 4850530 (1989-07-01), Uecker
Honeywell Inc.
Michalsky Gerald A.
Rubow Charles L.
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