Control valve with pressure equalization

Details Control valve with pressure equalization Control valve with pressure equalization

1991-11-07

1993-02-23

Rosenthal, Arnold

Valves and valve actuation

Electrically actuated valve

Including solenoid

251282, 251359, F16K 3106

Patent

active

051883376

ABSTRACT:
A control valve for fluid media has an adjusting piston which is displaceable by a drive and whose face end can be seated against a valve seat. The adjusting piston and the drive are disposed in a valve housing which is completely filled with fluid. The adjusting piston is formed by a hollow body through which fluid can flow on both sides in the direction of its axis, and the hollow body surrounds a cavity. The cavity is sealed by a first sealing member extending transversely of its axis against the valve housing, and by a second sealing member which extends against a dividing wall which is contained in the cavity and is displaceable in a direction of the axis. The valve housing is filled on one side of the first and second sealing member facing away from the valve seat with an incompressible hydraulic protective fluid.

REFERENCES:
patent: 3606241 (1971-09-01), Bornholdt
patent: 4010769 (1977-03-01), Lorenzo et al.
patent: 4582294 (1986-04-01), Fargo
patent: 4624285 (1986-11-01), Perach

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