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AssigneeHydac Fluidtechnik GmbH
InventorsPeter Bruck, Philipp Hilzendegen, Gerd Schneider
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A valve, in particular a pilot-operated proportional pressure control valve, with a valve housing (5) which has a pressure supply port (7), a working port (9), and a drain port (11), in the valve housing (5) there being a main valve piston (15) which can be moved by a pilot stage (13) for control of the fluid flow between the pressure supply port (7) and the working port (9), with the pilot stage (13) having a valve closing element (43) for a pilot chamber (41), with the valve closing element (43) being movable from an open position (OS) into a closed position (SS) by an actuating apparatus (45), is characterized in that the valve closing element (43) can actuate a leakage reduction stage (53).
A valve, in particular a pilot-operated proportional pressure control valve, with a valve housing (5, 137) which has a pressure supply port (7, 119), a working port (9, 121), and a drain port (11, 123), in the valve housing (5, 137) there being a main valve piston (15, 125) which can be moved by a pilot stage (13, 141) for control of the fluid flow between the pressure supply port (7, 119) and the working port (9, 121), with the pilot stage (13, 141) having a valve closing element (43, 151) for a pilot chamber (41, 163), with the valve closing element (43, 151) being movable from an open position (OS) into a closed position (SS) by an actuating apparatus (45, 149), characterized in that the valve closing element (43, 151) can actuate a leakage reduction stage (53, 157).
Dependencies are inferred from the claim text.