| 摘要 |
A control system for a double-seat solenoid valve variably adjusts the excitation current of the solenoid and taken into account the opening forces required at any given time by varying upper and lower current values, the mean current ensuring the tightness of the double-seat valve (5) when the valve is in its central position. In this manner, after-flow of pressure medium is stopped whenever the input signals have stopped. <IMAGE> |
