In a valve having at least one connection P for a pressure medium source and a connection A for the supply of pressure medium to a consuming device, at least one control valve element actuated by a pressure medium to provide a P/A connect/disconnect function and having a movable valve body which cooperates with a valve seat and is connected to a pressure chamber, a first servo valve element, MULTI-FUNCTIONAL WATER PUMP CONTROL VALVEan inverter valve element actuated by said pressure medium via said servo valve element, and an actuating piston which in a first switch position allows the pressure medium to pass from the pressure medium connection P to said pressure chamber, thus breaking the connection between the connections P and A, and in a second switch position draws off the pressure medium from the pressure chamber of said valve element, thus producing a connection between the connections P and A in which a pressure chamber of said first servo valve element is connected to the pressure chamber of said inverter valve element via a connecting channel, the improvement comprising a connecting channel between said connection A and said connecting channel leading from the pressure chamber of said first servo valve element to the pressure chamber of said inverter valve element, a second servo valve element means for drawing off the pressure medium from the pressure chamber of said inverter valve element, Water Pump Control Valvesand means for actuating said second servo element in response to an impulse for switching said inverter valve element over to said first switch position.

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2011-11-30

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