Control valve for devices hydraulically adjustable from a line system under pressure, in particular the water-line network

摘要

A control valve for devices which are hydraulically adjustable from a line system under pressure, e.g. the water-line network, comprises a housing with a slide adjustable therein, preferably a rotary slide valve, which is suitable for blocking in its various, alternatively adjustable positions a number of connections at the housing or for connecting them to one another in alternating combination. In a neutral postion the connection between the line system and the hydraulically adjustable device is blocked; in a first operating position this connection is open and at the same time the connection to a discharge accessible via a pressure-relief valve is made; in a second operating position the connection to the line system is blocked and the hydraulic device is connected to the said discharge via the pressure-relief valve; and in a release position the hydraulically adjustable device is directly connected to a discharge.