System separator with drain valve and output side backflow preventer

摘要

System separator with an inlet-side non-return valve for interrupting a connection for a liquid between a pre-pressure zone (2) and a central zone (14), an outlet-side non-return valve (13) for interrupting a connection for a liquid between the central zone (14) and a back pressure zone (3) and a drain valve for draining the central zone (14) from the liquid, wherein each of the input side check valve (13), the output side check valve, and the drain valve comprises a lock member (78) and a valve seat which are movable against each other to make and break the connections in which the blocking element (8) of the discharge valve and the blocking element (7) of the inlet-side non-return valve are firmly connected to one another.