Patent ID: 10435871

Abstract:
The present invention relates to a drinking and service water supply device (1) of a building with at least one circulation pipe (3) leading to at least one consumer (12) and with a regulating valve installed in the circulation pipe, and in a coordinated aspect to a regulating valve (18) for hot-water circulation systems, comprising a valve housing (20) into which a thermostatic element (25) which is controlled by water temperature is installed as a setting member for a regulation member (30) which cooperates with a valve seat (34) with a flow opening (35) between inlet and outlet channel (21, 22) of the valve housing (20) for regulating the water flow rate. It is desired in drinking and service water supply devices that strongly cooled-down hot water is replaced as rapidly as possible by heated water to avoid, if possible, germ formation in the water and a drop of the water temperature at the consumer. For the improved solution of these problems the present invention wants to indicate a direction-dependent regulation element (37; 41, 30) which with a flow (V) through the regulating valve (18) in one direction increases the flow coefficient Cv of the regulating valve (18) independently of the position of the setting member and with a flow through the regulating valve (18) in opposite direction does not cause an increase of the flow coefficient Cv.