VALVE SYSTEM FOR DRAINING LIQUID ENVIRONMENT AND METHOD OF CONTROL OF VALVE SYSTEM

摘要

The invention relates to a valve system for discharging a liquid medium including an inlet, an outlet located in an integrated state between the inlet and outlet, a controlled valve that prevents the flow, and a control device that is configured to open or close the valve that prevents the flow, for the flow of a liquid medium, characterized in a built-in state between the inlet and outlet and in the direction of gravity, essentially above the valve, a flow-preventing valve, a backflow preventer, which has an inwardly directed reverse flow outlet in the built-in state in the direction of gravity substantially downward, and also characterized in that the control device is configured to shut off the flow-preventing valve, thus so that the residual fraction of the medium to be discharged in the direction of gravity, essentially above the valve preventing the flow, forms a barrier layer, the surface of which is located in the direction of gravity, essentially wu, above the backflow outlet of the valve, which prevents backflow.