Valves in action -
Pilot-operated pressure reducing valve RP 814
Pressure reducing in a pumped storage station

The pumped storage station built as an underground station near a reservoir uses the height difference of about 360 m between the upper and the lower basin to generate energy and / or to compensate peak system loads. In case of failure of the electrical systems emergency cooling water for the turbines and extinguishing water in case of a fire can still be provided. The inlet pressure always amounts to abt. 36 bar owing to the height difference between the upper basin and the engine room. To protect the pipelines and plant components that are designed for a pressure rating of PN 16, a self-acting and pilot-operated pressure reducing valve of the RP 814 type is used. It features utmost regulating accuracy with highest flow rates. The RP 814 valve reduces the water pressure from 36 to 8 bar also in this case in an extremely reliable way.