Device for reducing the pressure in a water supply system, especially in delivery systems for a drinking water supply, comprises a pump unit, and a generator for generating electrical energy connected to a pump shaft having an impeller

摘要

Device for reducing the pressure in a water supply system, especially in delivery systems for a drinking water supply, comprises a pump unit (2) having a different flow direction (3) to a pump operation, and a generator (6) for generating electrical energy that is connected directly or via intermediate parts to the pump shaft on which an impeller is mounted. Preferred Features: The electrical output of the generator is preferably 3 kW. The pressure is reduced from less than 10 bar, especially less than 6 bar, to less than 4 bar, especially less than 2.5 bar.