To feed evaporator with softened or desalinated water (pressure > 1 bar) and the cooling coil (pressure > 3 bar) with phosphate treated or normal tap water. The supply of cooling- and pretreated water is controlled automatically by the device. Efficiency of the still is reduced by approx. 10 to 15 %. This accessory must definitely be installed in our factory.
Type 2909: pretreated water is automatically switched off by the magnetic valve when the storage tank is full.