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The double water stili designed for obtaining very pure water out of water containing dissolved mineral salts and gases by double distillation. Apparatus is intended for use in laboratories and health seNice centres.

The double water stili is free-standing apparatus designed for continuous operation. lt consists of a primary evaporator boiler and a secondary evaporator boiler which are separated by the set of
coolers. All parts in contact with water or steam are coated with pure tin and all parts being in contact with distillate. its steams and double distillate are silver-coated. The double water stili is equipped with a flow controller that keeps the flow of water supply on the level that makes the lowest water consumption possible together with nominal performance of double distillate. The double water stili is equipped with safety devices which protect apparatus against damage in case of any disturbance in water supply:
- pressure sensor that cuts off the power if the water supply pressure drops below the pressure level indispensable for correct performance of the apparatus
- water level sensors that cut off the power if the water level in boilers is lowered.