... /cm,two stage around 2-3 us/cm,EDI ≤ 0.5us/cm (base on raw water ≤ 300us/cm. 4,imported parts account for 90 ... , provide pure water for filling in food, beverage or medicine making area. (4) source water is to be filted by quartz sand ... time, we can install Ultra Violet(UV) and ozone machine on the machine for killing germs, bacteria, so that keeping pure water ...