dissolved a varity of substances to get clean water. it is a necessary equipment in water treatment system. it uses a varity of media to filter out impurities from water. when using different media, you can get different filtering effect. when loading manganese sand, you can effectively remove iron and manganese compounds. when loading quarts sands, no coal, you can effectively remove mixture and colloid, etc. It is widely used in many industries as the beginning of the source water and purification, transparent, drinking water glycol, it has simple operation and maintenance, tolerance and the unclean capacity, you can use the backwash, high-quality stainless steel, comply with food hygiene requirements.