Various of materials is soluted in water. If we need cleaning water, we must treat water, The basic way is to filter impurity in water with all kinds of medium. It can get different filtering effect adopting different filtering medium. It can effectively get rid of the mixture of Fe, Mn in water when filling ferromanaganese. It also can effectively get rid of special smell and the rest chlorine. It is widely used in primary purifying treatment in foodstuff, drink, medicine industries. It can make water pure and diaphanous. It has many advantages such as occupying small area, easy and simple operation and maintenance, large volume and revers washing. It is made of high-quality stainless steel. It is beautiful and durable. It meets the demands of food sanitation.