What are the characteristics of roller PAC? PAC products compared with other coagulants, has the following advantages: l, a wide range of applications, to adapt to a wide range of water. 2, easy to quickly form alum, precipitation performance. 3, a wide range of suitable PH value (5-9), and the water after treatment PH value and alkalinity decreased small. 4, the water temperature is low, can still maintain a stable precipitation effect. 5, alkalinity than other aluminum salts, iron salts, the role of small equipment erosion. With the improvement of people's demands for water quality, our factory adopts the method of adjusting formula and improving process according to the raw water quality monitoring archives materials of both algae and trace chemicals, which are all over the north and south of our country, with high temperature and high eclipse, low temperature and low eclipse, Aluminum manufacturers developed a series of aluminum chloride products: polyaluminum chloride, basic aluminum chloride, ferric chloride, aluminum sulfate, such as composite iron.