The system usually consists of a box. a set at pump. a set of electrical mixer. can also be designed as structures at one box.two sets of pump: two boxes. two sets at Pump: two boxes. multi sets at pump: multi boxes. multi sets of pump. It boasts high security and stable performance. and is convenient for transportation. installation and maintenance. Electrical control box or centralized control (remote/auto control) can be chosen. it is used tor making liquid-liquid. solid liquid. gas-liquid solution and for quantitative transferring of flocculant. coagulant aid. antifoamer and disinfectant in waste water treatment.