Cam rotor pump helical rotor pumps rotor stator pump belongs to positive displacement pump and has the advantages of outstanding self-priming ability, high efficiency, and long life. It applies to delivering suspension liquid with soft solid particles, corrosive medium and suspension liquid. The delivered medium temperature range from -30~130℃ and viscosity range from 30cst to 1.0×105cst. The parts of contact with medium adopt stainless steel. The rotating speed can be adjusted according to the delivered medium's physical property.