Rotor pumps are a form of positive displacement pump. It is composed of a rotating rotor and a stationary pump body. It has no suction and discharge valves. The working volume is changed through the relative movement between the rotor and the pump body, and the liquid is discharged by the extrusion of the rotating rotor, while leaving a hole on the other side. out of the space, forming a low pressure, allowing the liquid to be continuously sucked in. Most rotor pumps are lubricated by the liquid they transport, so they are generally suitable for transporting liquids that are lubricating and do not contain solid particles.