The volume pump can be divided into a refraction pump, a plunger pump, a rotor pump, a screw pump, a diaphragm pump

The re -pump is also a piston pump. The piston pump is divided into multi -cylinder and single -cylinder.

The plunger pump can be divided into multi -cylinder and single -cylinder.

The rotor pump can be called the gear type, and the gear type is divided into external mesh and internal mesh.

The screw pump can be divided into three screw pumps, double screw pumps, and single screw pumps.

The diaphragm pump can be divided into pneumatic diaphragm pump and electric diaphragm pump.