It is mainly composed of three parts: CAM rotor, shaft seal and gear box. A pair of synchronous transmission gear drives the CAM rotor to rotate to realize the transmission of media. The shaft seal can be designed as packing seal and mechanical seal according to different working conditions. Adopt high strength cast iron gear box, helical gear and heavy load bearing to ensure long life. The main part is box assembly, rotor clearance can be adjusted without removing the gear box.