ZJRP pneumatic membrane eccentric rotary valve (cam deflection regulating valve) is composed of an actuator and an eccentric rotary valve, which is a kind of angular steer regulating valve that rotates part of the ball valve plate around the eccentric axis to control the fluid. The slewing center of the spool is not concentric with the rotating shaft, which can reduce wear and extend the service life, and there is a guide wing at the rear of the spool, which is conducive to stable flow of fluid and has good stability. Secondly, there are also the characteristics of large flow rate and wide adjustable range. This series of control valves are widely used in petroleum, chemical, electric power, metallurgy, steel, papermaking, medicine, food, textile, light industry and other industries.