Different intelligent valve positioners have the same structure and function, and also have their own characteristics.
 
　　Their common places are:
　　As a standard valve positioner, it can be widely used in the position control of various process control valves with pneumatic actuators;
　　As a process controller, an intelligent regulating valve is formed with a valve with a pneumatic actuator. It can directly receive the real-time process value signal of the sensor, and together with the sensor form a relatively independent complete process control loop to realize the closed-loop control function;
 
　　It can be combined with valves of straight-stroke pneumatic actuators such as angle seat valve, globe valve, diaphragm valve, etc., and adopts external line position sensor to form valve positioning control system; and can also be combined with angular stroke pneumatic actuator valve such as: ball valve, Butterfly valve, and diaphragm type pneumatic regulating valve, etc., adopt built-in angular stroke sensor to form valve positioning control system;
 
　　It can be used for single-acting actuator valves, such as normally open or normally closed valves, as well as valves or cylinders for double acting actuators;

 
　　It can be equipped with an analog position feedback output and two binary output signals. The position feedback signal can feed back the actual position or actual process value of the valve to the PLC or controller to facilitate system information acquisition and monitoring. The binary output signal can expand the control function of the regulating valve and improve the automation of the system;