An electro-pneumatic positioner is a device that helps control valves move to the right position using electronic signals. It combines the benefits of pneumatic systems (which use air) with the precision of electronic controls.

It works by converting electronic signals (like a 4-20 mA current) into air pressure, which moves the valve actuator. This controls the flow of fluids in pipelines or industrial systems. With built-in feedback and control features, electro-pneumatic positioners ensure valves operate accurately and efficiently, improving overall process performance.