An Electro Pneumatic Positioner is used in Control Valves with pneumatically operated actuators. The pneumatic valve positioner accepts an input pneumatic signal from a control device and sends an increased or decreased output signal to a control valve to ensure the control valve plug travels correctly and is positioned properly on the valve seat. It is used to control the valve stem position from open to close position or vice versa. The Electro Pneumatic Positioner is very efficient and useful.