Positioner  rotork

A positioner is a control valve accessory used to precisely position the valve plug or disk in response to an input signal from a process controller. The positioner receives a signal from the controller indicating the desired position of the valve and then adjusts the position of the valve accordingly. This helps to ensure that the valve is functioning correctly and can help to optimize the performance of the overall process. Positioners can be either pneumatic or electronic and may be integrated into the valve or installed as a separate device.