A position controller (servomechanism) that is mechanically
connected to a moving part of a final control element or its actuator and that automatically adjusts its output to the actuator to maintain a desired position in proportion to the input signal Pneumatically operated valves depend on a positioner to take an input signal from a process controller and convert it to valve travel.
– The valve positioner is a controller which can synchronize the
command signal and its corresponding valve step position.
– By use of valve positioner, hysteresis can be overcome
Actuators and Positioner
Re: Actuators and Positioner
