Electric actuators can be used to operate large-diameter valves as well as small-diameter valves. The news about which electric actuator is good supply frequently caused huge sensation, and the reason for the oscillation of the electric actuator was not only the fluctuation of the measured parameter, which caused the output of the inverter to oscillate, but also possibly because the user adjusted the PID parameters improperly. And the excessive flow characteristic of the regulating valve causes the loop to oscillate.
