Control valve controller

Comparing the detected transmission link output standard signal and the setpoint signal, the deviation signal, op, op send the output actuators according to a certain control law on the deviation signal (errorsignal). Controller for availability analog meter to achieve, also available digital microprocessor controller, e.g. PID control function block employed in the DCS and FCS.
The final position of the actuator (actuator) in the control loop, also known as the final element of the (final element). The actuator is used for receiving the controller output signal, and control the change of the manipulated variable. In the majority of industrial process control applications, the actuator control valve. In recent years, with the application of frequency conversion technology, some of the control system using the inverter and the motor (pump) equipment consists of actuators. This page describes the control valve, does not discuss the inverter and other actuators.air cylinder manufacturers
The change of the load of the production process or when operating conditions change, by detecting the detection and transmission of the element and the transmitter, the controlled variable of the process to send the controller to send the output of the actuator by the operator of the control law, the change process in the corresponding fluid flow, so the controlled variable settings to be consistent. Seen, the detector element and transmitter similar to the human eye, the role of the controller is similar to the human brain, the role of the actuator similar to the hands and feet. The quality of each of the components of the control system composed of a control system, depending on the weakest link of the control system components.electric solenoid valve