All of the control valve, valve control systems and for positioning a control valve actuated by an actuator of the control valve, and,Method for positioning a control valve

摘要

"Set of control valve, valve control systems and for positioning a control valve actuated by an actuator of the control valve, and,Method for positioning a control valve. It is introduced a control system for positioning a control valve.The control system employs first and second closed circuit control, and a set of plug and valve seat.The first closed circuit control monitors a position or variable of the valve or device being controlled, and compares this value with wn setpoint supplied.To generate a setpoint for the valve plug and seat.The second closed circuit control compares the measured position of the valve seat with buffer and the second setpoint to generate a correction signal to precisely position the valve.Plug and seat. Through the employment of the first and second closed circuit control, improve the accuracy and the ability of reaction in which the control valve is positioned.