An electric single-seat control valve consists of a valve body, a valve plate (or piston), an actuator, and a control system. In an electric control valve, the actuator is the core component. It receives signals from the control system and drives the valve plate (or piston) to adjust parameters such as flow rate and pressure of the medium.
When the control system outputs a signal to the actuator, the actuator will perform a corresponding action, converting rotational motion into linear motion through transmission components such as connecting rods and cranks, pushing the valve plate (or piston) up and down. The up-and-down movement of the valve plate (or piston) changes the flow area of the valve port, thereby regulating the flow rate of the medium. Simultaneously, the position signal of the valve plate (or piston) is fed back to the control system, forming a closed-loop control circuit to ensure the accuracy and stability of the regulation.