A valve electric actuator is a device that uses electric power to control the opening and closing of valves. It consists of a motor, a gearbox, a control module, and other components. The control module receives signals from the control system and drives the motor to rotate, which in turn drives the valve stem to move, thereby controlling the degree of valve opening and closing.
The development of valve electric actuators is closely related to the progress of industrial automation. In the early days, valves were mainly manually operated, which was labor-intensive and had low control accuracy. With the development of electronics and motor technology, electric actuators began to be applied to valve control. In the past few decades, the technology of valve electric actuators has been continuously improved, and their performance and reliability have been greatly enhanced.
The main purpose of valve electric actuators is to control the flow of fluids (such as water, oil, gas, etc.) in pipelines. They can be used in various industrial fields, such as petroleum, chemical, power, water treatment, and so on. By accurately controlling the opening and closing of valves, valve electric actuators can achieve functions such as flow regulation, pressure control, and temperature control.
The working principle of valve electric actuators is based on the conversion of electrical energy into mechanical energy. When the control module receives a control signal, it sends a corresponding voltage or current to the motor. The motor rotates according to the received signal, and the rotation speed and direction of the motor are controlled by the control module. The motor output shaft is connected to the gearbox, and the gearbox reduces the speed and increases the torque to drive the valve stem to move. The movement of the valve stem causes the valve disc to move, thereby changing the flow area of the valve and achieving the control of fluid flow.
Some common terms related to valve electric actuators include: