Fine small electric control valve is an advanced automatic valve, widely used in various industrial fields. It can accurately control parameters such as fluid flow, pressure and temperature, and realize automatic adjustment. This article will detail the fine small electric control valve working principle, selection and application.

1. working principle
The fine small electric control valve is composed of electric actuator and control valve. The control valve is opened and closed by the electric actuator to realize the adjustment of fluid parameters. Electric actuators usually use servo motors, stepper motors or DC motors and other driving methods. Through transmission mechanisms such as reducers or gearboxes, electrical signals are converted into mechanical displacement to drive the valve core of the regulating valve to move.
The valve core of the regulating valve is usually spherical, conical or cylindrical, and the fluid flow can be adjusted by changing the gap between the valve core and the valve seat. When the valve core moves, the fluid medium passes through the throttle of the regulating valve to generate a pressure difference, thereby changing the fluid flow, pressure or temperature and other parameters.

2. selection
In the selection of small electric control valve, need to consider the following factors:
1. Fluid medium: understand the nature of fluid medium, such as temperature, pressure, viscosity, corrosiveness, etc., in order to select the appropriate material and sealing structure.
2, flow and pressure: according to the actual demand to determine the flow and pressure range, select the appropriate specifications and models.
Control accuracy: The higher the control accuracy, the better the adjustment performance. According to the actual needs to choose the appropriate control accuracy.
4. Power and control signals: Understand the requirements of power and control signals to ensure that they match the control system.
Installation and maintenance: consider the installation space, pipe connection, maintenance and other factors to ensure that the valve can be easily installed and used.
6. Brand and quality: Choose well-known brands and reliable quality control valves to ensure stable performance and long service life.
7. Price and service: On the premise of meeting performance requirements, consider factors such as price and service, and choose products with high cost performance.

3. application
Widely used in various industrial fields, such as chemical, petroleum, pharmaceutical, food, etc. In chemical production, it can be used to control the temperature, pressure and flow in the process of chemical reaction; in oil exploration, it can be used to control the oil and pressure produced by oil wells; in pharmaceutical and food processing, it can be used to control the flow and temperature of materials and other parameters.
In short, fine small electric control valve as an advanced automation valve, has a wide range of applications. By understanding its working principle, selection and application, we can better select and use this valve, so as to realize automatic control and improve production efficiency.