A vacuum valve is a valve used in a vacuum system with a working pressure below standard atmospheric pressure. The main function of the vacuum valve is to control the opening and closing of the air flow in the vacuum system in order to achieve accurate control of the vacuum degree and gas flow. The following is a detailed explanation of the vacuum valve:
First, definition and function
Definition: Vacuum valve refers to the vacuum system components used to change the direction of the air flow, adjust the size of the gas flow, and cut off or connect the pipeline in the vacuum system.
Function: Vacuum valve has a variety of functions such as cut-off, diversion, pressure regulation, shunt and so on, and is an indispensable control component in vacuum system.
Second, the working principle
The working principle of vacuum valve mainly includes the principle of mechanical structure, electromagnetic control principle and sealing principle.
Mechanical structure principle: The main components of the vacuum valve include valve, valve body, driver and so on. Through the role of the driver, the valve is opened and closed in the valve body to achieve the control of air flow.
Electromagnetic control principle: Vacuum valves usually use electromagnetic control to achieve airflow control. When the electromagnetic control signal acts on the valve, the valve will be moved by the action of the electromagnetic force, thus controlling the on-off of the gas.
Sealing principle: The sealing performance of the vacuum valve is crucial to the normal operation of the vacuum system. Therefore, a high-precision sealing structure should be used between the valve and the valve body of the vacuum valve to ensure the opening and closing of the valve and the control accuracy of the gas flow.
Third, classification and category
Vacuum valves can be divided into many types according to different classification standards.
According to the medium pressure classification: can be divided into low vacuum valves, medium vacuum valves, high vacuum valves and ultra-high vacuum valves.
Classification according to structural characteristics: including baffle valve, baffle valve, diaphragm valve and so on. Each valve has its specific structure and application scenario.
According to the driving mode classification: can be divided into manual valve, electric valve, pneumatic valve, hydraulic valve and so on. Different driving methods are suitable for different working conditions and needs.
Fourth, application field
Vacuum valves are widely used in a variety of industrial production, especially in areas where the purity of the process environment and chemical and physical stability are particularly high requirements.
Petrochemical industry: Used in chemical fiber industry, advanced grease refining and other equipment systems.
Metallurgical machinery industry: used in high alloy steel vacuum smelting, vacuum deoxidation, vacuum heat treatment and other equipment.
Nuclear industry: Various types of vacuum valves are widely used in high-energy physics and controlled thermonuclear fusion research.
Cutting-edge industries: such as semiconductors, FPD, OLED, solar and other industries, vacuum valves also play an important role.
Fifth, importance
In the vacuum system, the vacuum valve is the key component to ensure the normal operation of the system. Its good sealing performance and precise control accuracy are crucial for maintaining the vacuum degree and gas flow of the system. Therefore, in the process of design and maintenance of vacuum system, we must pay full attention to the selection and use of vacuum valves.
To sum up, the vacuum valve is a valve that plays an important role in the vacuum system, its working principle is complex and diverse, there are many kinds of classification methods, and it has a wide range of applications. In the process of design and maintenance of vacuum system, it is necessary to fully understand and master the relevant knowledge of vacuum valve.
