Description of the type and working status of the vacuum system

Vacuum systems are used in a wide variety of processes and are available in a wide variety of processes. According to the state of the vacuum system pumping process, it can be divided into two basic types, an open vacuum system and a closed vacuum system.

    The so-called open vacuum system, just as there is gas flow in the system, the pressure varies from place to place, there will be a pressure difference between the sections in the system, and the final stage vacuum pump will be pumped to the atmosphere.

    In the closed vacuum system, the pumping device is closed to the pumped container. At the beginning of the pumping, there will be a pressure difference in the system, and there will be gas flow. However, when the dynamic balance is reached, the pressures in the system are almost equal. The main feature is that no gas is discharged from the system to the atmosphere outside the system. .

    If you press the working pressure of the system, you can have a rough vacuum system, a low vacuum system, a high vacuum system, an ultra high vacuum system, and an extremely high vacuum system.

    According to the cleaning system of the vacuum system, there will be an oil vacuum system and an oil-free vacuum system.

    Due to people's habits, the above different classifications are often combined in practical applications, such as "large dynamic metal high vacuum system" and "oil-free ultra-high vacuum system". Therefore, the above classification method is not strictly constant, and it is often referred to as the atmosphere in conjunction with the characteristics of the vacuum system, and may be more applicable.

    Why classify the vacuum system? Its purpose is to find out the specificity of similar vacuum systems to guide the design, manufacture, assembly and use of various vacuum systems.