Because the functions of various vacuum pumps are different except that they can meet the matching points for vacuuming the container. Therefore, when choosing, it is necessary to understand that the working role of the pump in the vacuum system is very important. The role of the pump in various working fields is mainly summarized in the following aspects.

1. As the main pump in the system
The so-called main pump is a vacuum pump that directly evacuates the pumped container of the vacuum system to obtain a vacuum degree that meets the requirements of the process.

2. Rough pump
The rough pump refers to a vacuum pump that reduces the pressure of the vacuum system from the beginning of atmospheric pressure to another pumping system that can start work.

3. Foreline pump
The foreline pump refers to a vacuum pump used to maintain the foreline pressure of another pump below its highest permitted foreline pressure.

4. Maintain the pump
The maintenance pump means that the main backing pump cannot be used effectively when the pumping of the vacuum system is very small. To this end, a vacuum pump with a smaller pumping rate to help the backing pump to maintain the normal operation of the main pump or maintain the high pressure required for the empty container is equipped in the vacuum system.

5. Rough vacuum pump or rough vacuum pump
The rough and rough vacuum pump refers to the vacuum pump that starts from the atmosphere and reduces the pressure of the pumped container and works within the scope of low vacuum or rough vacuum pressure.

6. High vacuum pump
High vacuum pump refers to a vacuum pump that works in the field of high vacuum.

7. Ultra-high vacuum pump
Ultra-high vacuum pump refers to a vacuum pump that works in the ultra-high vacuum field.

8. Booster pump
The booster pump usually refers to the vacuum pump that works between the low vacuum pump and the high vacuum pump to increase the pumping capacity of the pumping system in the central pressure range or reduce the pumping speed of the backing pump.