Vacuum system is composed of vacuum chamber, vacuum pump or vacuum unit, vacuum pipeline, vacuum valve, trap and other vacuum components, electrical control system, etc. it is widely used in electronic semiconductor industry, photoelectric backlight module, mechanical processing and other industries. Vacuum system is often composed of several vacuum pumps, which play a role in different fields according to their characteristics.
1. Main pump
The main pump is used to obtain the required vacuum degree to meet the specific process requirements of the vacuum pump. According to the different limit pressure required by the vacuum system, the limit pressure of the main pump in the selection process is generally half to an order of magnitude lower than the limit pressure required by the system.
2. Crude pump
Crude pumping pump is a vacuum pump that starts pumping at atmospheric pressure and reduces the pressure of the pumped system to that of the main pump system.
The pressure reached by the crude pump must be less than the starting working pressure of the main pump. The crude pump can also be used as a pre-stage pump.
3. Front pump
The former stage pump is a vacuum pump which maintains the pressure of the former stage of a pump lower than the critical pressure of the former stage. The pre pump can also be used as a crude pump, but it must meet the requirements of pre pumping time and vacuum degree.
At the same time, the pre vacuum condition required for the operation of the main pump shall be met by the pre stage pump; under the maximum allowable exhaust pressure of the main pump, the pre stage pump must discharge the maximum amount of gas discharged by the main pump in time, and the pumping speed of the pre stage pump shall be in accordance with the actual pumping speed of the pump at the actual inlet pressure.
4. Maintenance pump
Maintenance pump means that when the air volume in the vacuum system is very small, it can not effectively use the previous pump. Therefore, an auxiliary pump with a smaller pumping speed is equipped in the vacuum system to maintain the normal operation of the main pump or the low pressure vacuum pump required by the evacuated system.
How To Select Vacuum Pump In Chemical Industry
Water Ring Vacuum Pump
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