The performance of the vacuum pump depends on its mechanical structure and the quality of the engine oil. When distilling volatile organic solvents, the vapor pressure of organic solvents will increase due to oil absorption, thus reducing the pumping efficiency; If it is acid gas, it will corrode the oil pump; If it is water vapor, it will make the pump into emulsion and damage the vacuum pump.

Vacuum pump installation, its role is to extract gas molecules from the vacuum chamber, reduce the gas pressure in the vacuum chamber, to achieve the required vacuum. Generally speaking, there is a wide range from atmosphere to extremely high vacuum. So far, no vacuum system can cover this range. Therefore, it should be based on the process index, work efficiency and equipment service life requirements of different products.

Choose different vacuum system configuration to meet different vacuum requirements. In order to get a good configuration, the following points should be considered when selecting the vacuum system: first, the vacuum required for each process must be checked and determined. Since each process has its own suitable vacuum range, it must be carefully studied and determined. The limit vacuum of the system determines the good working vacuum of the system.

Therefore, on the basis of determining the process requirements of the vacuum system, the vacuum pump system was checked. Check and determine the extraction volume and type required by the process. If the type of gas pumped reacts with the liquid in the pump, the pump system will be polluted. When determining the pumping volume, the appropriate pumping volume must be considered.

Test and determine the time required to reach the required vacuum, the flow resistance and leakage of vacuum pipeline. In consideration of the required vacuum degree, under certain process conditions, maintain the required vacuum pumping rate. An absorption device must be installed between the distillation system and the vacuum pump. Before distillation, the organic solvent vapor in the system must be completely removed by pump.