The working pressure of the selected stainless steel vacuum pump should meet the requirements of the vacuum equipment's limit vacuum and working pressure; each pump has a certain range of working pressure, and the working point of the pump should be selected to work within this range; check and determine the type and amount of pumping required by the process. The details are as follows:
The characteristics of gas are analyzed, such as corrosiveness, cohesion and so on. Because if the type of pumped gas reacts with the liquid in the pump, the pump system will be polluted. At the same time, it must be considered to determine the appropriate exhaust time and the gas footprint generated during the exhaust process.
Stainless steel vacuum pump under its working pressure should be able to remove all the gas produced in the process of vacuum equipment, and determine the vacuum volume of the system. Check to determine the time required to achieve the required vacuum, the flow resistance and leakage of the vacuum pipeline. Considering that the required vacuum degree can be achieved and the required pumping rate can be maintained under certain technological conditions, the proper stage ratio between the main pump and the front pump can be determined by incorporating the stainless steel vacuum pump correctly, and the shorter and thicker pipelines should be adopted as far as possible in the design of the vacuum pipeline, and the general diameter of the pipeline is not less than the inlet of the stainless steel vacuum pump.
In the design of stainless steel vacuum pump system, the sealing property of the system should be improved and the leakage rate of the system should be reduced. The proper sealing material should be selected, and the actual volume of gas pumped by stainless steel vacuum pump is related to the working liquid. The higher the working fluid is, the higher the steam partial pressure is, the worse the condensation effect of the working fluid on the inlet steam of the vacuum pump is, and the smaller the volume flow of the pumping gas of the stainless steel vacuum pump is. It is suggested that the working fluid with lower saturated vapor pressure should be selected. At the same time, it is necessary to control the temperature of working fluid; for extracting the gas with high solidification point, in order to avoid the gas entering the pump body to condensate and deposit, it is necessary to increase the temperature of the pump, such as heating nitrogen to increase the temperature of the pump; new technology should be adopted in the design of stainless steel vacuum pump system to achieve automatic control and interlocking protection.
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