In the process of chemical production, can work according to the detailed process of the requested pressure fluctuation and the nature of the suction gas reasonable select vacuum pump, firstly a detailed process required working pressure, negative pressure distillation, distillation and sublimation process request high vacuum degree, low working pressure, negative pressure evaporation, boring, concentration, crystallization, dehydration, decoloring, chemical reaction absorption and walks materials such as vacuum technology request low vacuum degree of work (high pressure). work After the pressure is determined, the vacuum pump can be reasonably selected according to the size of the pump and the nature of the gas.
1. According to the working pressure reached by several vacuum pumps, the applicable scope of various vacuum pumps is listed.
2. Choose different injection vacuum pumps for different gases to be pumped
1. Water injection vacuum pump：
This pump is suitable for the working pressure is greater than 25 MMHG (3.3 KPa), suction of gases, especially in the suction setting can be vapour condenses in water (or encounter cold condense gas), with dust, granular medium, its advantage is more outstanding. When the working pressure request is relatively small and the amount of non-condensable gas is large, the combination of steam injection pump and steam injection pump and steam injection vacuum pump should be selected.
2. Series soda water injection vacuum pump：
The pump pressure can reach 2 MMHG (267 pa), but its portfolio than new high efficiency steam jet vacuum pump, soda, jet vacuum pump, multi-stage steam jet vacuum pump volume small, intermittent consumer right in small and medium-sized enterprises (smes).
3. New high efficiency steam injection vacuum pump：
The working pressure of this pump can reach 0.5mmhg(65Pa), which is suitable for a process in which a large part of the gas is condensable vapor and the proportion of non-condensable gas is relatively small.
4. Soda water combined injection vacuum pump and multi-stage steam injection vacuum pump：
Two kinds of pump working pressure can be reached within 10 pa, are capable of various suction gas, and their difference is that a combination of soda jet vacuum pump than multi-stage steam jet vacuum pump working steam consumption saving, thriftiness running costs.
If possible, kindly suggest please your working industry/process, working pressure, working medium, etc. Given detailed request helps to gain better-matched customized solution. Thanks for your patience.
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