The working pressure of the 2be vacuum pump should meet the requirements of the process working pressure, and the vacuum degree should be higher than half to one order of magnitude of the vacuum degree of the vacuum equipment. (for example, the vacuum degree of 100 Pa (absolute pressure) is required for the vacuum process, and the vacuum degree of the selected vacuum pump shall be at least 50 pa-10 PA). Generally, if the absolute pressure is required to be higher than 3300pa, the water ring vacuum pump is preferred as the vacuum device. If the absolute pressure is required to be lower than 3300pa, the water ring vacuum pump cannot be selected, and the rotary vane vacuum pump or the vacuum pump of higher vacuum level can be selected as the vacuum obtaining device.
2be vacuum pump requires air extraction rate (that is, the capacity of vacuum pump to discharge gas, liquid and solid under its working pressure), general unit: m3 / h, L / s, m3 / min. The specific calculation method can refer to the following formula for self calculation and selection. Of course, the selection of vacuum pump is a comprehensive process, involving relevant experience and other factors.
Is the object to be pumped contaminated with rubber or oil? For different media to be pumped, corresponding vacuum equipment shall be selected. If there is a large amount of steam, particles and corrosive gas in the gas, corresponding auxiliary equipment, such as condenser, filter, etc., shall be installed on the air inlet pipeline of the pump
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