Vacuum pump selection is the most important type of pump type, the type of pump is mainly determined by the amount of gas required by the job, vacuum degree or exhaust gas pressure, pump work should be avoided in the maximum vacuum or near the maximum exhaust pressure operation. In this area, not only the efficiency is very low, but the work is not stable, it is easy to produce vibration and noise. For the vacuum pump with a high degree of vacuum, the operation of this area is often the phenomenon of cavitation, the obvious sign of this phenomenon is that there is noise and vibration in the pump. Cavitation will cause the pump body, impeller and other parts of the damage, so that the pump can not work. And the vacuum pump as far as possible in the high efficiency area, that is, in the critical vacuum degree or the critical exhaust pressure of the regional operation.
Let us know about the selection of the vacuum pump need to pay attention to the seven elements
1, the ultimate pressure of the vacuum pump should meet the working pressure of the process. The limit pressure of the pump is usually selected for about an order of magnitude lower than that of the process.
2, each pump has a certain working pressure range, therefore, the working point of the pump should be selected in this range, but can not allow it to allow the work of the pressure to work with foreign minister.
3, the vacuum pump in the work pressure, should be able to exhaust the vacuum equipment process to produce the full amount of gas.
4, the vibration of the vacuum pump to the process and the environment has no effect, if the process is not allowed, should choose no vibration pump or take anti vibration measures.
5, to understand the smoke gas composition, gas containing non - containing steam, there is no particles of dust, corrosive, etc.. When selecting a vacuum pump, you need to know the composition of the gas. If the gas contains steam, particles, and corrosive gases, it should be considered in the pump inlet pipe on the installation of auxiliary equipment, such as condenser, dust collector, etc..
6, when selecting the oil seal vacuum pump, to consider the vacuum pump exhaust the oil vapor (smoke) on the environment. If the environment does not allow pollution, we should choose a non oil vacuum pump, or the oil vapor into the outdoor.
7, select the vacuum unit: when using a vacuum pump can not meet the requirements of pumping gas and vacuum, it is required to combine several pump, complement each other to meet the process requirements.