The type of water ring vacuum pump is mainly determined by the pumped medium, air volume required for operation, vacuum degree or exhaust pressure.
There are two points to pay attention to after the water ring vacuum pump works normally:
1. As far as possible, the vacuum degree of the selected vacuum pump is required to operate in the high efficiency range, that is, in the critical vacuum degree or the critical exhaust pressure area, so as to ensure that the vacuum pump can work normally according to the required conditions and requirements. Operation near the maximum vacuum degree or the maximum exhaust pressure range of the vacuum pump shall be avoided. In this area, not only the efficiency is very low, but also the work is very unstable, which is easy to make the vacuum pump produce vibration and noise. For vacuum pumps with high vacuum degree, cavitation often occurs when they operate in this area. The obvious phenomenon is noise and vibration in the vacuum pump. Excessive cavitation will cause damage to pump body, impeller and other parts, so that the vacuum pump can not work normally.
It can be seen that when the vacuum degree or gas pressure required by the vacuum pump is not high, it can be selected preferentially in the single-stage pump. If the requirements for vacuum degree or exhaust pressure are high, the single-stage pump is often unable to meet the requirements, or the pump is still required to have a large amount of gas under the condition of high vacuum degree, that is, the performance curve is required to be relatively flat under the condition of high vacuum degree, so the two-stage pump can be selected. If the vacuum degree is required to be above - 710mmhg, roots water ring vacuum unit can be selected as the vacuum pumping device.
industrial vacuum pumps,vacuum furnaces
Roots vacuum pump
Liquid Ring Vacuum compressor
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