Precautions for selecting a water ring vacuum pump

First, the determination of the type of water ring vacuum pump

The type of water ring vacuum pump is mainly determined by the pumped medium, the amount of gas required for operation, the degree of vacuum or the exhaust pressure.

There are two points to note after the water ring vacuum pump works normally:

1. As far as possible, the vacuum degree of the selected vacuum pump should be required to operate in the high efficiency range, that is, in the area of ​​critical required vacuum or critical required exhaust pressure, so as to ensure that the vacuum pump can work normally according to the required conditions and requirements. . Avoid operating near the vacuum pump's maximum vacuum or maximum exhaust pressure range. Operating in this area is not only extremely inefficient, but also unstable in operation, making it easy for the vacuum pump to generate vibration and noise. For a vacuum pump with a high degree of vacuum, cavitation often occurs in this area, and the obvious phenomenon of this phenomenon is noise and vibration in the vacuum pump. Excessive cavitation can cause damage to components such as the pump body and impeller, so that the vacuum pump cannot work properly.

It can be seen that when the vacuum degree or gas pressure required by the vacuum pump is not high, it can be preferentially selected in the single-stage pump. If the vacuum or exhaust pressure is required to be high, the single-stage pump is often unable to meet, or the pump is required to have a large gas volume at a higher vacuum, that is, the performance curve is required to be flat at a higher vacuum. Use a two-stage pump. If the vacuum is required to be above -710mmHg, the Roots water ring vacuum unit can be used as the vacuuming device.

2. Select the vacuum pump according to the amount of pumping required by the system.

If the type of vacuum pump or vacuum unit is selected, it is necessary to select the correct model according to the required pumping capacity of the system. (For the calculation of the pumping rate and pumping time of the vacuum equipment, please refer to our company's individual product introduction. ).

Various types of water ring vacuum pumps and compressors are characterized as follows, so that customers can correctly understand: