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First, determine the type of water ring vacuum pump
The type of water ring vacuum pump mainly depends on the media used, the volume of gas required for operation, the degree of vacuum or the discharge pressure.
Water ring vacuum pump after normal work need to pay attention to two points:
1. To the extent possible, the vacuum level of the selected vacuum pump is required to operate in the high-efficiency zone, ie in the area of ​​the critical required or critical required discharge pressure in order to ensure that the vacuum pump will function properly according to the required conditions and requirements . Should be avoided in the vacuum pump maximum vacuum or maximum exhaust pressure near the range of operation. Operating in this area is not only inefficient, but also unstable and prone to vibrations and noise in the vacuum pump. For vacuum pumps with higher vacuum, cavitation often occurs within this area, and the obvious phenomenon that causes this phenomenon is noise and vibration in the vacuum pump. Excessive cavitation will lead to damage to the pump body, impeller and other parts, so that the vacuum pump can not work properly.
It can be seen, when the required vacuum pump vacuum or gas pressure is not high, you can preferentially selected in the single-stage pump. If the vacuum or exhaust pressure requirements are high, the single-stage pump often can not meet, or require the pump at higher vacuum conditions still have a larger amount of air, which requires the performance curve at a higher degree of vacuum is relatively flat, Use two pumps. If the degree of vacuum above -710mmHg, optional Roots water ring vacuum unit as a vacuum device.
2, according to the amount of system exhaust required to select the right vacuum pump
If you have selected the type of vacuum pump or vacuum unit, you also need to select the correct type according to the amount of bleed air required by the system.
Select water ring vacuum pump considerations
Select water ring vacuum pump considerations