Precautions for selecting water ring vacuum pump
Date of issue:2021/8/19 15:26:28 Number of Views:
1、 Determination of the type of water ring vacuum pump
The type of water ring vacuum pump is mainly determined by the pumped medium, the 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 shall be required to operate in the high-efficiency range, that is, in the area of critical required vacuum degree 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 maximum vacuum degree or maximum exhaust pressure range of the vacuum pump. Running 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 the vacuum pump with high vacuum degree, cavitation often occurs when operating in this area. The obvious phenomenon of this phenomenon is the 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 preferentially selected from the single-stage pump. If the requirements for vacuum degree or exhaust pressure are high, the single-stage pump is often unable to meet, or the pump is required to still have a large gas volume under high vacuum degree, that is, the performance curve is required to be flat at high vacuum degree, and 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.
2. Correctly select the vacuum pump according to the air extraction required by the system
If the type of vacuum pump or vacuum unit is selected, the correct model shall be selected according to the air extraction required by the system.
1、 Determination of the type of water ring vacuum pump
The type of water ring vacuum pump is mainly determined by the pumped medium, the 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 shall be required to operate in the high-efficiency range, that is, in the area of critical required vacuum degree 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 maximum vacuum degree or maximum exhaust pressure range of the vacuum pump. Running 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 the vacuum pump with high vacuum degree, cavitation often occurs when operating in this area. The obvious phenomenon of this phenomenon is the 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 preferentially selected from the single-stage pump. If the requirements for vacuum degree or exhaust pressure are high, the single-stage pump is often unable to meet, or the pump is required to still have a large gas volume under high vacuum degree, that is, the performance curve is required to be flat at high vacuum degree, and 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.
2. Correctly select the vacuum pump according to the air extraction required by the system
If the type of vacuum pump or vacuum unit is selected, the correct model shall be selected according to the air extraction required by the system.
