water ring vacuum pump Note for selecting

I. determination of water ring vacuum pump type

The type of water ring vacuum pump is mainly determined by the medium pumped, the amount of gas required for work, the degree of vacuum or the exhaust pressure.
After the water ring vacuum pump works normally, two points should be noted:
Vacuum pump is used in petrochemical industry

1, as far as possible demands the selected vacuum degree of vacuum pump in efficient interval, which is the critical need critical area of the exhaust pressure or vacuum operation, so as to ensure the vacuum pump according to the conditions and requirements to work properly. Avoid operating near the maximum vacuum degree or maximum exhaust pressure range of the vacuum pump. Operating in this area, not only is the efficiency extremely low, but also the work is very unstable, easy to make the vacuum pump vibration and noise. For vacuum pumps with high vacuum degree, cavitation often occurs during operation in this area. The obvious phenomenon is noise and vibration in the vacuum pump. Excessive cavitation will lead to damage of pump body, impeller and other parts, so that the vacuum pump can not work properly.

Liquid-ring-vacuum-pump-system-workflow

It can be seen that when the vacuum degree or gas pressure required by the vacuum pump is not high, it can be selected from the single-stage pump first. If higher requirements for vacuum or exhaust pressure, single pump often can not meet, or demand under the condition of high vacuum pump still has large volume, which requires performance curve at higher vacuum degree is relatively flat, can choose two stage pump. If the vacuum degree is above -710mmhg, the roots water ring vacuum unit can be selected as the vacuum extraction device.

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

If selected or vacuum unit type vacuum pump, also need to according to the swept volume required by the system to choose the right model (on the extraction rate of vacuum equipment selection and extraction time can refer to a single product of our company introduction).Main parameters of vacuum pump