Wrong air volume regulation of Roots blower

The air volume of Roots blower has always been a problem of great concern. When roots blower is used, the air volume will be too small or too small, and many friends will have wrong operation, which will lead to various faults of the fan. Let's take a look at the wrong posture first
Wrong posture 1:
The air volume can be adjusted by controlling the gate valve, so that the roots blower is easy to overpressure and burn the motor.
Wrong posture 2
When the air volume is increased and the pipe diameter is changed, the effect is 0.
Wrong posture 3
Without knowing the reason why the air volume becomes smaller, blindly adjust the various accessories of the fan.
Wrong posture 4
It is easy to make wrong judgment if only checking the fan and not checking other places.
In the case of unknown fault reasons, blind adjustment of Roots blower is most likely to cause such and such problems. In view of the above situation, what is the correct posture?
Correct posture 1: judge the reason of air volume change
After the installation of fresh air fan, the air volume and air pressure of Roots blower will change to a certain extent. This is often the case for new equipment in the running in period. After the running in period, the data of Roots blower will stabilize, which is a special case.
Check pipes and fans for insufficient air volume;
If the air volume is too large, check the fan. The disadvantage of large air volume is high power consumption, that is, if the model is selected as large, the air volume is large. If you don't want to change the model, you can install an overflow valve to reduce the air volume.
Correct posture 2: adjust the air volume
Remember the following three things:
1. Reduce the air volume: change the speed (frequency), increase the relief valve;
2. Increase the air volume: change the speed (frequency), clean the inlet and outlet pipes;
3. Change the fan model.
Correct posture 3
When we understand the main reason for the change of fan air volume, then according to the specific situation, adjust the air volume, do not operate blindly.
matters needing attention:
Belt drive, adjust the air volume, can be carried out by changing the pulley;
Direct drive can be equipped with frequency conversion control cabinet. Huadong motor recommends that customers who use non frequency conversion motor do not force frequency conversion.
Belt drive can also adjust the air volume by adding control cabinet, but it is not cost-effective.

Related products:

Metal surface processing water ring vacuum pump