Centrifugal Blower Selection Principle by Xianrun Blower

How to select a suitable blower to you?  By Xianrun Blower

1. Selecting high efficiency, small size, large adjusting range centrifugal fans, meet acceptable performance, efficiency and quality requirements;

2. The centrifugal blower working point need to be near efficiency running point, to ensure the stable operation, avoid the fan works in surge area;

Xianrun Blower centrifugal fan performance curve

3. Reducing noise by decreasing the centrifugal fan speed and selecting bigger size blower;

4. If selecting oversize blower, the blower will works in small air volume area, pressure difference is big between air inlet and outlet, causing operation instability and high impulsive noise;

5. If selecting undersize blower, the fan will increase rotation speed, the air will have higher speed after leaving the blades, also causing higher noise;

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6. In general, the average wind speed in fan air outlet is at 10 ~ 15 m/s, can not be more than 17 m/s;

7. The fan speed is less than 450 RPM, selecting 8 poles motor; 451 ~ 799 RPM, selecting 6 poles motor; 800 ~ 1500 RPM, selecting 4 poles motors; more than 1500 RPM, selecting 2 poles motors.

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