How To Choose Centrifugal Fan?

The selection of centrifugal fan should also pay attention to that if it is not necessary to use multiple centrifugal fan in parallel or in series, and if it is not necessary to use multiple equipment, centrifugal fan of the same model and performance must be selected, and when using the series mode, pipeline connections must be set between the two stages of fans.
The steel frame of the centrifugal fan must be fixed on the concrete base, and porous damping rubber pads should be installed between the steel frame and the concrete base; The base of centrifugal fan shall be horizontal, firm and of certain height;
The inlet and outlet of the centrifugal fan shall be equipped with hoses made of non combustible materials to isolate the vibration of the machine body. In order to prevent the hoses sucked into the air inlet when the fan is running, the section size of the air inlet hose must be reduced; Moreover, the pipes of the air inlet and outlet should have separate supports, and the weight of the pipes should not accumulate on the fan;
Insect proof net shall be installed at the air outlet or air inlet of centrifugal fan to prevent inhalation of insects and other foreign matters; If the air outlet of the centrifugal fan is inclined to the upper exhaust air outdoor, it is necessary to add a weather cap to cover the wind and rain; The diameter of the outlet of the centrifugal fan can only be larger than the diameter of the fan, and cannot be smaller than the diameter of the fan. The connecting hose of the inlet must be properly tightened. If it is too loose, it may be inhaled.
What is the angle of the six major and six small blades for a centrifugal fan?
The twisting angle of the fan blades is determined based on the wind pressure and air volume requirements of the fan design, and if the wind pressure requirement is high, the power requirement will also be high, but the air volume will decrease. Of course, the angle of the fan can be 20 °, 25 °, 30 °, and the maximum is 35 °. So generally, you choose the fan directly instead of looking at the fan blades. I hope these will be helpful to you.