B – Backward Inclined Centrifugal Fan

SWSI Flow:
600 – 400,000 CFM
DWDI Flow:
1,200 – 750,000 CFM

Pressure:
0 – 30 in. wg.

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Standard Design Features

The backward inclined provides maximum efficiencies with relatively low tip speeds, quiet operation and non-overloading characteristics that result in the smallest wheel diameter for a given volume. The wheel is easily made of special alloys making it good for corrosive environments. The fan provides higher pressures than a forward curve with efficiencies that are only slightly less than an airfoil. The backward inclined is used in the same heating, ventilating and air-conditioning applications as the airfoil. The wheel is used in some industrial applications where the airfoil blade is not acceptable because of corrosive and/or erosion environment.