HIGH TEMPERATURE BACKWARD INCLINED FANS

Medium flow volumes against low to medium static pressures

Backward Inclined or “BI” fans are usually specified for medium flow volumes against low to medium static pressures. The wheel’s blades are flat and lean away from the direction of the wheel’s rotation. To move a given amount of air the backward inclined fan is of a non-overloading design and is suitable for systems with fluctuating system resistance. This type of fan runs at a relatively high speed and is more mechanically efficient than the forward curved multiblade or radial blade fan.

The higher operating speed comes with maximum temperature tradeoffs: IGE only recommends backward inclined wheels for operation up to 1350°F (730°C). For higher temperature operation or operation with significant thermal shock (e.g., batch operation), please see forward curved multiblade fans or radial blade fans. 

IGE offers backward inclined fan units from 850 CFM to 45,280 CFM with pressures up to 8” w.c. with standard construction. Higher pressures are available with specialty construction. IGE’s backward incline fan units are available in three temperature ratings.