Centrifugal blowers backward curved

Centrifugal Blowers These blowers have air or gases entering in the axial direction and being discharged in the radial direction. These blowers have three types of blades radial or straight blades, forward-curved blades, and backward-curved blades (Figs. 10-84 to 10-86). 

Figure 9.12 Forward curved and backward curved blades on a centrifugal blower.

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