... 2.High efficiency,Easy installation 3.ISO9001 Model C4-73 Dust Removing Centrifugal Fan 1. ApplicationsModel C4-73 Dust Removing ... Centrifugal Fan are mainly used in blower fan and draught fan system of coal fired boiler,steam ... heat recovery boiler,,,,and various boilers. 2.Structure Centrifugal fan mainly consist of impeller,case,air inlet,adjusting door, ...