... biomass boilers. 2. Structure Main parts:Case,Impeller,Motor, protective screening. fans can be divided into10 specifications ... consist of the following product parts:case, impeller, air inlet, motor, system integral pedestal, main shaft, driving system ( ... Performance Impeller TypeDriving ModeSpindle Speed(r/min)Air Volume(m3/h)Total Pressure(pa)Motor(kw)4Coupling29003242 - 56601882 - 209344.54613 ...