... forced ventilation 3.ISO&CE industrial furnace boiler suction fans Company profile:XinXiang blower factory CO., LTD.We have ... 2. Structure Main parts:Case,Impeller,Motor, protective screening. fans can be divided into10 specifications according to the impeller angle ... type of fans are generally consist of the following product parts:case, impeller, air inlet, motor, system integral pedestal, main shaft ...