3. Product characteristics Model: 2.8,3.2,3.6,4,4.5,5,6,6.3,7,8,10,12.5,16,20,etc. Transmission way: 2.8~5(A type);6~12.5(C,D,E type);16~20(B type) Flow: 565-239654 m3/h Pressure: 166-3863 Pa Power: 0.55-220 KW Rotating speed: 250-2900 r/min 1. Product Introduction Model 4-72 centrifugal blower is applicable in ventilating and conveying air and other gases that non-flammable, non-explosive, non-volatile, harmless to the human body, non -corrosive to steel in general factory and large buildings indoor. B4-72 centrifugal blower can be used for pumping flammable and volatile gases.F4-72 model is mainly used for conveying corrosive gases.But there must be no any sticky substance in the gases that Model 4-72,B4-72,F4-72 centrifugal blower conveys, and the dust and hard particles contained no more than 150mg/m3. Gas temperature should not exceed 80ºC.