Application field: Export fan in small size and easy installation, which is applied to 60Hz power frequency countries and regions, the gas conveyed by the Model GS Series Centrifugal Blower should be nontoxic, innoxiously, non-corrosive, non-self-igniting, and the temperature should not be higher than 80℃. The powder dust contained in the conveying gas should be no more than 150mg/m3.