... balancing tested Impellers 2.High efficiency,Easy installation 3.ISO9001 Model C4-73 Dust Removing Centrifugal Fan 1. ApplicationsModel C4 ... of impeller,case,air inlet,adjusting door,transmission,motor,system integral pedestal.3.Blades angleThe export position of the ... pressurevoltage and frequencymedium temperature and desityaltitude of operation place ... Model C4-73 Dust Removing Centrifugal Fan