... specifications for choosing GRAD Centrifugal Fan Low-noise cabinet centrifugal fan Using range : ... centrifugal fan and axial fan. Structural characteristics: 1, The fan box series select chassis forward low-noise multi-blade centrifugal ... impeller, high-quality bearings, shaft, tank panels havecolorful panel , galvanized plate, cold spray, and board structure into muffler. 2,The fan ...