"F4-72 series centrifugal fan can transport air and other non-spontaneous combustion, harmless, non-corrosive gases for steel. Adhesive materials are allowed, which contain the dust and hard particles should not exceed 150mg / m3 within the air. Air temperature must not exceed 80 ℃. The fan has a good aerodynamic performance, smooth running, small vibration, high efficiency, long life and other characteristics. Widely used in industrial powder spray booth ventilation.