"DC Fan" waterproof rating to IP68, can be submerged under water salinity \ oil \ corrosive environment work year round, fans of various sizes can be customized waterproof function, we believe that with your support, we the quality will be better, the price will be more favorable, higher confidence between the parties. When the work product was centrifuged, pushing air with the blade axis perpendicular to the direction (i.e, radial) flow along an axial direction of the intake air, while the outlet was perpendicular to the axial direction. In most cases, use the fan cooling effect can be achieved, however, and sometimes if you need to rotate 90 degrees exhaust airflow or need a larger pressure, you must use a centrifugal fan. Fans strictly speaking, are also a centrifugal fan. Features: limited flow rate, high wind pressure.