"F4-72 series centrifugal fan can transport air and other non-spontaneous combustion, harmless, non- ... within the air. Air temperature must not exceed 80 โ. The fan has a good aerodynamic performance, smooth running, small vibration, high ... . F4-72 series of anti-corrosion centrifugal fan, mainly made โโof stainless steel (or fiberglass) Impeller material made of, housing, air inlet ...