- Axial Flow Duct Type Tubular Fans - Directly Coupled Motor. - Impeller Is Manufactured From Cast Aluminium Blade. - Hub Is Made By Cast Aluminium. - Duct Fan With Double Flanged Cylindrical Tube Case. - Rigid Construction In Sheet Metal. - Air Flowrate : 3.150 - 96.500 m³/h (Min. - Max.) - Smoke exhaust, suction of dusty and wet air in the foundries, cement factories, paper factories and joinery works, building ventilation and for heater and refrigerators.