Axial fan, External rotor motor, outside rotor air blower AXIAL FAN with external rotor motors:1) Frequency: 50 / 60Hz2) ... blade diameters: 250mm,300mm, 350mm, 400mm, 450mm, 500mm, 560mm, 630mm3) 2, 4 or 6 poles4) Single-phase or three-phase5) Suction ... are extensively applied to all kinds of refrigeration equipments, air conditioner, cooling and ventilation instrumentS, outside rotor air blower T200