Axial fan, External rotor motor, outside rotor air blower AXIAL FAN with external rotor motors:1) Frequency: 50 / 60Hz2) Fan blade diameters: 250mm,300mm, 350mm, 400mm, 450mm, 500mm, 560mm, 630mm3) 2, 4 or 6 poles4) Single-phase or three-phase5) Suction or blowing type 6) Speed: 1,360 / 1,380 / 1,400rpm7) Used as cooling fan for refrigerating equipment and house electrical ventilation appliance8) ...