External rotor axial fans offer characteristics in line with the most demanding operation requirements.
The range includes a series of models with impeller diameters from 300 to 550 mm with 4 and/or 6 pole motors, single phase, 230V/50-60Hz, or three phase 230/400V50-60Hz both in sucking and blowing versions, air flows range from 1500 to 7700 m³/h approx.
The characteristics of external rotor motors allow minimum axial dimensions while granting optimum performance in terms of air flow, head and noise; the motor position assures optimum ventilation.
Impellers are made of punched and painted steel sheet, blade shapes are trapezoidal for 300 mm diameter and sickle shaped for larger diameters for quieter operation.
Rotating elements are statically and dynamically balanced.
Overall dimensions and position of fixing points are in line with market standards.
Motors are in class B insulation with thermal protectors (single phase models), mounted on sealed, maintenance free, ball bearings suitable for horizontal or vertical operation.

- Enclosures: IP44 protection.
- Ambient operating temperature: from -20 to 40°C
- Constructed according to European Low Voltage Directive 73/23 EEC and relevant IEC standards
- Painted steel wire fan guards.
- All size are individually packed and complete with fan, fan guard and terminal box assembled.