The Helios HQD 355÷4÷2 is a high-efficiency axial fan designed for industrial ventilation, featuring a square mounting plate with an inlet cone for optimized airflow. The housing is fabricated from galvanized sheet steel and finished with two coats of paint for enhanced protection and longevity.
This model uses a profiled polymer blade impeller that is aerodynamically optimized and dynamically balanced to ensure efficient and smooth operation. The fan is suitable for ambient temperatures ranging from ‑30 °C to +60 °C.
Power is supplied by a totally enclosed 3‑phase squirrel cage motor with Dahlander winding technology that enables two-speed operation via pole switching. The motor is maintenance-free and equipped with low-noise sealed-for-life ball bearings, providing reliable performance in demanding applications.