The Helios HQD 500/4 is a high-performance axial fan designed for industrial ventilation systems that demand reliable airflow and energy efficiency. This directly driven unit features a square mounting plate with a precision-formed bell mouth inlet and integrated duct, all manufactured from galvanized steel and coated with two layers of protective paint for enhanced durability.
Its aerodynamically profiled polymer impeller is engineered for optimal airflow and dynamic balance, delivering smooth and quiet operation. The fan performs effectively across a wide temperature range from ‑30°C to +60°C.
Powered by a totally enclosed 3‑phase squirrel cage motor, the HQD 500/4 includes built-in thermal protection and sealed-for-life ball bearings, ensuring maintenance-free and long-lasting service. Speed control via voltage reduction offers flexibility in ventilation performance, making this fan an ideal choice for a variety of industrial applications.