Helios Fans HRFD 400÷4÷2

The Helios HRFD 400÷4÷2 is a robust and efficient axial fan designed for direct drive applications with flanged cylindrical ducts on both ends. Constructed from galvanised sheet steel, the duct housing encloses a highly efficient, aerodynamically optimized impeller made from durable polymer materials.

This impeller features profiled blades and is dynamically balanced to ensure quiet, smooth operation. The fan is suitable for a wide temperature range from ‑30 °C up to +60 °C, making it adaptable to various industrial environments.

Powered by a totally enclosed 3‑phase squirrel cage motor with Dahlander pole switching, this model offers two-speed operation for enhanced flexibility. The motor includes sealed-for-life, low-noise ball bearings, providing maintenance-free performance and reliable, long-term service. The HRFD 400÷4÷2 is ideal for ventilation systems requiring variable airflow with dependable industrial-grade quality.