The Helios HQD 400÷4÷4 is a high-efficiency axial fan designed with a square mounting plate and a drawn bell mouth inlet, including a duct made from galvanized sheet steel finished with two protective paint layers.
This fan is equipped with a profiled blade impeller made of polymers, which is aerodynamically optimized for its intended application and dynamically balanced for smooth operation. It is suitable for use in environments ranging from ‑30 °C to +60 °C.
The fan is powered by a totally enclosed, maintenance-free 3‑phase squirrel cage motor featuring two speeds, controlled through star/delta switching. The motor incorporates low-noise sealed-for-life ball bearings, ensuring quiet and reliable performance.