The Helios HSD 315÷8÷4 is a high-efficiency axial fan designed with a sturdy cylindrical duct casing made from galvanised sheet steel, reinforced with two swaged stiffening rings for enhanced structural integrity. The grille is constructed from impact-resistant polymers, ensuring durability in demanding environments.
This fan features a highly efficient 7‑blade impeller made from impact-resistant polymers and dynamically balanced to Class G 6.3 according to VDI 2060 standards, providing smooth, low-vibration operation. It is suitable for ambient temperatures ranging from ‑30°C to +60°C.
Powered by a totally enclosed, 3‑phase squirrel cage motor with 2‑speed capability via pole switching using Dahlander windings, the motor requires no maintenance and includes low-noise sealed-for-life ball bearings, ensuring quiet and reliable performance.