Helios Fans VDD 450/6 Ex

The Helios VDD 450/6 Ex is a centrifugal roof fan designed for vertical discharge in ATEX-classified hazardous environments. It features a seawater-resistant aluminium casing with built-in anti-intrusion protection for enhanced safety in demanding industrial applications.

Its motor support and base plate are made from durable galvanized steel, while the inlet nozzle is constructed from aluminium to resist corrosion. The base plate includes a threaded screw for securely mounting intake-side accessories, aligned with DIN 24155 hole pattern (sheet 3). A protective grille is fitted to the outlet side as standard, meeting DIN EN ISO 13857 safety guidelines.

The fan includes a high-efficiency, backward-curved centrifugal impeller made from aluminium and dynamically balanced in accordance with DIN ISO 1940 – 1 for smooth, vibration-free operation.

It is powered by a totally enclosed, speed-controllable three-phase external rotor motor with IP 44 protection. The motor is fitted with moisture-protected ball bearings, ensuring long-term, maintenance-free, and interference-free performance. Certified explosion-proof, this unit is ideal for reliable ventilation in hazardous or flammable environments.