Helios Fans VDD 400/6 Ex

The Helios VDD 400/6 Ex is a centrifugal roof fan designed for vertical discharge in hazardous areas, fully compliant with ATEX explosion-proof requirements. The casing is made from seawater-resistant aluminium with integrated anti-intrusion protection to ensure operational safety.

The motor support plate and base plate are constructed from galvanized steel, accompanied by an aluminium inlet nozzle for corrosion resistance. The base plate includes a threaded screw for secure attachment of accessories on the intake side, adhering to the DIN 24155 hole pattern (sheet 3). A protective grille is installed on the discharge side as standard, meeting DIN EN ISO 13857 safety standards.

This model features a high-efficiency backward-curved centrifugal impeller manufactured from aluminium and dynamically balanced according to DIN ISO 1940 – 1 to provide smooth, vibration-free operation.

Powered by a totally enclosed, speed-controllable three-phase external rotor motor rated IP 44, the fan uses ball bearings with moisture protection for maintenance-free, interference-free performance. The explosion-proof design makes it suitable for industrial ventilation in ATEX-classified environments.