Helios Fans VDD 630/6 Ex

The Helios VDD 630/6 Ex is a centrifugal roof fan designed for vertical discharge, incorporating an efficiency-optimized aluminium casing engineered for explosion-proof applications in compliance with ATEX standards. The casing is constructed from seawater-resistant aluminium and includes integrated anti-intrusion protection. The motor support plate and base plate are made from galvanised steel, with an aluminium inlet nozzle. The base plate is equipped with threaded screws for secure attachment of intake-side accessories, following the DIN 24155 hole pattern (sheet 3). A protective grille is standard on the discharge side, adhering to DIN EN ISO 13857 for safety.

This fan is fitted with a high-efficiency backward curved centrifugal impeller crafted from aluminium, dynamically balanced according to DIN ISO 1940 – 1 to ensure smooth operation.

Power is provided by a totally enclosed, speed-controllable three-phase external rotor motor with IP44 protection. The motor includes moisture-protected ball bearings and is maintenance-free and interference-free, making it suitable for hazardous environments requiring explosion-proof certification.