Helios Fans VDD 200/4 Ex

The Helios VDD 200/4 Ex is a centrifugal roof fan designed for vertical air discharge in hazardous environments, offering full ATEX certification for explosion protection. The unit features an aerodynamically optimized casing made from seawater-resistant aluminium, designed for both durability and efficiency. Integrated anti-intrusion protection ensures added safety during operation.

The base plate and motor support are constructed from galvanized steel, while the inlet nozzle is also made of aluminium for corrosion resistance. The base plate includes a threaded screw for accessory attachment on the intake side and follows the hole pattern as specified in DIN 24155, sheet 3. A protective grille is standard on the discharge side, conforming to DIN EN ISO 13857 for user safety.

At the core of the unit is a backward-curved centrifugal impeller manufactured from aluminium and dynamically balanced to DIN ISO 1940 – 1 standards, ensuring stable and vibration-free performance.

The fan is powered by a totally enclosed, three-phase external rotor motor rated IP 44. The motor is speed-controllable, equipped with moisture protection, and mounted on ball bearings for smooth, long-lasting operation. It is maintenance-free, interference-resistant, and explosion-proof in compliance with ATEX regulations — ideal for industrial applications in hazardous zones.