Helios Fans HQW 355/4 Ex

The Helios HQW 355/4 Ex is a heavy-duty, explosion-proof axial fan designed for ventilation in hazardous environments where explosive gases or dust may be present. With a 355mm galvanized steel cylindrical casing and standardized flange connections, it ensures secure installation in industrial duct systems.

This fan is powered by a 4‑pole, 3‑phase, explosion-protected motor, which is ATEX certified for use in Zone 1 and Zone 2 hazardous areas. The 4‑pole design provides a balance of powerful airflow and reduced noise levels, making it ideal for critical safety applications in sensitive environments.

The aerodynamically optimized polymer impeller is dynamically balanced to DIN ISO 1940 – 1 standards, ensuring minimal vibration, stable airflow, and long-lasting performance. The motor includes sealed-for-life bearings and thermal protection, offering maintenance-free operation and enhanced safety.

Rated IP54, the fan is protected from dust and water spray, ensuring reliability in tough industrial conditions. It also supports speed control via voltage reduction, allowing flexible performance tuning.

Perfect for use in chemical plants, paint facilities, refineries, and other ATEX-governed locations, the Helios HQW 355/4 Ex delivers safe, quiet, and efficient ventilation with certified explosion protection.