Helios Fans VARD 500/6 Ex

The Helios VARD 500/6 Ex is a high-pressure in-line mixed-flow fan specifically built for applications in explosive atmospheres. It is ATEX-certified for safe operation in hazardous zones. The fan features a cylindrical casing made from pre-galvanised sheet steel, complete with rolled flanges at both ends for compatibility with standard ductwork. Flange dimensions and fixing holes adhere to DIN 24155 specifications, ensuring precise and secure installation. Integrated guide vanes improve airflow efficiency and directional stability.

The impeller is of mixed-flow design, incorporating eight spatially curved blades made from galvanized steel. It is dynamically balanced to class G 6.3, meeting the requirements of VDI 20060 and DIN ISO 1940 to ensure quiet and stable performance. The fan is powered by a fully enclosed 3‑phase squirrel cage motor, which is maintenance-free and fitted with low-noise, sealed-for-life ball bearings. This model is not suitable for speed control and is purpose-built to provide safe, reliable ventilation in explosion-prone environments.