Helios Fans VARD 400/4 Ex

The Helios VARD 400/4 Ex is a high-pressure in-line mixed-flow fan engineered for hazardous environments, certified for explosion protection according to ATEX standards. It features a cylindrical pre-galvanised steel housing with rolled flanges on both ends, designed in accordance with DIN 24155 for standardized and secure mounting. Guide vanes within the casing optimize airflow performance and system efficiency.

The fan is equipped with a mixed-flow impeller consisting of eight spatially curved blades constructed from galvanized steel. It is dynamically balanced to class G 6.3 as per VDI 20060 and DIN ISO 1940, ensuring vibration-free and reliable operation. Power is provided by a totally enclosed, 3‑phase squirrel cage motor, which is maintenance-free and fitted with sealed-for-life low-noise ball bearings. Non-controllable by design, the VARD 400/4 Ex is built for continuous operation in explosion-risk areas requiring high-performance ventilation.