Helios Fans VARD 355/4 Ex

The Helios VARD 355/4 Ex is a high-pressure in-line mixed-flow fan designed for use in hazardous environments, meeting ATEX certification for explosion-proof applications. The fan features a cylindrical housing made from pre-galvanised sheet steel, with rolled flanges on both ends. Flange dimensions and mounting hole patterns follow DIN 24155 standards, ensuring secure and consistent installation. Integrated guide vanes enhance airflow direction and overall performance.

This model includes a mixed-flow impeller with eight spatially curved blades made from impact-resistant polymer, dynamically balanced to class G 6.3 in compliance with VDI 20060 and DIN ISO 1940 standards. The fan is powered by a totally enclosed, maintenance-free 3‑phase squirrel cage motor with sealed-for-life, low-noise ball bearings. It is not controllable and is specifically engineered to provide safe, dependable ventilation in ATEX-classified environments.