Helios Fans HQD 315/4 Ex

The Helios HQD 315/4 Ex is a high-efficiency axial fan designed for hazardous environments, constructed to meet ATEX explosion-proof standards. It includes a square mounting plate with a drawn bell mouth inlet, all fabricated from galvanized sheet steel to ensure durability and corrosion resistance.

The fan is equipped with a 7‑blade impeller made from impact-resistant, anti-static polymer materials that provide excellent aerodynamic efficiency. The impeller is dynamically balanced according to DIN ISO 1940 and VDI 2060 class 6.3 to guarantee smooth operation. This model is suitable for ambient temperatures between ‑30°C and +40°C and features electrical resistance under 1 Ohm to meet safety requirements.

Power is supplied by a totally enclosed, maintenance-free 3‑phase squirrel cage motor with sealed-for-life, low-noise ball bearings. The motor is not speed-controllable and is specifically designed for explosion-proof applications, making the HQD 315/4 Ex a reliable choice for safe ventilation in ATEX-regulated industrial settings.