explosion-proof contra-rotating axial flow mine fan

The explosion-proof contra-rotating axial flow mine fan merges two axial impellers spinning in opposite directions with a flameproof motor enclosure (Ex d) to ensure both high performance and safety in methane or dust-laden atmospheres.

The first impeller accelerates incoming air, while the second recovers swirl energy, boosting static pressure by up to 20% above single-stage units. Flow rates reach 50,000 CFM with pressures up to 4 kPa.

Constructed with anti-spark copper-aluminum impeller rings and sealed bearings, the fan prevents internal ignition sources. The explosion-proof motor housing meets MSHA, ATEX, and IECEx certifications, ensuring compliance in hazardous mining zones.

Variable frequency drive (VFD) control enables adaptive ventilation, modulating speed based on gas and airflow sensors. Quick-release housing panels and integrated vibration monitoring support predictive maintenance and maximize uptime.