explosion-proof contra-rotating axial fan

Explosion-proof contra-rotating axial fans utilize two impellers rotating in opposite directions on the same shaft, recovering swirl energy and significantly boosting static pressure. Encased in robust Ex d flameproof housings, these units prevent internal sparks from igniting explosive atmospheres, making them ideal for underground mines and chemical processing facilities.

The first impeller imparts velocity and swirl, while the second straightens and pressurizes the flow, achieving pressure rises up to 20% higher than single-stage fans. Designed for continuous operation, the impellers are dynamically balanced to minimize vibration and extend bearing life under heavy loads.

Equipped with premium IE4 motors and integrated variable frequency drives (VFDs), these fans provide adaptive ventilation, automatically adjusting speed based on real-time gas, temperature, and airflow sensors. Soft-start capability reduces mechanical stress, and explosion-proof VFD enclosures maintain safety compliance under ATEX, IECEx, and MSHA standards.

Maintenance is simplified with quick-release housing panels, sealed-for-life bearings, and onboard diagnostic sensors for temperature and vibration. This combination of dual-stage airflow and hazardous-area certification delivers reliable, high-performance ventilation where safety and efficiency are paramount.