Underground mining and deep tunnel construction require uninterrupted, high-pressure airflow to clear hazardous gases, suppress dust, and maintain safety compliance. Hengding Fan engineered the DK Series Counter-Rotating Mining Ventilation Fan to deliver powerful, energy-efficient airflow tailored to complex underground mine environments.
By utilizing a dual-stage counter-rotating impeller system, Hengding Fan eliminates energy losses common in single-rotor axial fans, providing higher static pressure and superior aerodynamic efficiency for long-distance ventilation networks.
Key Features & Technical Advantages
1. Advanced Counter-Rotating Technology
The DK Series features two opposing impellers driven by independent motors. The rear impeller counter-rotates against the airflow generated by the front impeller, serving as an active guide vane. This design recovers rotational eddy energy, boosts overall pressure by up to 1.2 to 1.3 times compared to standard axial fans, and significantly raises total static efficiency.
2. Explosion-Proof & Safety Compliant
Built specifically for underground coal mines and metal mines with high gas (methane) and coal dust concentration:
Integrated with high-performance explosion-proof electric motors.
Constructed with heavy-duty anti-sparking materials and reinforced steel casings.
Complies with international mining safety and flameproof standards.
3. High Air Pressure & Extended Air Transmission
Underground shafts demand high pressure to overcome friction loss over extended ducting lines. Hengding Fan's precision-balanced impellers ensure steady pressure delivery, guaranteeing fresh air supply to distant working faces and rapid extraction of toxic exhaust gases.
4. Energy-Saving & Low Operational Noise
With optimized blade aerodynamics and smooth internal airflow channels, the DK Series reduces turbulence and air noise. The improved efficiency directly lowers power consumption per cubic meter of air delivered, minimizing long-term operating costs for mine operators.
Technical Specifications
| Parameter | Specification Range |
| Brand Name | Hengding Fan |
| Fan Model | DK Series (DK40, DK45, FBD Series available) |
| Fan Type | Counter-Rotating Axial Flow Mine Fan (对旋轴流风机) |
| Drive Type | Direct-Drive Dual Explosion-Proof Motors |
| Impeller Diameter | 800 mm – 2,800 mm+ (Customizable) |
| Air Volume Range | 10 m³/s – 350+ m³/s (Customized per mine capacity) |
| Full Pressure Range | Up to 4,500+ Pa |
| Application Environment | Underground Coal Mines, Tunneling, Metallurgical Shafts |
Primary Applications
Underground Coal Mines: Functions as main or auxiliary surface/underground ventilation fans to dilute gas concentrations and maintain fresh air circulation.
Tunnel & Subway Construction: Provides forced or exhaust ventilation in long-distance civil infrastructure tunneling projects.
Non-Coal & Metal Mines: Delivers durable ventilation through high-impedance, multi-branch underground airway networks.
Why Partner with Hengding Fan?
As an established manufacturer of industrial fans and heavy ventilation systems, Hengding Fan provides end-to-end technical support and reliable manufacturing:
Custom Engineering: Tailored aerodynamic design, impeller angles, and motor power match your exact airflow and pressure specs.
Rigorous Testing: Every unit undergoes strict dynamic balancing, vibration testing, and performance validation before dispatch.
Global Export Logistics: Proven track record supplying heavy-duty mining machinery to international infrastructure and mining sites.
Request a Technical Quote
Looking for a reliable, high-pressure counter-rotating fan for your underground mining or tunneling project? Contact the Hengding Fan technical engineering team today for detailed catalogs, CAD drawings, and factory-direct pricing.
Email: winston-xu@hengdingfan.com
