FB Series Flameproof Auxiliary Forcing Fan

I. Product Overview

The FB Series Flameproof Auxiliary Forcing Fan (blowing fan) is a high-efficiency, safe ventilation solution designed for underground coal mines with explosive gases. Featuring advanced aerodynamic blades and flameproof construction, it delivers stable performance, high efficiency, low noise, and long service life. Suitable for medium and long-distance air supply, it meets local ventilation needs in coal mining, metal mining, chemical, tunnel, metallurgy, and construction industries.

II. Product Features

• Explosion-proof Safety: Full flameproof structure (ExdbⅠMb) with YBF3 flameproof motor, ideal for coal mines with gas hazards.

• High Efficiency & Energy Saving: Advanced axial blades ensure excellent aerodynamics, long air delivery, low energy use, and reliable operation, even at low flow rates.

• Low Noise & Long Life: Special silencing design, low noise, minimal maintenance, service life ≥5 years, and over 13,000 hours before first overhaul.

• Reliable Operation: Simple installation, robust structure, stable and reliable for various underground environments.

• Wide Application: Suitable not only for coal mines, but also for metal mines, chemical mines, tunnels, and other local ventilation needs.

III. Structure

Main components include inlet collector, main unit, motor, impeller, and diffuser. Some models have a single impeller, while others feature a dual-impeller (two-stage) design for higher pressure and airflow. The unit is compact and easy to install and maintain.

1— Inlet Collector     2— Main Unit     3— Motor     4— Impeller     5— Diffuser

Figure 1  FB Series Flameproof Axial Mine Auxiliary Fan

1— Inlet Collector   2— First-Stage Impeller  3— Main Unit   4— Motor  5— Second-Stage Impeller   6— Diffuser

Figure 1   (Dual-Impeller) FB Series Flameproof Axial Mine Auxiliary Fan

IV. Main Applications & Service Conditions

Applications:
Primarily used for press-in local ventilation in underground intake roadways of coal mines. Also suitable for other scenarios requiring efficient, long-distance air delivery.

Service Conditions:

• Altitude ≤ 1000 m

• Operating temperature: –15°C ~ +40°C

• Relative humidity ≤ 90% (at 25°C)

• Conveyed air should be non-corrosive, with no severe vibration

• Used with positive-pressure air duct, firm foundation, and no water drips

V. Technical Standards

• Compliance:
  MT/T 222-2019 “Technical Specification for Coal Mine Local Ventilation Fans”
  Q/BFJ011-2024 “Technical Specification for FB Series Mine Flameproof Forcing-Type Axial Local Ventilation Fans”

• Explosion-proof Type:
  ExdbⅠMb (both fan and matching motor are flameproof)

VI. Model Explanation

Example: FB№5.0/15
F—Fan; B—Flameproof; №5.0—Impeller diameter 5.0 dm; 15—Motor power 15 kW (per unit).

VII. Service Life

Designed service life: ≥5 years
Safe continuous operation (before first overhaul): up to 13,000 hours

Technical Performance Parameters Table of FB Series Flameproof Axial Mine Auxiliary Fan