FBCD Series Explosion-Proof Counter-Rotating Axial Auxiliary Fan

I. Product Overview

The FBCD series explosion-proof contra-rotating exhaust axial local ventilation fan, developed by Shandong Bofeng Fan Co., Ltd., is a new-generation, high-efficiency unit based on advanced domestic contra-rotating fan technology. It is mainly used for exhaust ventilation in underground coal mine roadways and is especially suited for methane-hazardous return airways, featuring rational structure, high efficiency, and low noise.

II. Features

• Explosion-proof & Safe: Full flameproof structure with ExdI certified motors and copper impellers to prevent static and sparks, ensuring underground safety.

• Efficient Contra-rotating Design: Dual impellers driven by two motors, providing higher airflow and pressure, long-distance ventilation, and low energy consumption.

• Low Noise & Long Life: Silenced inner duct for quiet operation; service life ≥5 years, up to 13,000 hours before first overhaul.

• Optimized Structure: Welded steel shell and components for high strength; motors sealed inside the air duct and isolated from mine air for reliability.

• Easy Maintenance: Modular design for convenient installation, inspection, and servicing.

III. Applications & Service Conditions

• Used in methane-hazardous coal mine return airways for exhaust ventilation with negative pressure ducting.

• Medium: Non-corrosive air; Temperature: –20°C to +40°C; Altitude <1000m; Humidity ≤95% (25°C);

• Voltage: 380/660V or 660/1140V, 50Hz, voltage fluctuation within ±5%.

• Fan inlet edge ≥0.3m from ground or roof, ducts must withstand peak pressure.

IV. Standards & Certifications

This product complies with major Chinese and international standards for mine ventilation equipment:

• MT222-2007 (China Coal Mine Local Ventilation Fan Standard)
  A mandatory national industry standard for local ventilation fans in Chinese coal mines.

• Q/BFJ004-2007 (Enterprise Standard, China)
  Technical specification specifically for the FBCD series explosion-proof contra-rotating exhaust axial local ventilation fans, established by Shandong Bofeng Fan Co., Ltd.

• ISO 9001:2015 (Quality Management System Certification)

• ISO 14001:2015 (Environmental Management System Certification)

• ISO 45001:2018 (Occupational Health and Safety Management System Certification)

Our manufacturing and management systems are certified to ISO 9001, ISO 14001, and ISO 45001, ensuring product quality, environmental protection, and occupational safety.

V. Model Example

FBCD No 6.3／2×22
F: Fan; B: Explosion-proof; C: Exhaust; D: Contra-rotating; No6.3: 6.3 dm impeller; 2: Two motors; 22: Each motor 22kW.

VI. Structure & Principle

Main components: inlet collector, main unit, motors, separation chamber, diffuser duct, etc. Dual impellers are independently driven and contra-rotating; motors are sealed and isolated from exhaust air. Copper impellers prevent static and sparks. Welded steel casing ensures durability. Inner duct is silenced for low noise. The fan delivers safe, reliable, and efficient exhaust ventilation for underground coal mines.

1-Inlet Collector  2-First-Stage Assembly  3-First-Stage Motor  4-First-Stage Impeller 5-Second-Stage Impeller

6-Second-Stage Assembly   7-Second-Stage Motor   8-Separation Chamber    9-Diffuser Duct Connector 

Figure 1  FBCD Series Mine Explosion-Proof Contra-Rotating Exhaust Axial Auxiliary Fan

VII. Product Specifications

The FBCD series is a modular product line with multiple models and specifications, meeting a wide range of airflow, pressure, and roadway size requirements (see Technical Performance and Installation Dimensions Table for details).

Technical Performance and Overall/Installation Dimensions Table of Ventilation Fan