Tunnel Fans Blower Reversible Flow Axial Fans for Tunnel Ventilation

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Subway Wind Fan | SDS Tunnel Jet Fan for Metro and Underground Projects

Overview

The SDS Subway Wind Fan (Tunnel Jet Fan) is a high-performance ventilation solution designed for underground infrastructures such as subways, highway tunnels, and railway tunnels. Available in specifications from 630 mm to 1600 mm, the SDS series includes both unidirectional jet fans and reversible (two-way) jet fans, delivering a maximum thrust of 3500 N. With options for high-efficiency and low-noise configurations, the SDS Tunnel Jet Fan ensures reliable airflow, safe operation, and compliance with international ventilation standards.

Key Features

Wide Range of Specifications: 630–1600 mm impeller size, maximum thrust up to 3500 N.

Two Operation Modes: one-way and reversible (bi-directional) jet fans for flexible ventilation.

High Reliability: motors with H-class insulation and IP55 protection, ensuring stable performance under demanding conditions.

Emergency-Ready: reversible switching time within 30 seconds, ideal for smoke extraction and fire emergencies.

Durable Design: corrosion-resistant housing, enclosed squirrel-cage motors, and optimized airflow structure for long service life.

Low Noise Options: tested with silencers for compliance with tunnel acoustic requirements.

Applications

The SDS Subway Wind Fan plays a crucial role in tunnel ventilation systems, ensuring air quality, visibility, and safety:

Subway Systems – daily ventilation, smoke extraction, emergency response

Highway Tunnels – removal of CO, NOx, and vehicle exhaust gases

Railway Tunnels – stable air circulation for long-distance underground routes

Emergency Ventilation – rapid smoke control in case of fire

The fan system can be adapted for longitudinal, transverse, or semi-transverse ventilation modes, depending on project requirements.

Technical Specifications

Impeller Size: 630 mm – 1600 mm

Maximum Thrust: 3500 N

Power Range: multiple configurations available

Motor: totally enclosed squirrel cage, H-class insulation, IP55 protection

Reversibility: bi-directional airflow with electronic/mechanical switching within 30 s

Noise Level: optimized with optional silencers, tested under open-field conditions

Testing & Certification

Each SDS Subway Wind Fan undergoes rigorous testing to ensure compliance with national and international standards:

Thrust Test: verified using calibrated thrust testing equipment

High-Temperature Fire Test: certified by Tianjin Fire Experiment and Testing Center

Noise Test: measured at 10 m, 45° angle, under standard atmospheric conditions

Efficiency Test: thrust (N) vs motor input power (kW) efficiency evaluation

Why Choose SDS Subway Wind Fans?

Proven performance in metro and tunnel projects worldwide

Flexible configurations for any ventilation system design

Compliance with safety, fire resistance, and environmental regulations

Backed by engineering expertise and technical support

Our company manufactures high-quality Tunnel Fans Blower Reversible Flow Axial Fans for Tunnel Ventilation with rigorous scientific management system, modern advanced industrial equipment and high-quality professionals. You will be satisfied with our products. We strengthen the construction of the talent team, make full use of the brand and product technology advantages to offer customers with higher-quality products and professional services. 'Choose us is to choose satisfaction', and carry out win-win cooperation with every customer is our eternal goal.