The SDS Tunnel Jet Fan is an axial-flow jet fan designed for longitudinal ventilation in road tunnels, highway tunnels, underground roads, transportation tunnels, and other large underground facilities.
By generating high-velocity airflow and jet thrust, the fan transfers momentum to the surrounding tunnel air and drives longitudinal airflow through the tunnel. It can be used for normal ventilation, pollutant removal, airflow control, and smoke management during fire emergencies.
EMS provides SDS Tunnel Jet Fans with customized airflow, jet thrust, motor power, reversible operation, high-temperature configuration, mounting systems, and electrical control solutions according to individual tunnel projects.
SDS Tunnel Jet Fans are suitable for:
Road Tunnel Ventilation
Highway Tunnel Ventilation
Urban Road Tunnel Ventilation
Underground Road Ventilation
Railway and Transit Tunnels
Underground Parking Facilities
Long Underground Passages
Tunnel Pollutant Exhaust
Tunnel Smoke Control
Fire Smoke Management
Longitudinal Tunnel Ventilation
Underground Transportation Facilities
| Parameter | Typical Range |
|---|---|
| Product Type | Tunnel Jet Fan |
| Fan Diameter | 500–1600 mm |
| Airflow | 20,000–150,000 m³/h |
| Jet Velocity | 20–40 m/s |
| Jet Thrust | 300–2,500 N |
| Motor Power | 7.5–160 kW |
| Motor Speed | 1,450–2,980 rpm |
| Operating Temperature | -20°C to +60°C |
| High-Temperature Operation | Optional |
| Airflow Direction | Forward / Reversible |
| Drive Type | Direct Drive |
| Impeller Type | Axial Flow |
| Casing Material | Carbon Steel / Stainless Steel |
| Motor | Industrial / Tunnel Ventilation Motor |
| Installation | Ceiling / Side Mounting |
| Control | DOL / Soft Starter / VFD |
| Duty | Continuous Operation |
The above values are typical engineering reference ranges rather than fixed specifications for every SDS model. Final fan performance should be selected according to the tunnel ventilation calculation, required jet thrust, smoke-control conditions, and applicable project standards.
The SDS Tunnel Jet Fan uses an axial impeller to accelerate air through the fan and generate a high-speed jet.
The resulting jet exchanges momentum with the surrounding tunnel air, creating longitudinal airflow along the tunnel.
Typical ventilation flow:
Fresh Air → SDS Jet Fan → Longitudinal Airflow → Pollutant Exhaust
For emergency smoke-control applications, multiple jet fans can be strategically installed and controlled to manage smoke movement and support the tunnel's fire safety ventilation system.
The aerodynamic design of the axial impeller and internal airflow passage is optimized to generate effective jet thrust for tunnel longitudinal ventilation.
Reversible configurations can be provided for projects requiring bidirectional airflow or specific smoke-control strategies.
Jet fans are normally suspended from the tunnel ceiling or mounted on brackets, minimizing the need for large ventilation ducts.
The direct-drive configuration reduces mechanical transmission components and simplifies inspection and maintenance.
For fire smoke-control applications, the fan can be engineered with appropriate high-temperature materials, motor configuration, insulation, and other components according to the required duty.
EMS can select and customize the fan according to tunnel length, cross-sectional area, ventilation resistance, required airflow, jet thrust, installation conditions, power supply, and smoke-control requirements.
SDS Tunnel Jet Fans can be installed in:
Tunnel ceilings
Tunnel roofs
Tunnel side walls
Ventilation sections
Underground roadways
Smoke-control zones
Underground transportation facilities
Multiple jet fans can be arranged according to the tunnel ventilation design to establish the required longitudinal airflow pattern.
To select the appropriate SDS Tunnel Jet Fan, the following information is recommended:
Tunnel Length
Tunnel Cross-Section
Tunnel Height
Traffic Volume
Required Airflow
Required Jet Thrust
Ventilation Method
Ventilation Resistance
Smoke Extraction Requirement
Fire Temperature Requirement
Fan Installation Height
Power Supply
Voltage and Frequency
Reversible Operation Requirement
Noise Requirement
Required Fan Quantity
EMS can provide fan selection and engineering recommendations based on the actual project conditions.
EMS provides more than standard tunnel jet fans. Our engineering support can include:
Fan Selection
Performance Matching
Airflow and Pressure Calculation
Jet Thrust Selection
Motor Selection
High-Temperature Design
Reversible Fan Configuration
Noise Control
Mounting Bracket Design
Electrical Control Configuration
VFD / Soft Starter Configuration
Technical Documentation
Export Packaging
Installation Guidance
Project-Based Technical Support