The SDS Tunnel Jet Fan is an axial-flow jet ventilation unit designed for tunnel air distribution and longitudinal smoke control.
The SDS(K) supports single-direction ventilation, while the reversible SDS(R) switches airflow direction for emergency smoke extraction or bidirectional traffic systems.
SDS(K) And SDS(R) Ventilation Forms
SDS(K) Unidirectional Tunnel Jet Fan Performance Data
SDS(K) is a unidirectional tunnel jet fan. It is commonly used for longitudinal ventilation systems where the tunnel airflow direction is fixed. Final selection should be confirmed by thrust demand, tunnel length, installation spacing, noise requirement and tunnel ventilation design.
r/min
m³/s
N
kW
dB(A)
SDS(R) Reversible Tunnel Jet Fan Performance Data
SDS(R) is a reversible tunnel jet fan. It is used when bidirectional airflow control or emergency smoke control is required. The reversible design can switch forward and reverse rotation and reach rated speed within 30 seconds.
r/min
m³/s
N
kW
dB(A)
Ventilation Function
Impeller sizes range from 4K/4B to 16K, providing different thrust and airflow configurations for tunnel ventilation requirements.
Adjustable blade pitch settings from a1 to a6 allow factory configuration of fan performance according to the required operating point.
Mechanical Construction
Impeller Materials: Blades are available in cast aluminum alloy or steel, depending on the model and project requirements.
Adjustable Blade Pitch: Blade angles can be set from a1 to a6 during factory assembly to match the specified operating requirements.
Fan Casing: The carbon steel casing uses continuous welding, rolled flange rings and integrated mounting lugs for structural support and installation.
Surface Protection: Hot-dip galvanizing or multilayer epoxy coatings are available for different humidity and corrosion conditions.
Dimensions & Installation
Fan dimensions, mounting arrangements, and required clearances vary by model. Technical drawings are available for project layout and tunnel-clearance verification.
For engineering selection, confirm the fan diameter, overall length, weight, mounting position, and available overhead clearance.
Motor Drive & Electrical Configuration
Motor Speeds: Available options include 2P (2,900 r/min), 4P (1,470 r/min), 6P (980 r/min), and 8P (740 r/min).
Motor Power: Motor power ranges from 0.75 kW to 90 kW across the SDS series, depending on model and required performance.
Power Supply: Motor power supplies can be configured for 380, 400, 415, 440 or 660 V at 50/60 Hz, according to project requirements.
Enclosure Protection: IP55 motor enclosures provide protection against dust ingress and water jets under the specified protection conditions.
Insulation Class: Class F or H insulation is available according to load and thermal requirements. Fire-rated performance requires separate verification.
Starting Me
Tunnel Noise Control
Silencer Type: Cylindrical podded or open-ring silencers are fitted to the fan inlet and outlet.
Sound-Absorbing Material: Non-combustible, moisture-resistant mineral wool is enclosed behind perforated metal panels.
Noise Level: Sound pressure levels range from 63 to 79 dB(A), depending on model and operating condition. Test conditions should be confirmed in the applicable technical datasheet.
Acoustic Customization: Silencer length and acoustic configuration can be adjusted according to project noise limits and installation requirements.
Smoke Extraction
Emergency Configuration: High-temperature versions can be developed according to project temperature, duration, and testing requirements.
Rapid Reversal: SDS(R) fans enable airflow reversal during emergency smoke-control operations.
Information Required for Tunnel Jet Fan Selection
Tunnel cross-sectional area (m²) and total tunnel length (m)
Ventilation type (Unidirectional SDS-K or Reversible SDS-R)
Required total airflow volume (m³/s) or target air velocity (m/s)
Total design thrust demand (N) and available overhead clearance
Power supply parameters (Voltage, Frequency, Phase)
Emergency high-temperature smoke extraction criteria (Temperature and Duration, if applicable)
Special material or coating requirements (e.g., hot-dip galvanized casing, specific motor brand)
FAQ
Q: Can you provide certifications for tender or project approval?
A: Yes. We can provide CE certification, ISO 9001/14001/45001 certificates, and applicable third-party test reports. Please specify the required documents.
Q: What payment terms are available?
A: We accept T/T with a deposit and balance before shipment, as well as L/C at sight for qualifying orders. Terms can be discussed for large, multi-phase projects.
Q: Can you handle export and customs documentation?
A: Yes. We provide commercial invoices, packing lists, certificates of origin, and other required documents, and can coordinate FOB or CIF shipments with your freight forwarder.
Q: Can we place a small pilot order before the full project?
A: Yes. Pilot orders can be arranged for trial installation, although unit pricing is usually higher than bulk rates.
Q: Are project-specific exclusive supply agreements available?
A: Project-specific terms and confidentiality for custom specifications can be discussed under an NDA.
Q: How are shipping-damage claims handled?
A: Transit damage is generally covered by cargo insurance rather than the product warranty. Confirm coverage and arrival inspection procedures before shipment.
Q: Do you provide on-site commissioning support?
A: Remote support is standard. On-site assistance can be arranged for large projects, subject to location, travel requirements, and cost.
Q: Can you guarantee long-term spare-parts availability or pricing?
A: Spare-parts availability can generally be maintained throughout the product line's service life. Fixed pricing for multi-year contracts can be negotiated separately.
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