Description
Low Noise Axial Fan
Engineered with heavy-duty thickened steel blades and a high-power all-copper motor. Designed to deliver powerful airflow with whisper-quiet, stable operation. Available in duct, fixed, wall, and positionable configurations to suit diverse ventilation requirements.
Key Technical Features
Built for rigorous industrial safety, low-noise efficiency, and reliable air delivery.
Thickened Steel Blades
Heavy-duty, precision-balanced steel blades deliver superior aerodynamics, powerful airflow, and exceptional running stability.
All-Copper Motor
Thickened copper-core coils provide strong power, high efficiency, and low temperature rise for an extended service life.
Double Mesh Guards
High-strength front and back protective mesh guards minimize hazards and prevent foreign objects from entering.
Thickened Casing
Carbon steel casing finished with a protective paint coating repels oil/dirt, offering outstanding shockproof performance.
Technical Specifications
LWSF Series dimensional parameters and performance data across standard models.
Dimensions (mm) - Selected Models
| Model | D1 (mm) | D2 (mm) | D3 (mm) | L (mm) | Weight (kg) |
|---|---|---|---|---|---|
| LWSF-1.5A | 160 | / | 210 | 190 | 2.0 |
| LWSF-2.5A | 260 | 285 | 310 | 236 | 4.7 |
| LWSF-4A | 415 | 440 | 470 | 330 | 12.5 |
| LWSF-6A | 615 | 645 | 675 | 465 | 48.0 |
| LWSF-8A | 818 | 852 | 885 | 560 | 67.8 |
| LWSF-10A | 1010 | 1050 | 1090 | 670 | 142.0 |
Performance Data
| Model | Speed (r/min) | Matching Motor (kw) | Flow Rate (m³/h) | Total Pressure (Pa) |
|---|---|---|---|---|
| LWSF-1.5A-0.08-2P-1-001 | 2900 | 0.08 | 1000 | 110 |
| LWSF-2.5A-0.25-2P-1-001 | 2900 | 0.25 | 2100 | 143 |
| LWSF-4A-0.37-4P-1-001 | 1450 | 0.37 | 5070 | 149 |
| LWSF-6A-1.5-4P-1-001 | 1450 | 1.5 | 18700 | 300 |
| LWSF-8A-4-4P-1-001 | 1450 | 4.0 | 28000 | 380 |
| LWSF-10A-4~6-6P-1-001 | 960 | 4.0 - 6.0 | 50000 | 260 |
Flexible Installation Options
The LWSF Series is designed to adapt to your specific facility layout. It is available in four distinct installation types, ensuring seamless integration into any industrial setup.
Whether you require inline duct integration, permanent fixed mounting, wall-mounted exhaust, or a positionable fan for localized airflow, this unit accommodates a wide range of ventilation requirements across different applications.
- Duct Type — Flanged design for inline pipe connections
- Fixed & Wall Type — Secure brackets for permanent mounting
- Positionable Type — Sturdy stand for directional, localized airflow
Thickened Steel Fan Blades
The impeller is crafted from heavy-duty, high-strength steel. Each blade undergoes strict dynamic testing to ensure it is precision-balanced before assembly.
This superior aerodynamic profile allows the fan to deliver powerful airflow while maintaining whisper-quiet operation. The combination of lightweight design and high-strength material guarantees exceptional running stability over long operational cycles.
- Heavy-duty steel blades — High strength and durability
- Precision-balanced — Ensures whisper-quiet, stable operation
- Superior aerodynamics — Maximizes powerful airflow generation
High-Power All-Copper Motor
At the heart of the LWSF fan is a high-power industrial motor. Equipped with thickened copper-core coils, the motor provides superior conductivity and energy transfer.
This optimized electrical design delivers strong power and high efficiency, generating substantial airflow while keeping the temperature rise low. The result is a highly reliable drive system that ensures durable performance and a long service life.
- Thickened copper-core coils — Maximizes electrical efficiency
- Low temperature rise — Protects the motor during continuous duty
- Durable performance — Guarantees a long operational service life
Double-Sided Protective Mesh Guards
Safety is paramount in busy industrial environments. The LWSF series comes standard with high-strength protective mesh guards installed on both the front inlet and back outlet.
This robust double-sided protection effectively minimizes potential hazards by preventing hands, tools, or foreign objects from entering the blade chamber, thereby guaranteeing safe and durable service for your workforce.
- Front and back protection — Secures both airflow openings
- High-strength construction — Resists impacts and bending
- Minimizes hazards — Keeps foreign objects out of the impeller
Thickened Carbon Steel Casing
The fan housing is built to endure harsh factory conditions. Constructed from thickened carbon steel, the casing features high hardness and excellent resistance to deformation under load.
The entire surface is finished with a premium protective paint coating that repels industrial oil and dirt, while simultaneously delivering outstanding shockproof and drop-proof performance.
- High hardness steel — Excellent resistance to deformation
- Protective paint coating — Repels industrial oil, dirt, and rust
- Shockproof performance — Endures bumps and drops in active sites
Powerful Airflow Performance
Whether used for exhausting heat or supplying fresh air, the LWSF series excels in volume delivery. The large-diameter axial fan blades are calibrated to generate powerful, concentrated airflow.
This capability allows the fan to quickly improve air circulation in expansive areas, providing highly efficient and rapid ventilation for stifling industrial environments.
- Large-diameter blades — Available up to 1010 mm
- Massive air volume — Delivers up to 50,000 m³/h
- Quick air circulation — Rapidly clears heat, smoke, and odors
Stable & Low Noise Operation
Industrial fans do not have to be disruptively loud. The LWSF series prioritizes acoustic comfort through a meticulously balanced fan design.
By eliminating rotor imbalance, the unit drastically reduces mechanical vibration and aerodynamic noise. This ensures whisper-quiet and smooth operation, making it ideal for maintaining a comfortable auditory environment during extended working hours.
- Balanced fan design — Drastically reduces operational vibration
- Acoustic optimization — Lowers aerodynamic noise generation
- Smooth operation — Ideal for continuous, extended working hours
Wide Industrial Applications
A versatile and quiet solution for safe air delivery and exhaust in diverse industrial areas.
Factory Workshops
Provides powerful exhaust for production lines without disrupting the auditory environment of workers.
Warehouses
Ensures massive cross-ventilation to prevent heat buildup and moisture in expansive storage spaces.
Construction Sites
Rugged design allows for easy positioning to dry paint, clear dust, or supply fresh air to active builds.
Basements & Underground Spaces
Efficiently clears exhaust emissions and stagnant, humid air from enclosed lower-level areas.
Tunnel Ventilation
Utilizes duct installation types to push fresh oxygen deep into long excavation or transit tunnels.
Equipment Cooling
Delivers a high-velocity, localized air stream to rapidly cool down overheating heavy machinery and motors.
Confined Space Ventilation
Ensures a safe breathing atmosphere inside storage tanks, silos, and manholes prior to maintenance entry.
Maintenance Areas
Quickly extracts welding fumes and chemical odors, providing a safe working environment for service teams.
LONGWELL — Trusted Industrial Fan Manufacturer Since 1990
Founded in 1990 in Yuyao, Ningbo, LONGWELL has grown into a vertically integrated ventilation technology group. We engineer standard and explosion-proof fan and motor systems with 4,000 m²+ of manufacturing floor, dedicated aerodynamics labs, and a global export network.
Every LONGWELL fan is built on automated lines, featuring computer-balanced impellers and 100% run-testing before shipment. We are certified to ISO 9001:2015 and ISO 14001, ensuring the highest standards of safety and reliability for hazardous and industrial applications.
Production & Quality Control
Strict quality control, automated assembly, and robust packaging ensure your fans arrive ready for action.
Global Market Presence
LONGWELL exhaust fans are the preferred choice for EPC contractors and industrial clients worldwide.
Trusted by Leading Brands
We supply reliable industrial ventilation solutions to top-tier global manufacturers.
Professional & Certified
Our products meet stringent international safety, quality, and performance standards.
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View Product →Frequently Asked Questions
Quick answers about the LWSF Low Noise Axial Fan.
What installation options are available for the LWSF series?
The LWSF fan offers highly flexible installation. It is available in four configurations: Duct type, Fixed type (with base), Wall type, and Positionable type (with a movable stand) to accommodate diverse ventilation requirements.
How does the fan achieve low-noise operation?
The fan achieves whisper-quiet operation through thickened heavy-duty steel blades that are precision-balanced using strict dynamic testing. This superior aerodynamic design minimizes vibration and reduces mechanical noise during extended running hours.
What material is used for the fan casing?
The casing is constructed from thickened carbon steel, featuring high hardness and excellent resistance to deformation. It is finished with a protective paint coating that repels oil and dirt, providing outstanding shockproof performance.
Is the fan safe from debris and foreign objects?
Yes, the LWSF series comes equipped with double-sided protective mesh guards. This high-strength construction effectively minimizes potential hazards and prevents foreign objects from entering the blade area.
What is the maximum airflow capacity of the LWSF fan?
The LWSF series covers a massive performance range from standard 160mm diameters up to large 1010mm diameters, delivering airflow volumes from 1,000 m³/h up to 50,000 m³/h for the largest models.
Need a Quote or Custom Specifications?
Tell us your airflow, static pressure, and installation requirements — our engineers will size the right LWSF model and provide a quote within 1 business day.
