Description
Explosion-Proof Portable Axial Flow Fan
Engineered with precision-cast aluminum alloy blades and a high-power all-copper motor. Designed to connect with flexible ducting to achieve long-distance air supply and exhaust in hazardous, confined spaces.
Key Technical Features
Built for rigorous industrial safety, durability, and reliable air delivery.
Aluminum Blades
Precision-cast aluminum alloy blades, dynamically balanced for powerful airflow and stable operation.
All-Copper Motor
High-efficiency copper coils deliver strong power with a low temperature rise for durable performance.
Explosion-Proof
Integrated explosion-proof switch and motor explicitly designed to reduce risks in flammable environments.
Thickened Casing
Carbon steel casing with accurate shaping and smooth welding, providing excellent shock and drop resistance.
Technical Specifications
LWSFP-EX Series dimensions and performance data across standard models.
Dimensions (mm)
| Model | A - Air Inlet (mm) | B - Duct Length (mm) | H - Overall Height (mm) | F - Air Outlet (mm) | Inner Diameter (mm) |
|---|---|---|---|---|---|
| LWSFPEX-2A-0.15-2P-1-001 | 269 | 345 | 306 | 239 | 210 |
| LWSFPEX-2.5A-0.25-2P-1-001 | 329 | 336 | 373 | 292 | 261 |
| LWSFPEX-3A-0.37-2P-1-001 | 365 | 340 | 405 | 333 | 306 |
| LWSFPEX-3.5A-0.55-2P-1-001 | 436 | 368 | 471 | 394 | 364 |
| LWSFPEX-4A-0.9-2P-1-001 | 470 | 370 | 511 | 434 | 406 |
| LWSFPEX-5A-0.75-4P-1-001 | 575 | 468 | 628 | 539 | 507 |
Performance Data
| Model | Blade Dia (mm) | Air Volume (m³/h) | Static Pressure (Pa) | Speed (r/min) | Freq (Hz) | Power (KW) |
|---|---|---|---|---|---|---|
| LWSFPEX-2A-0.15-2P-1-001 | 190 | 1500-2100 | 250-420 | 2800 | 50/60 | 0.15 |
| LWSFPEX-2.5A-0.25-2P-1-001 | 240 | 2700-3300 | 300-450 | 2800 | 50/60 | 0.25 |
| LWSFPEX-3A-0.37-2P-1-001 | 290 | 3300-3720 | 350-500 | 2800 | 50/60 | 0.37 |
| LWSFPEX-3.5A-0.55-2P-1-001 | 340 | 4840-5840 | 550-600 | 2800 | 50/60 | 0.55 |
| LWSFPEX-4A-0.9-2P-1-001 | 390 | 5860-6840 | 750-800 | 2800 | 50/60 | 0.90 |
| LWSFPEX-5A-0.75-4P-1-001 | 490 | 6800-10000 | 185-200 | 1450 | 50/60 | 0.75 |
Powerful Airflow Performance
The LWSFP-EX is built around a robust aerodynamic design. Large-diameter axial fan blades generate powerful airflow, ensuring rapid extraction of stale air or supply of fresh oxygen in industrial environments.
To support this high-performance output, the fan is equipped with rubber vibration-damping pads on its sturdy feet, allowing it to maintain a firm, stable position on uneven floors while reducing operational noise.
- High air volume capacity — quickly improves air circulation
- Flexible duct compatible — pushes air deep into confined spaces
- Vibration-damping pads — secures the unit during maximum airflow
High-Power All-Copper Motor
At the core of the LWSFP-EX lies an industrial-grade, all-copper motor. Equipped with thickened copper-core coils, it guarantees superior conductivity and reliable performance even during continuous shifts.
This motor is engineered to deliver strong power and high efficiency with a low temperature rise. By preventing overheating, it ensures long-lasting operation and extends the overall service life of the fan.
- Thickened copper-core coils — highly efficient power transmission
- Low temperature rise — safe continuous operation
- Durable performance — long service life in harsh conditions
Precision-Cast Aluminum Fan Blades
The impeller utilizes 7 precision-cast aluminum alloy blades. Each blade assembly is dynamically balanced before leaving the factory to ensure optimal aerodynamic performance.
This thickened blade design not only delivers powerful and concentrated airflow with low-noise operation but also ensures enhanced durability, resisting deformation under high pressure.
- 7-blade aluminum alloy design — lightweight yet highly durable
- Dynamically balanced — reduces mechanical vibration
- Low-noise operation — creates a safer auditory environment
Explosion-Proof Safety Protection
Safety is non-negotiable in hazardous locations. The LWSFP-EX series is explicitly designed for environments where flammable and explosive gases or combustible dust may be present.
Both the internal motor and the exterior operation switch are housed in certified explosion-proof enclosures. This isolates internal sparks from the external atmosphere, effectively reducing safety risks during operation.
- Explosion-proof motor enclosure — isolates ignition sources
- Integrated Ex-rated switch — safe manual operation on site
- Designed for hazardous zones — compliant with industrial safety standards
Thickened Carbon Steel Casing
Portable equipment must withstand the rigors of frequent movement and rough handling. The casing is constructed from thickened carbon steel, precisely cut and formed for maximum structural integrity.
Featuring accurate shaping and smooth, even welding seams, this rugged cylindrical shell offers excellent shock resistance and drop protection, safeguarding the precision blades and motor inside.
- Heavy-duty carbon steel — prevents dents and warping
- Smooth welding seams — ensures structural strength and safety
- Excellent drop protection — built tough for demanding job sites
Wide Industrial Applications
A versatile, portable solution for safe air delivery and exhaust in hazardous or hard-to-reach industrial areas.
Construction Sites
Rugged and easy to move, ideal for drying paint, ventilating dust, or supplying fresh air to basement build-outs.
Underground Tunnels
Utilizes flexible ducting to push fresh oxygen deep into excavation sites and clear out equipment exhaust.
Confined Space Ventilation
Ensures a safe breathing atmosphere inside storage tanks, silos, and manholes prior to maintenance entry.
Mining Facilities
Explosion-proof certified to operate safely in environments where combustible coal dust and methane may be present.
Shipyards
Provides critical ventilation for welders and painters working inside deep ship hulls and confined marine compartments.
Warehouse
Powerful cross-ventilation to prevent heat buildup and moisture accumulation in expansive storage facilities.
Workshops
A portable solution to clear welding fumes, chemical odors, or localized heat pockets directly on the production floor.
Equipment Cooling
Delivers a high-velocity, concentrated air stream to rapidly cool down overheating heavy machinery and motors.
Fire Rescue Ventilation
Rapidly clears dense smoke and hazardous gases from structures, improving visibility and safety during emergency responses.
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, including our EX-rated explosion-proof series, 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 LWSFP-EX portable axial fan.
What makes the LWSFP-EX fan safe for hazardous environments?
The fan is specifically designed for environments with flammable and explosive gases and dust. It features an explicitly rated explosion-proof motor and an integrated explosion-proof switch, effectively reducing ignition risks during operation.
Can this fan be used with flexible ducting?
Yes. The LWSFP-EX is designed with a flanged duct structure, making it easy to attach flexible ducting. This allows you to achieve long-distance air supply and exhaust for confined spaces like underground tunnels or shipyards.
What material is used for the fan blades?
It uses 7 precision-cast aluminum alloy blades. This thickened blade design is dynamically balanced to deliver powerful airflow with low-noise operation while ensuring enhanced durability.
Is the casing durable enough for rough job sites?
Absolutely. The casing is made of thickened carbon steel that is precisely cut and formed with smooth welding seams. It offers excellent shock resistance and drop protection, making it ideal for construction and mining sites.
What sizes and airflow capacities are available?
The LWSFP-EX series comes in 6 standard frame sizes with blade diameters from 190 mm to 490 mm. Airflow capacities range from 1,500 m³/h up to 10,000 m³/h.
Need a Quote or Custom Specifications?
Tell us your airflow, static pressure, and facility requirements — our engineers will size the right LWSFP-EX model and provide a quote within 1 business day.
