Description
Explosion-Proof Axial Flow Fan
ATEX-certified explosion-proof axial flow fans built for hazardous industrial environments — safe, reliable, and engineered for 24/7 ventilation in petrochemical plants, mines, paint booths, and explosive atmospheres.
Ex d IIB T4 · IP55 · Spark-resistant aluminum alloy impeller · 8 standard sizes (200–800 mm)
Why Choose the EX-AF Series
Every EX-AF axial flow fan is engineered around four core principles that matter most in hazardous environments: certified safety, efficient airflow, low-noise operation, and industrial-grade durability.
Explosion-Proof Certified
Ex d IIB T4 flameproof enclosure prevents ignition of surrounding gases — safe for Zone 1 & Zone 2 hazardous areas.
High-Volume Airflow
Optimised axial impeller geometry delivers high CFM/Watt efficiency, moving more air with lower power consumption.
Low-Noise Operation
Dynamically balanced rotor and precision bearings keep working noise down, improving operator comfort on long shifts.
Durable Industrial Build
IP55 sealed housing, corrosion-resistant coatings, and heavy-duty motor for 24/7 continuous duty in harsh environments.
Product Specifications
Choose from 8 standard models covering a wide diameter range from 200 mm to 800 mm. Custom voltages, frequencies, and configurations are available on request.
| Model | ΦA Outer dia. | B Duct height | Φ1 Duct ID | Φ2 Guard hole | Mounting hole | Blade dia. | No. of blades | Threaded port | Remarks |
|---|---|---|---|---|---|---|---|---|---|
| LWEX-AF-2A | 249 | 266 | 212 | 232 | 4 × Φ7 | 195 | 4 | 1/2″ | Double flange |
| LWEX-AF-2.5A | 302 | 269 | 264 | 284 | 4 × Φ7 | 238 | 4 | 1/2″ | Double flange |
| LWEX-AF-3A | 355 | 277 | 305 | 329 | 4 × Φ7 | 285 | 4 | 1/2″ | Double flange |
| LWEX-AF-4A | 454 | 276 | 405 | 433 | 4 × Φ7 | 390 | 3 | 1/2″ | Double flange |
| LWEX-AF-5A | 556 | 298 | 506 | 533 | 4 × Φ7 | 490 | 3 | 3/4″ | Double flange |
| LWEX-AF-6A | 655 | 298 | 606 | 633 | 4 × Φ7 | 590 | 3 | 3/4″ | Double flange |
| LWEX-AF-7A | 764 | 402 | 708 | 740 | 4 × Φ7.5 | 685 | 3 | 3/4″ | Double flange |
| LWEX-AF-7.5A | 806 | 402 | 748 | 781 | 4 × Φ7.5 | 740 | 3 | 3/4″ | Double flange |
High-Volume, High-Efficiency Ventilation
The EX-AF series is built around a high-strength aluminum alloy impeller engineered for maximum airflow. The combination of lightweight construction, optimised blade angle, and precision-balanced rotor delivers excellent aerodynamic performance and high-efficiency air delivery — even in long duct runs or high static-pressure applications.
This makes the EX-AF axial fan an ideal choice for general industrial exhaust, fume extraction, and process cooling where every cubic metre of air moved per watt matters.
- Cast aluminum alloy impeller — lightweight, high strength, corrosion resistant
- Optimised blade profile for stable, low-turbulence airflow
- High CFM/Watt efficiency reduces total cost of ownership
- Available with single-phase or three-phase motors
Spark-Resistant Aluminum Alloy Impeller
In flammable-gas and dust-laden atmospheres, any spark can trigger a catastrophic explosion. The EX-AF impeller is machined from non-ferrous aluminum alloy specifically to minimise spark generation on contact — a critical safety advantage over steel impellers in low-energy collision scenarios.
Beyond safety, the optimised axial geometry produces a steady, stable airflow that rapidly expels hot air, harmful vapours, and combustible gases from work areas, dramatically improving indoor air quality for plant personnel and protecting sensitive equipment from heat damage.
- Non-sparking aluminum alloy — suitable for Ex atmospheres
- Rapid removal of hot air, solvent vapours, and combustible dust
- Improves IAQ (indoor air quality) and worker comfort
- Precision balanced to G6.3 grade for vibration-free operation
Low Noise & Stable Operation
Long shifts in noisy industrial environments cause fatigue, hearing damage, and compliance headaches. The EX-AF axial flow fan is engineered to operate quietly without sacrificing airflow performance, even in continuous-duty applications.
The optimised impeller profile, dynamically balanced rotor, and precision bearings work together to suppress vibration and acoustic output — keeping noise levels well within OSHA and EU workplace noise directives.
- Optimised impeller design — reduces operating noise across the curve
- Low vibration — improves working conditions and equipment longevity
- Stable performance — designed for continuous 24/7 operation
- Suitable for noise-sensitive areas such as control rooms and laboratories
Three Installation Options Available
One product family, three mounting configurations. Choose the installation that matches your site layout, duty cycle, and airflow requirements — no custom engineering needed.
Duct Type
Designed for ducted ventilation systems where air must be delivered over long distances or through complex ductwork. The flanged inlet and outlet match standard duct dimensions, allowing straightforward integration into new builds and retrofit projects alike.
Best for: Chemical plant exhaust, building HVAC risers, tunnel ventilation, and cleanroom return air.
Fixed Type
Permanently installed on walls, floors, or steel frames for continuous-duty ventilation. The robust mounting feet absorb vibration, and the sealed enclosure protects the motor from dust and water ingress in demanding environments.
Best for: Workshops, equipment rooms, warehouse circulation, and dedicated exhaust stations.
Portable Type
Mobile workhorse on an adjustable tripod — move the fan to wherever it is needed. Perfect for spot cooling during equipment maintenance, confined-space work, or temporary ventilation in construction and shutdown scenarios.
Best for: Maintenance crews, shipyards, oil & gas turnarounds, and emergency response.
Wide Industrial Applications
Wherever flammable gases, vapours, combustible dust, or hazardous atmospheres exist, the EX-AF explosion-proof axial flow fan provides safe, dependable ventilation.
Ventilation of process vessels, tank farms, refinery modules, and LPG storage facilities.
Dedicated ventilation for hazardous production lines and powder-coating booths.
Underground mine ventilation, crusher stations, and conveyor galleries.
Tunnels, subways, pipe racks, and utility vaults requiring forced-air exhaust.
Storage facilities for flammable liquids, paints, solvents, and chemical raw materials.
Auto body shops, furniture finishing lines, and industrial paint-spray booths.
General exhaust in factories, foundries, and heavy manufacturing plants.
Cooling of inverters, generator rooms, and process skids in hazardous zones.
Frequently Asked Questions
Answers to the most common technical and commercial questions about the EX-AF explosion-proof axial flow fan.
What is an explosion-proof axial flow fan used for?
What certifications does the EX-AF series hold?
What sizes are available in the EX-AF series?
What installation options does the EX-AF fan support?
What makes aluminum alloy ideal for explosion-proof fan impellers?
What is the difference between Ex d IIB T4 and Ex e fans?
Can the EX-AF fan run continuously 24/7?
What is the IP protection rating of the EX-AF fan?
Does LONGWELL offer OEM/ODM services?
What is the typical lead time for EX-AF orders?
Engineered for the Critical — Your Ventilation & Drive Technology Partner
LONGWELL engineers ventilation and drive systems for mission-critical environments worldwide — built for operations that cannot fail. From petrochemical plants and mining tunnels to cleanrooms and data centres, our explosion-proof, axial, centrifugal, and EC fan families form the breathing backbone of modern industry.
With manufacturing facilities across 7 countries (China, Germany, Russia, Turkey, UAE, Spain, USA) and a partner network spanning more than 80 nations, LONGWELL delivers locally supported, globally consistent quality.
Production, Packaging & Global Delivery
Vertically integrated manufacturing from raw impeller casting to motor assembly, rigorous in-line quality control, and export-grade packaging — so your fans arrive ready to install.
Production Line & Quality Control
In-house impeller casting, CNC machining, motor winding, dynamic balancing, and final assembly — every EX-AF fan is traceable to its production batch.
Export Packaging & Container Loading
Reinforced carton + pallet wrapping, FCL or LCL options, and door-to-door logistics — shipped to 80+ countries.
Exhibition Display
LONGWELL at HVAC industry trade shows worldwide — discover new products, meet our engineering team, and discuss your application face-to-face.
Trusted by Leading HVAC & Industrial Brands
From global HVAC OEMs to industrial equipment manufacturers, LONGWELL fans power the products of the world's most recognised brands.
Certifications & Compliance
EX-AF series is backed by international certifications covering explosion protection, electrical safety, EMC, quality management, environmental management, and occupational health & safety.
Global Presence
With owned brands and offices in 7 countries, LONGWELL provides local sales, technical support, and after-sales service wherever your project is located.
Need Explosion-Proof Ventilation for Your Project?
Tell us your airflow, static pressure, voltage, hazardous zone, and installation type. Our application engineers will reply within 24 hours with a tailored quotation and technical recommendation.
Related Products
Explore other LONGWELL ventilation solutions for hazardous and industrial environments.
- EX-FC Series Explosion-Proof Centrifugal Fan — for high static-pressure ducted systems
- EX Mixed-Flow Fan Series — for tunnel and underground mining ventilation
- Industrial Axial Fans (Non-EX) — for general factory ventilation
- EC Axial Fans — energy-efficient, low-noise commercial ventilation
- Bifurcated Fan — motor-out-of-airflow design for high-temperature exhaust
