Description
Explosion-Proof Exhaust Fan
ATEX-certified explosion-proof exhaust fans built for hazardous industrial environments — safe, reliable wall-mounted ventilation for chemical plants, oil & gas facilities, paint spray booths, battery factories, and other explosive atmospheres.
Ex d IIB T4 · IP55 · One-piece die-cast carbon steel casing · Spark-resistant aluminum alloy impeller · 4 standard sizes (300–600 mm)
Why Choose the EX-WF Series
Every EX-WF explosion-proof exhaust fan is engineered around four core principles that matter most in hazardous industrial ventilation: certified safety, rugged construction, high airflow, and quiet operation.
Explosion-Proof Certified
Ex d IIB T4 flameproof enclosure prevents ignition of surrounding gases — safe for Zone 1 & Zone 2 hazardous areas.
Heavy-Duty Carbon Steel Casing
One-piece die-cast housing — shockproof, deformation-resistant, and built for industrial impact environments.
High-Efficiency Air Delivery
Optimized aluminum alloy impeller delivers up to 9,500 m³/h airflow with rapid air exchange and low power draw.
Low-Noise & Stable
Precision-balanced rotor and quality bearings keep vibration and noise low for 24/7 continuous-duty operation.
Product Specifications
Choose from 4 standard models covering duct inner diameters from 300 mm to 600 mm. Air volume ranges from 2,200 m³/h to 9,500 m³/h. Custom voltages and frequencies available.
Dimensional Specifications
| Model | A. Overall height of fan | B. Height of fan casing | C. Front panel frame | D. Mounting hole spacing | Mounting holes | Duct inner diameter | Flange edge | Fan blade diameter | Number of fan blades | Threaded port |
|---|---|---|---|---|---|---|---|---|---|---|
| LWEX-WF-3A | 265 | 175 | 372 | 340 | 4 × Φ12 | 307 | 320 | 285 | 4 | 1/2″ |
| LWEX-WF-4A | 265 | 175 | 472 | 440 | 4 × Φ12 | 407 | 420 | 390 | 3 | 1/2″ |
| LWEX-WF-5A | 275 | 180 | 572 | 540 | 4 × Φ12 | 507 | 520 | 490 | 3 | 3/4″ |
| LWEX-WF-6A | 275 | 180 | 672 | 640 | 4 × Φ12 | 607 | 620 | 590 | 3 | 3/4″ |
Electrical & Performance Specifications
| Model | Power (kW) | Air Volume (m³/h) | Speed (r/min) | Voltage (V) |
|---|---|---|---|---|
| LWEX-WF-3A-0.12-4P-1-001 | 0.12 | 2200 | 1450 | 220 |
| LWEX-WF-3A-0.12-4P-3-001 | 0.12 | 2200 | 1450 | 380 |
| LWEX-WF-4A-0.18-4P-1-001 | 0.18 | 2400 | 1450 | 220 |
| LWEX-WF-4A-0.18-4P-3-001 | 0.18 | 2400 | 1450 | 380 |
| LWEX-WF-5A-0.25-4P-1-001 | 0.25 | 4900 | 1450 | 220 |
| LWEX-WF-5A-0.25-4P-3-001 | 0.25 | 4900 | 1450 | 380 |
| LWEX-WF-6A-0.37-4P-1-001 | 0.37 | 9500 | 1450 | 220 |
| LWEX-WF-6A-0.37-4P-3-001 | 0.37 | 9500 | 1450 | 380 |
Thickened Carbon Steel Casing — Shockproof & Drop-Resistant
The EX-WF housing is built from a single-piece die-cast carbon steel body, giving the fan exceptional mechanical strength in harsh plant environments. The high-hardness shell is deformation-resistant under impact and forms a robust flameproof enclosure that contains any internal ignition event without rupturing.
This rugged construction makes the EX-WF the exhaust fan of choice for environments where mechanical knocks, vibration, or falling tools are routine — including fabrication shops, chemical warehouses, and maintenance areas.
- One-piece die-cast carbon steel — no welded seams, no weak points
- Shockproof and drop-resistant for industrial impact environments
- High hardness surface — deformation-resistant under sustained load
- Forms a robust Ex d flameproof enclosure for hazardous location ventilation
Explosion-Proof Safety Protection
The EX-WF series is specifically engineered for environments containing flammable gases, vapours, or combustible dust. Its flameproof enclosure and intrinsically safe design prevent any internal electrical or thermal event from igniting the surrounding hazardous atmosphere — protecting workers, equipment, and the entire facility.
By removing contaminated air before it reaches lower explosive limits (LEL), the EX-WF keeps hazardous zones within safe operating conditions — a critical safety layer in any ATEX-classified facility.
- Ex d IIB T4 rated — flameproof enclosure, gas group IIB, surface temp ≤ 135 °C
- Certified for Zone 1 & Zone 2 hazardous areas
- Effective at reducing safety risks during operation in explosive atmospheres
- CE / ATEX / IECEx / ISO 45001 compliant
Spark-Resistant Aluminum Alloy Impeller
At the heart of the EX-WF is a high-strength aluminum alloy impeller machined to deliver excellent aerodynamic performance and high-efficiency air delivery. The non-ferrous construction minimises spark generation on contact — a critical safety property in flammable-gas and dust-laden atmospheres.
Beyond safety, the optimised blade profile reduces turbulence and pressure losses, allowing the EX-WF to deliver more cubic metres of air per watt than typical industrial exhaust fans in this size class.
- High-strength aluminum alloy — lightweight and corrosion-resistant
- Optimised blade profile for stable, high-efficiency airflow
- Non-sparking — suitable for hazardous explosive atmospheres
- Dynamically balanced for low vibration and long bearing life
High-Efficiency Ventilation & Air Exchange
The EX-WF adopts an optimised impeller structure that delivers stable airflow output and achieves rapid air exchange and cooling in confined industrial spaces. From a small paint booth to a chemical plant production hall, the EX-WF clears contaminated air fast enough to keep working conditions safe and productive.
The fan is rated for continuous-duty industrial operation, with air volumes from 2,200 m³/h (LWEX-WF-3A) up to 9,500 m³/h (LWEX-WF-6A) — giving you the right airflow capacity for every room size.
- Rapid air exchange — clears fumes, vapours, and dust in minutes
- Stable airflow output across the entire operating curve
- Four models cover 2,200 – 9,500 m³/h — match fan to room size
- Lower power draw per m³/h moved — reduced total cost of ownership
Reliable Motor Performance
The EX-WF is driven by an industrial-grade motor configuration engineered for stable starting and reliable continuous operation. Quality copper windings, precision-balanced rotor, and oversized bearings ensure the motor delivers rated performance under the most demanding duty cycles.
Available in both single-phase (220 V) and three-phase (380 V) variants across all four models, the EX-WF integrates seamlessly into existing plant electrical systems worldwide.
- Industrial-grade motor — stable starting, reliable continuous duty
- Single-phase 220 V and three-phase 380 V variants available
- Standard 1450 r/min operation across all four sizes
- Power ratings from 0.12 kW to 0.37 kW — right-sized for each airflow class
Low Noise & Stable Operation
Long shifts in noisy industrial environments cause operator fatigue and hearing damage. The EX-WF's optimised impeller design reduces operating noise to a level comfortable for sustained working conditions, while low vibration protects both the fan and adjacent equipment.
The result: stable, reliable airflow output suitable for continuous 24/7 operation in noise-sensitive areas such as control rooms, laboratories, and occupied production halls.
- Optimised impeller geometry — quieter operation across the curve
- Low vibration improves working conditions and equipment longevity
- Stable performance for continuous 24/7 industrial duty
- Suitable for noise-sensitive areas near occupied workstations
Three Installation Options Available
One product family, three mounting configurations. Choose the louver and frame style that matches your wall opening, ductwork, or building façade.
Round Louver Type
Round louver frame for inline exhaust where a circular duct or pipe stub is already in place. The radial louver design provides weather protection when the fan is idle, preventing rain ingress and backdraft.
Best for: Inline ducted exhaust, circular wall openings, and tank venting applications.
Square Louver Type
Square louver frame ideal for window openings and standard rectangular wall cut-outs. The square grille provides a clean architectural finish while maintaining full exhaust airflow.
Best for: Window-mounted exhaust, square wall openings, and renovation projects with existing square penetrations.
Wall-Mounted Type
Direct wall-mounted installation using the standard front panel flange. Bolts through four mounting holes provide a permanent, vibration-free attachment to concrete, masonry, or steel-framed walls.
Best for: Plant façades, equipment rooms, and new construction where direct wall mounting is preferred.
Wide Industrial Applications
Wherever flammable gases, vapours, combustible dust, or hazardous atmospheres exist, the EX-WF explosion-proof exhaust fan provides safe, dependable ventilation.
Ventilation of process vessels, tank farms, and chemical production lines.
Refinery modules, upstream wellheads, and gas processing stations.
Auto body shops, furniture finishing lines, and spray booths.
Lithium-ion cell production, electrolyte mixing, and formation rooms.
Storage of flammable liquids, paints, solvents, and chemical raw materials.
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-WF explosion-proof exhaust fan.
What is an explosion-proof exhaust fan used for?
What certifications does the EX-WF series hold?
What sizes and airflow capacities are available in the EX-WF series?
What installation options does the EX-WF fan support?
Why is a one-piece die-cast carbon steel casing important for explosion-proof fans?
What makes aluminum alloy ideal for explosion-proof fan impellers?
Can the EX-WF fan run continuously 24/7?
What is the IP protection rating of the EX-WF fan?
Does LONGWELL offer OEM/ODM services?
What is the typical lead time for EX-WF 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
Impeller casting, CNC machining, motor winding, dynamic balancing, and final fan assembly — every EX-WF 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 — including Stadler, KCX, YORK, L.C.I., Robot, Energia, AUX, Ingersoll Rand, Systemair, Carrier, FRICO, Verano, Kampmann, TCL, SUBVENT, TSR/ELSITE, Unilux, BYD, Power Electronics, DAIKIN, SIEMENS, and GREE.
Certifications & Compliance
EX-WF 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 Exhaust Ventilation for Your Project?
Tell us your airflow, room size, 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-AF Series Explosion-Proof Axial Flow Fan — ducted axial fan for long-distance hazardous ventilation
- 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 Exhaust Fans (Non-EX) — for general factory ventilation
- Bifurcated Fan — motor-out-of-airflow design for high-temperature exhaust
