Description
Dust Exhausting Centrifugal Fan
Engineered for reliable extraction of dust-laden air, wood chips, and fine fibers across continuous industrial operations.
Key Features at a Glance
A heavy-duty belt-drive ventilation platform built to withstand the continuous abrasion of material conveying.
Product Specifications
Complete performance parameters, outline drawings, and dimensional data for the LWFDF4-73 series.
| Model | Φ1 | Φ2 | Φ3 | n1-d1 | A1 | A2 | A3 | a×x | B1 | B2 | B3 | b×y | n2-d2 | C1 | C2 | C3 | C4 | C5 | E | E1 | E2 | H | H1 | L | L1 | n3-d3 | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LWFDF4-73-3.6A | 360 | 394 | 416 | 8-Φ10 | 226 | 264 | 295 | 2×132 | 275 | 313 | 341 | 4×78.3 | 12-Φ8 | 334 | 370 | 370 | 50 | 840 | 718 | 428 | 252 | 470 | 718 | 690 | 144 | 6-Φ12 | 93 |
| LWFDF4-73-4.5A | 450 | 490 | 512 | 16-Φ10 | 315 | 345 | 373 | 3×115 | 348 | 380 | 408 | 5×76 | 16-Φ8 | 394 | 430 | 415 | 50 | 930 | 885 | 525 | 315 | 560 | 860 | 870 | 186 | 6-Φ14 | 160 |
| LWFDF4-73-5.5A | 560 | 610 | 640 | 16-Φ10 | 383 | 413 | 441 | 5×82.6 | 438 | 470 | 498 | 5×94 | 20-Φ8 | 594 | 630 | 500 | 50 | 1050 | 1093 | 642 | 392 | 700 | 1082 | 935 | 221 | 6-Φ14 | 192 |
| Model | Speed (r/min) | Matching Motor (kW-p) | Flow Rate (m³/h) | Total Pressure (Pa) |
|---|---|---|---|---|
| LWFDF4-73-3.6A-7.5-2P-1-001 | 4000 | 7.5-2 | 4250-7760 | 3138-1863 |
| LWFDF4-73-3.6A-4-2P-1-002 | 3150 | 4.0-2 | 3100-5750 | 1863-1127 |
| LWFDF4-73-3.6A-2.2-2P-1-003 | 2500 | 2.2-2 | 2640-4870 | 1225-735 |
| LWFDF4-73-3.6A-1.5-2P-1-004 | 2240 | 1.5-2 | 2380-4350 | 1029-588 |
| LWFDF4-73-3.6A-0.75-2P-1-005 | 1800 | 0.75-2 | 1930-3510 | 637-392 |
| LWFDF4-73-3.6A-0.75-4P-1-006 | 1600 | 0.75-4 | 1725-3150 | 490-294 |
| LWFDF4-73-4.5A-15-2P-1-001 | 3550 | 15-2 | 7400-13500 | 3922-2255 |
| LWFDF4-73-4.5A-7.5-2P-1-002 | 2800 | 7.5-2 | 5800-10500 | 2451-1422 |
| LWFDF4-73-4.5A-2.2-2P-1-003 | 1800 | 2.2-2 | 3700-6800 | 980-588 |
| LWFDF4-73-4.5A-1.1-4P-1-004 | 1400 | 1.1-4 | 2900-5300 | 608-362 |
| LWFDF4-73-5.5A-22-2P-1-001 | 2800 | 22-2 | 10600-19350 | 3665-2175 |
| LWFDF4-73-5.5A-11-2P-1-002 | 2240 | 11-2 | 8400-15350 | 2314-1372 |
| LWFDF4-73-5.5A-5.5-2P-1-003 | 1800 | 5.5-2 | 6800-12400 | 1471-872 |
| LWFDF4-73-5.5A-3-2P-1-004 | 1400 | 3-2 | 5260-9650 | 902-539 |
| LWFDF4-73-5.5A-1.5-4P-1-005 | 1120 | 1.5-4 | 4220-7700 | 578-343 |
Strong Airflow Reliable Pressure
Designed to move process air steadily through ducted extraction and ventilation systems.
Engineered to maintain robust suction velocities, the LWFDF4-73 delivers air volumes ranging from 1,725 m³/h to 19,350 m³/h. The geometry of the scroll housing ensures that extraction power remains stable, easily overcoming the static resistance created by collection bins, duct elbows, and filtration units.
- Efficient Air Intake — captures airborne particulate right from the source
- Stable Discharge — up to 3,922 Pa of reliable total pressure
- Duct-system Ready — minimizes performance drops over long pipe runs
Purpose-built for Dust-Laden Air
Handles air containing industrial dust, wood chips, and fine fibrous materials in extraction systems.
Unlike standard blowers that clog easily, this fan utilizes an open impeller geometry tailored for material handling. It safely propels abrasive and fibrous materials through the casing without snagging, maintaining balance and preventing unexpected shutdowns.
- Industrial Dust — clears grinding and sanding particulate efficiently
- Wood Chips — open blade passages prevent wood scrap blockages
- Fine Fibers — resists lint and textile fluff accumulation
Durable Carbon Steel Casing
A reinforced structure and protective painted finish support dependable long-term operation.
Material conveying is inherently abrasive. The LWFDF4-73 is fabricated from thickened carbon steel plates to endure the continuous impact of dust and wood chips. A tough, corrosion-resistant exterior coating further protects the metal against harsh plant environments, extending the operational lifespan of the entire unit.
- Reinforced Fan Housing — thickened carbon steel casing for high strength and stability
- Protective Painted Finish — corrosion-resistant coating for harsh working environments
- Rigid Steel Base — stable and durable support for continuous operation
Efficient Centrifugal Impeller
Optimized blade geometry supports smooth, stable airflow through industrial exhaust systems.
Every impeller is precision-welded and rigorously balanced before assembly. This aerodynamic profiling not only ensures that high-velocity air carries debris out effectively without separating, but it also dramatically reduces mechanical vibration that typically leads to premature bearing failure.
- Smooth Airflow — engineered to prevent aerodynamic stall under load
- Balanced Rotation — eliminates eccentric shaking during high-speed runs
- Reliable Aerodynamic Performance — consistent extraction power over time
Reliable Belt-drive Transmission
A separated motor and guarded belt system provide practical drive flexibility and safer operation.
Mounting the motor completely outside the contaminated airstream eliminates the risk of overheating from dust blanketing the motor fins. The belt-drive configuration also permits fine-tuning of the fan’s RPM via pulley adjustments, allowing plant engineers to perfectly balance the exhaust rate against system demands.
- Separated Motor Layout — protects the motor from heavy particulate damage
- Drive Flexibility — easily modify fan speeds by swapping pulleys
- Safer Operation — fully guarded belt enclosure protects facility personnel
Reliable Motor & Stable Foundation
Matched power, rigid support, and an adjustable motor mount help maintain dependable continuous operation.
Supplied with robust industrial asynchronous motors (from 0.75 kW to 22 kW), the LWFDF4-73 is ready for uninterrupted heavy-duty shifts. The motor sits on sliding rails integrated directly into the heavy steel base frame, making belt tensioning and routine maintenance straightforward without unbolting the entire assembly.
- Reliable Power — efficient motor matched for S1 continuous duty
- Stable Support — rigid steel base for secure operation
- Easy Maintenance — adjustable motor mount for convenient servicing
Wide Industrial Applications
Built for dust extraction, process-air handling and general industrial ventilation.
Dust Collection Systems
Provides high-suction velocity to pull industrial particulate into central filter bins.
Woodworking Workshops
Reliable extraction of sawdust, wood chips, and sanding dust from carpentry machinery.
Textile & Fiber Processing
Conveying fine airborne fibers, lint, and textile fluff without clogging the impeller.
Grain & Feed Processing
Strong static pressure for pneumatic conveying of granular agricultural materials.
Industrial Equipment Exhaust
Forced-air cooling and robust heat dissipation for production machinery and ovens.
General Factory Ventilation
High-volume extraction to clear out heavy industrial smoke, heat, and stale air.
LONGWELL — Trusted Industrial Fan Manufacturer Since 1990
Founded in 1990 in Yuyao, Ningbo — the heart of China’s advanced manufacturing belt — LONGWELL has grown from a precision fan component workshop into a vertically integrated ventilation technology group. Today we engineer AC, DC and EC fan and motor systems with 4,000 m²+ of manufacturing floor, dedicated aerodynamics and CFD simulation labs, and a global export network spanning Europe, the Americas and Asia-Pacific.
From material selection to final balancing, every LONGWELL fan is built on automated lines, computer-balanced impellers and 100% run-test before shipment. We are certified to ISO 9001:2015 and ISO 14001, with CE, UL/ETL, RoHS and EAC compliance, and performance tested to the AMCA 210/211 method.
Production & Delivery
Automated lines, computer-balanced impellers and a 100% run-test on every unit, so each LWFDF4-73 fan arrives ready to install.
Global HVAC&R Exhibitions Participation
Meeting HVAC distributors, project contractors, and OEM engineering teams at international trade fairs worldwide.
Trusted by Leading Global HVAC Brands
24+ HVAC OEMs and equipment builders rely on LONGWELL for industrial centrifugal fans every year.
Complete Range of Professional & Certified
LONGWELL fans are independently certified to international quality, safety and energy-efficiency standards.
Global Market & Client Preference
The LWFDF4-73 series is specified by HVAC distributors, material handling contractors and OEM clients across Europe, the Middle East, Southeast Asia and the Americas.
Related Products
Explore other LONGWELL industrial centrifugal fans and blowers for diverse pressure, airflow, and exhaust requirements.
LWERC Series External-Rotor Energy-Saving Centrifugal Fan
Compact external-rotor centrifugal blower engineered for energy-saving cabinet and ducted ventilation.
View Product →
LWMPF Middle Pressure Blower
Cast-housing medium-pressure centrifugal blower for industrial air supply, combustion, and material conveying.
View Product →
LWFDF4-79A / 4-2X79E Centrifugal Fan
High-volume single and double-inlet centrifugal fan for large-scale building and plant HVAC systems.
View Product →
LWKXF Oil-Smoke Exhausting Centrifugal Fan
Box-type low-noise centrifugal exhaust unit built for commercial kitchen fumes and inline duct extraction.
View Product →
LWFDF11-62 Low-Noise Multi-Vane Centrifugal Fan
Forward-curved multi-vane centrifugal fan designed for low-noise kitchen exhaust and general ventilation.
View Product →
LWFDF6-48 Dust-Exhausting Centrifugal Fan
Wear-resistant centrifugal fan engineered for wood chips, dust collection, and particulate-laden air streams.
View Product →
LWHFDF8-09 / LWHFDF9-12 High-Pressure Centrifugal Fan
Heavy-duty high-pressure blower for smelting furnaces, forging ovens, and high-resistance gas conveying.
View Product →
LWIDF6-41 Series Boiler Induced-Draft Fan
High-temperature induced-draft centrifugal fan designed for industrial steam boilers and flue gas exhaust.
View Product →
Roots Blower
Positive-displacement rotary lobe blower for wastewater aeration, pneumatic conveying, and process gas supply.
View Product →Frequently Asked Questions
Quick technical answers about the LWFDF4-73 dust exhausting centrifugal fan series.
What type of air can the LWFDF4-73 centrifugal fan handle?
The LWFDF4-73 is specifically purpose-built to handle air containing industrial dust, wood chips, and fine fibrous materials without clogging or losing performance.
What is the airflow and pressure range for this series?
This series delivers air volumes ranging from 1,725 m³/h up to 19,350 m³/h, and total static pressures from 294 Pa up to 3,922 Pa, ensuring efficient extraction through long duct networks.
How is the LWFDF4-73 fan driven?
It utilizes a reliable belt-drive transmission. This separates the motor from the particulate-laden airstream and provides practical flexibility to adjust the fan's running speed.
Is the motor mounting adjustable?
Yes, the fan features an adjustable motor mount integrated into the rigid steel base, which makes routine belt tensioning and servicing convenient and straightforward.
Where is this fan typically installed?
It is widely used in dust collection systems, woodworking facilities, textile equipment, grain machinery operations, and general factory ventilation setups.
Need a Quote or Custom Specs?
Send us the air volume, total pressure, and installation layout. Our engineers will match the right LWFDF4-73 model and reply within 24 hours.
