Description
Volute Casing General Ventilation Fan & Kitchen Exhaust Dedicated
For general ventilation and commercial kitchen oil-fume exhaust. Features two flexible configurations (Type A volute housing and Type B kitchen exhaust square housing) with stable air delivery and strong pressure capability.
Why Choose the LWKXF2A / LWKXF2B Series
Engineered to bridge general building ventilation and specialized commercial kitchen oil-fume extraction with modular structural excellence.
Multi-Vane Optimized
Impeller and casing work in tandem to convert motor power into stable airflow and pressure while minimizing energy loss.
Thickened Carbon Steel
Spray-coated surface and robust housing offer exceptional wear and corrosion resistance for continuous heavy-duty use.
Reliable Motor Drive
Smooth drivetrain and effective cooling deliver stable exhaust with reduced fluctuations for durable, dependable operation.
Multiple Structures
Choose between Type A volute housing and Type B square kitchen casing to match your exact application layout.
Product Specifications
Comprehensive technical parameters, dimensions, and motor ratings for the LWKXF2A / LWKXF2B dual-configuration series.
| Model | Motor Power (kW) | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LWKXF2A/B-2.8A | 2.2-2 | 280 | 306 | 324 | 8-Φ10 | 194 | 226 | 254 | 3×75.3 | 260 | 292 | 320 | 3×97.3 | 12-Φ8 | 280 | 310 | 380 | 30 | 440 | 552 | 334 | 167 | 370 | 595 | 540 | 145 | 4-Φ10 |
| LWKXF2A/B-3.2A | 3-2 | 320 | 350 | 367 | 8-Φ10 | 222 | 254 | 282 | 3×84.6 | 302 | 334 | 362 | 3×111.3 | 12-Φ8 | 280 | 310 | 410 | 30 | 470 | 638 | 382 | 197 | 412 | 663 | 625 | 166 | 4-Φ10 |
| LWKXF2A/B-3.2A | 0.55-4 | 320 | 350 | 367 | 8-Φ10 | 222 | 254 | 282 | 3×84.6 | 302 | 334 | 362 | 3×111.3 | 12-Φ8 | 205 | 235 | 365 | 30 | 445 | 638 | 382 | 197 | 400 | 650 | 531 | 166 | 4-Φ10 |
| LWKXF2A/B-3.6A | 4-2 | 360 | 394 | 416 | 8-Φ10 | 244 | 282 | 313 | 4×70.5 | 275 | 313 | 341 | 4×78.3 | 16-Φ8 | 290 | 330 | 425 | 40 | 505 | 718 | 428 | 252 | 460 | 710 | 636 | 185 | 4-Φ12 |
| LWKXF2A/B-3.6A | 1.1-4 | 360 | 394 | 416 | 8-Φ10 | 244 | 282 | 313 | 4×70.5 | 275 | 313 | 341 | 4×78.3 | 16-Φ8 | 290 | 330 | 425 | 40 | 505 | 718 | 428 | 252 | 472 | 722 | 652 | 185 | 4-Φ12 |
| LWKXF2A/B-4A | 7.5-2 | 410 | 440 | 462 | 10-Φ10 | 278 | 310 | 338 | 3×103.3 | 335 | 367 | 395 | 4×91.7 | 14-Φ8 | 356 | 396 | 530 | 40 | 610 | 768 | 457 | 262 | 500 | 820 | 751 | 203 | 4-Φ14 |
| LWKXF2A/B-4A | 1.5-4 | 410 | 440 | 462 | 10-Φ10 | 278 | 310 | 338 | 3×103.3 | 335 | 367 | 395 | 4×91.7 | 14-Φ8 | 235 | 275 | 460 | 40 | 540 | 768 | 457 | 262 | 490 | 810 | 637 | 203 | 4-Φ14 |
| LWKXF2A/B-4.5A | 11-2 | 450 | 490 | 512 | 10-Φ10 | 353 | 385 | 413 | 5×77 | 348 | 380 | 408 | 5×76 | 20-Φ8 | 400 | 450 | 700 | 50 | 800 | 855 | 495 | 315 | 560 | 860 | 900 | 238 | 4-Φ14 |
| LWKXF2A/B-4.5A | 2.2-4 | 450 | 490 | 512 | 10-Φ10 | 353 | 385 | 413 | 5×77 | 348 | 380 | 408 | 5×76 | 20-Φ8 | 255 | 295 | 540 | 40 | 620 | 855 | 495 | 315 | 560 | 860 | 721 | 238 | 4-Φ14 |
| LWKXF2A/B-4.5A | 0.75-6 | 450 | 490 | 512 | 10-Φ10 | 353 | 385 | 413 | 5×77 | 348 | 380 | 408 | 5×76 | 20-Φ8 | 235 | 275 | 535 | 40 | 615 | 855 | 495 | 315 | 560 | 860 | 651 | 238 | 4-Φ14 |
| LWKXF2A/B-5A | 3-4 | 500 | 550 | 572 | 16-Φ10 | 344 | 382 | 413 | 3×127.3 | 475 | 513 | 541 | 4×128.3 | 14-Φ8 | 265 | 315 | 510 | 50 | 610 | 972 | 583 | 299 | 620 | 1018 | 760 | 259 | 4-Φ14 |
| LWKXF2A/B-5A | 1.5-6 | 500 | 550 | 572 | 16-Φ10 | 344 | 382 | 413 | 3×127.3 | 475 | 513 | 541 | 4×128.3 | 14-Φ8 | 265 | 315 | 510 | 50 | 610 | 972 | 583 | 299 | 620 | 1018 | 760 | 259 | 4-Φ14 |
| LWKXF2A/B-5.6A | 5.5-4 | 560 | 610 | 640 | 16-Φ10 | 385 | 423 | 451 | 4×105.8 | 444 | 482 | 510 | 4×20.5 | 16-Φ8 | 376 | 436 | 620 | 50 | 720 | 1100 | 649 | 392 | 1082 | 700 | 871 | 273 | 4-Φ14 |
| LWKXF2A/B-5.6A | 2.2-6 | 560 | 610 | 640 | 16-Φ10 | 385 | 423 | 451 | 4×105.8 | 444 | 482 | 510 | 4×20.5 | 16-Φ8 | 305 | 365 | 620 | 50 | 720 | 1100 | 649 | 392 | 1082 | 700 | 815 | 272 | 4-Φ14 |
| LWKXF2A/B-6A | 7.5-4 | 600 | 645 | 675 | 16-Φ10 | 418 | 450 | 478 | 4×112.5 | 528 | 560 | 588 | 4×140 | 16-Φ8 | 376 | 436 | 630 | 60 | 750 | 1144 | 677 | 383 | 1253 | 760 | 974 | 318 | 4-Φ14 |
| LWKXF2A/B-6A | 3-6 | 600 | 645 | 675 | 16-Φ10 | 418 | 450 | 478 | 4×112.5 | 528 | 560 | 588 | 4×140 | 16-Φ8 | 376 | 436 | 630 | 60 | 750 | 1144 | 677 | 383 | 1253 | 760 | 934 | 318 | 4-Φ14 |
| LWKXF2A/B-7.1A | 15-4 | 710 | 755 | 800 | 16-Φ10 | 497 | 544 | 584 | 5×108.8 | 568 | 614 | 654 | 5×122.8 | 20-Φ12 | 410 | 470 | 830 | 60 | 950 | 1396 | 821 | 494 | 1255 | 780 | 1210 | 395 | 4-Φ14 |
| LWKXF2A/B-7.1A | 4-6 | 710 | 755 | 800 | 16-Φ10 | 497 | 544 | 584 | 5×108.8 | 568 | 614 | 654 | 5×122.8 | 20-Φ12 | 376 | 436 | 705 | 60 | 825 | 1396 | 821 | 494 | 1255 | 780 | 1086 | 395 | 4-Φ14 |
| LWKXF2A/B-7.1A | 3-8 | 710 | 755 | 800 | 16-Φ10 | 497 | 544 | 584 | 5×108.8 | 568 | 614 | 654 | 5×122.8 | 20-Φ12 | 376 | 436 | 705 | 60 | 825 | 1396 | 821 | 494 | 1255 | 780 | 1086 | 395 | 4-Φ14 |
Thickened Carbon Steel Casing
With a spray-coated surface and robust structure, it offers excellent wear and corrosion resistance for continuous use in kitchen exhaust and industrial ventilation.
Engineered to withstand greasy vapors, high humidity, and continuous plant duty without compromising structural integrity.
- Spray-coated surface — superior defense against grease and moisture
- Heavy-gauge carbon steel — rigid structure for high-pressure exhaust
- Sturdy & durable — engineered for demanding kitchen environments
Powerful Airflow Performance
Optimized multi-vane impeller delivers strong, stable airflow, fast fume and heat extraction, and high duct-resistance capability for complex exhaust layouts.
Ensures high air volume delivery even when connected to long restaurant hood ducting networks.
- Optimized multi-vane impeller — high volumetric output
- Fast fume & heat extraction — clears kitchen smoke instantly
- High duct-resistance — overcomes pressure drops in complex ducts
Multi-Vane Centrifugal Optimized
The impeller and casing work together to convert motor power into stable airflow and pressure. This helps improve ventilation efficiency while reducing unnecessary airflow loss.
Precision aerodynamic engineering ensures maximum energy conservation during continuous heavy-duty operation.
- Synergistic impeller-casing design — converts power to stable pressure
- Improved ventilation efficiency — optimal air volume output
- Reduced airflow loss — aerodynamic profile minimizes turbulence
Stable Pressure for High-Resistance Ducts
Optimized fan performance helps maintain reliable airflow when duct resistance is high, making the series suitable for long, multi-section or high-rise ventilation systems.
Overcomes friction losses across complex building duct networks effortlessly.
- Long-duct capability — maintains airflow over extended runs
- High static head — powers through multi-section duct bends
- High-rise ventilation — ideal for multi-story commercial buildings
Reliable Motor Drive
Reliable motor, smooth drivetrain, and effective cooling deliver stable exhaust and reduced fluctuations for durable, dependable operation.
Engineered to maintain steady power delivery under continuous commercial kitchen shifts.
- Steady power output — prevents motor stalling under heavy loads
- Smooth drivetrain — minimizes mechanical vibration and wear
- Reliable performance — built for 24/7 heavy-duty extraction
Low-Noise Operation
Optimized aerodynamics reduce operating noise without compromising exhaust airflow — ideal for projects prioritizing both performance and workspace comfort.
Ensures continuous ventilation while maintaining acceptable acoustic levels in commercial environments.
- Optimized aerodynamics — reduces tonal noise emission
- Workspace comfort — quiet operation for staff and patrons
- Continuous ventilation — quiet 24/7 reliability
Multiple Structures for Easy Project Adaptation
From general ventilation to kitchen oil-fume exhaust, choose the configuration that fits your application. Type A provides a volute housing designed for general ventilation in buildings, factory workshops, and equipment areas, while Type B offers square kitchen exhaust housing dedicated to hotels, restaurants, canteens, and commercial kitchens.
Maximizes installation adaptability across diverse architectural layouts.
- Type A Volute Housing — general ventilation in workshops and equipment areas
- Type B Kitchen Exhaust — dedicated oil-fume extraction for canteens and commercial kitchens
- Installation adaptability — custom layout matching your exact project needs
Wide Industrial Applications
Engineered for general ventilation, factory air exchange, and commercial kitchen oil-fume extraction.
Central Kitchen Areas
High-capacity oil fume extraction for large-scale food processing facilities.
Commercial Canteens
Reliable steam and smoke removal for institutional dining canteens.
Commercial Kitchen Oil-Fume Exhaust
Dedicated Type B extraction for restaurant cooking lines and grease hoods.
Equipment Area Exhaust
Targeted heat extraction and ventilation for mechanical plant rooms.
Factory Workshop Air Exchange
Type A volute housing setup for continuous indoor climate control.
General Building Ventilation
High-volume air distribution across commercial and public buildings.
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 100% run-test ensure every LWKXF2A/B fan ships ready for installation.
Global Market & Client Preference
LWKXF2A / LWKXF2B series is the preferred centrifugal fan for HVAC distributors, kitchen contractors and OEM clients across Europe, the Middle East, Southeast Asia, and South America.
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.
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View Product →Frequently Asked Questions
Quick technical answers regarding the LWKXF2A / LWKXF2B centrifugal fan series.
What is the main difference between LWKXF2A and LWKXF2B configurations?
LWKXF2A features a volute housing optimized for general building ventilation, factory workshops, and equipment areas, while LWKXF2B is specifically engineered as a square casing unit dedicated to commercial kitchen oil-fume exhaust.
How does the multi-vane centrifugal optimized impeller enhance performance?
The impeller and casing work together to convert motor power into stable airflow and high pressure efficiently, minimizing energy loss and preventing airflow drop across complex ducts.
What casing materials are used in this dual-configuration series?
Both configurations utilize thickened carbon steel casings treated with a spray-coated surface to offer superior wear and corrosion resistance in demanding industrial and kitchen environments.
Are these fans capable of handling high-resistance duct systems?
Yes. Optimized aerodynamic performance maintains reliable airflow when duct resistance is high, making them ideal for long runs, multi-section layouts, and high-rise buildings.
How is operating noise managed in the LWKXF2A/B series?
Optimized airflow paths and precision balancing reduce operating noise without compromising exhaust volume, providing workspace comfort alongside strong extraction.
What motor drive system is equipped?
They feature a reliable motor drive with a smooth drivetrain and effective cooling, ensuring stable exhaust and reduced fluctuations during heavy 24/7 duty cycles.
Need a Quote or Custom Specs?
Tell us your airflow, static pressure, and installation requirements — our engineers will size the right LWKXF2A/B model and quote within 24 hours.
