Description
Oil Smoke Exhausting Centrifugal Fan
Engineered specifically for commercial kitchen oil-fume exhaust and high-resistance duct systems. Features an optimized multi-vane impeller and a robust heavy-duty casing to maintain stable airflow when pushing against high duct resistance.
Key Technical Features
Built for demanding commercial extraction, high duct resistance, and continuous reliable operation.
Thickened Casing
Heavy-gauge carbon steel with a spray-coated surface offers excellent wear and corrosion resistance in greasy environments.
Powerful Airflow
Optimized multi-vane impeller generates strong, stable airflow, easily overcoming pressure drops in long exhaust layouts.
Reliable Motor
Smooth drivetrain and effective cooling deliver stable exhaust and reduced fluctuations for durable, dependable operation.
Low Noise
Optimized aerodynamics reduce operating noise without compromising exhaust performance, ensuring workspace comfort.
Technical Specifications
LWKXF Series dimensional parameters and performance data across standard models.
Dimensions (mm) - Selected Models
| Model | Motor Power | Φ1 | Φ2 | Φ3 | n1-d1 | A1 | A2 | A3 | a×x | B1 | B2 | B3 | b×y | n2-d2 | H | H1 | L | L1 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LWKXF-2A | 1.1-2 | 160 | 180 | 196 | 6-Φ7 | 120 | 160 | 188 | 2×80 | 200 | 240 | 268 | 3×80 | 10-Φ8 | 260 | 418 | 380 | 98 |
| LWKXF-2A | 0.37-4 | 160 | 180 | 196 | 6-Φ7 | 120 | 160 | 188 | 2×80 | 200 | 240 | 268 | 3×80 | 10-Φ8 | 260 | 418 | 380 | 98 |
| LWKXF-2.25A | 2.2-2 | 170 | 195 | 215 | 6-Φ8 | 137 | 175 | 203 | 2×87.5 | 166 | 204 | 232 | 3×68 | 10-Φ8 | 310 | 475 | 469 | 101 |
| LWKXF-2.5A | 1.1-4 | 210 | 235 | 260 | 6-Φ8 | 158 | 190 | 218 | 2×90 | 165 | 197 | 225 | 2×98.5 | 8-Φ8 | 280 | 465 | 468 | 116 |
| LWKXF-3A | 2.2-4 | 260 | 290 | 314 | 6-Φ8 | 184 | 223 | 251 | 3×74.3 | 243 | 282 | 310 | 4×70.5 | 14-Φ8 | 380 | 600 | 570 | 133 |
| LWKXF-4A | 7.5-4 | 340 | 370 | 400 | 6-Φ8 | 255 | 287 | 315 | 3×95.6 | 376 | 415 | 443 | 4×94.5 | 16-Φ8 | 500 | 737 | 171 | 737 |
| LWKXF-5A | 11-6 | 390 | 450 | 470 | 12-Φ10 | 342 | 374 | 402 | 4×93.5 | 370 | 402 | 430 | 4×100.5 | 16-Φ8 | 620 | 944 | 220 | 944 |
| LWKXF-6.3A | 15-6 | 536 | 565 | 600 | 12-Φ12 | 430 | 462 | 490 | 4×115.5 | 466 | 498 | 526 | 4×124.5 | 16-Φ8 | 760 | 1095 | 274 | 1095 |
Performance Data
| Model | Speed (r/min) | Power (KW-P) | Air Volume (m³/h) | Total Pressure (Pa) |
|---|---|---|---|---|
| LWKXF-2A-1.1-2P-1-001 | 2900 | 1.1-2 | 2960-2300 | 820-1100 |
| LWKXF-2A-0.37-4P-1-002 | 1450 | 0.37-4 | 1620-1300 | 320-450 |
| LWKXF-2.25A-2.2-2P-1-001 | 2900 | 2.2-2 | 4227-3345 | 1644-1741 |
| LWKXF-2.5A-1.1-4P-1-003 | 1450 | 1.1-4 | 3322-2600 | 760-850 |
| LWKXF-3A-2.2-4P-1-001 | 1450 | 2.2-4 | 6275-5032 | 876-960 |
| LWKXF-3.5A-4-4P-1-001 | 1450 | 4-4 | 9354-7267 | 1120-1276 |
| LWKXF-4A-7.5-4P-1-001 | 1450 | 7.5-4 | 13696-9500 | 1220-1530 |
| LWKXF-4.5A-4-6P-1-001 | 960 | 4-6 | 13100-8500 | 573-811 |
| LWKXF-5A-11-6P-1-001 | 960 | 11-6 | 24000-18000 | 960-1068 |
| LWKXF-6.3A-15-6P-1-002 | 960 | 15-6 | 33000-30000 | 900-1200 |
Thickened Carbon Steel Casing
Commercial kitchen extraction subjects equipment to high temperatures, heavy grease loads, and continuous operation. The LWKXF casing is constructed from heavy-gauge, thickened carbon steel.
Treated with an industrial-grade spray-coated surface, this robust structure offers exceptional wear and corrosion resistance. It prevents grease from deteriorating the housing, ensuring the structural integrity of the fan remains intact over years of rigorous kitchen exhaust and industrial ventilation duty.
- Heavy-gauge carbon steel — Resists structural deformation under high load
- Spray-coated surface — Excellent wear and corrosion protection
- Sturdy & Durable — Built specifically for continuous kitchen exhaust
Stable Pressure for High-Resistance Ducts
Complex building layouts often require long exhaust runs with multiple bends, leading to significant pressure drops that ordinary fans cannot overcome. The LWKXF is specifically engineered to handle high-resistance duct systems.
Its optimized centrifugal performance curve allows the fan to maintain strong, reliable airflow even when pushing against substantial duct resistance. This makes the series perfectly suited for long, multi-section pipeline layouts or vertical high-rise ventilation systems.
- Long-duct capability — Pushes air through complex, multi-bend layouts
- High static pressure — Maintains volume against severe duct resistance
- Reliable airflow — Prevents fume backup in high-rise vertical shafts
Multi-Vane Centrifugal Optimized
The core of the LWKXF's performance lies in its multi-vane centrifugal impeller. The densely arranged vanes are aerodynamically optimized to capture and compress heavy, grease-laden air efficiently.
The impeller and the volute casing work synchronously to convert raw motor power into highly stable airflow and pressure. This precision engineering significantly improves overall ventilation efficiency while reducing unnecessary airflow loss and internal turbulence.
- Multi-vane impeller — Highly efficient air compression
- Optimized aerodynamics — Reduces unnecessary airflow loss
- Synchronized casing — Converts motor power to stable pressure
Powerful Airflow Performance
Commercial kitchens generate massive volumes of heat and smoke instantaneously during peak hours. The LWKXF series provides the high air volume capacity required to handle these sudden surges.
The optimized multi-vane impeller ensures fast fume and heat extraction, keeping the kitchen environment clear, cool, and safe. Its strong, stable airflow prevents grease from settling within the immediate hood area, pulling it effectively into the filtration system.
- High air volume — Delivers up to 33,000 m³/h capacity
- Fast fume extraction — Rapidly clears heavy smoke and heat
- Stable delivery — Prevents grease settling in the hood
Reliable Motor Drive
A heavy-duty impeller requires a robust drive system. The LWKXF is equipped with a high-performance industrial motor designed for steady power output under continuous load.
The smooth drivetrain and highly effective motor cooling mechanisms minimize thermal buildup. This delivers incredibly stable exhaust performance, reduced operational fluctuations, and ensures a durable, dependable lifespan across long kitchen shifts.
- Steady power output — Handles continuous commercial loads effortlessly
- Effective cooling — Prevents thermal trips during peak hours
- Smooth operation — Reduces mechanical fluctuations for reliable exhaust
Low-Noise Operation
High-volume extraction often comes at the cost of disruptive noise, but the LWKXF series is designed to prioritize workspace comfort. The optimized aerodynamics significantly reduce operating noise without compromising on the critical exhaust airflow.
By minimizing internal air turbulence and mechanical vibration, this fan is ideal for commercial projects—like high-end restaurants or central kitchens—that demand both powerful fume extraction and a quiet, comfortable environment for the staff.
- Optimized aerodynamics — Drastically reduces wind noise
- Continuous ventilation — Maintains high volume quietly
- Workspace comfort — Ideal for noise-sensitive commercial kitchens
Multiple Casing Options
Installation environments vary drastically from site to site. To accommodate different architectural constraints and ductwork layouts, the LWKXF series is available in multiple casing designs.
The standard **A-Type** casing provides conventional discharge angles for typical rooftop or exterior wall installations. The **B-Type Square** casing offers a compact, easily integrable form factor for tight mechanical rooms or specialized OEM equipment enclosures.
- A-Type Standard — Ideal for conventional duct layouts and rooftops
- B-Type Square — Compact form factor for tight equipment integration
- Highly Adaptable — Meets diverse architectural constraints
Wide Industrial Applications
Engineered for kitchen oil-fume exhaust, high-resistance duct systems, and heavy industrial ventilation.
Central Kitchens
High-capacity oil fume extraction for large-scale food processing centers.
Commercial Kitchens
Reliable grease and smoke removal for restaurant and hotel cooking lines.
Ducted Air-Exchange Systems
Maintains continuous fresh air exchange across complex duct networks.
High-Resistance Duct Projects
Overcomes severe pressure drops in long, multi-bend ventilation runs.
High-Rise Buildings
Powerful vertical exhaust capability for multi-story commercial properties.
Restaurants & Catering
Odor and fume control for dining establishments and catering facilities.
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 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 technical answers regarding the LWKXF series oil smoke exhausting centrifugal fan.
What is the primary application of the LWKXF centrifugal fan?
The LWKXF series is specifically engineered for commercial kitchen oil-fume exhaust and high-resistance duct systems, providing stable airflow and strong static pressure against grease and smoke buildup.
What are the advantages of the multi-vane centrifugal optimized impeller?
The multi-vane design converts motor power into stable airflow and pressure efficiently, reducing unnecessary airflow loss and preventing rapid grease accumulation on blades.
What casing options are available for the LWKXF series?
It offers A-Type Standard Casing for conventional ventilation layouts and B-Type Square Casing for project-specific equipment integration and compact installation spaces.
How does the thickened carbon steel casing protect the fan?
The heavy-gauge carbon steel housing features a robust spray-coated surface that offers excellent wear and corrosion resistance, ensuring continuous dependable operation in greasy and harsh environments.
Is the LWKXF series suitable for long or multi-section duct runs?
Yes. Optimized fan performance and high static pressure capability help maintain reliable airflow when duct resistance is high, making it ideal for long, multi-section, or high-rise ventilation systems.
Need a Quote or Custom Specifications?
Tell us your airflow, static pressure, and installation requirements — our engineers will size the right LWKXF model and provide a quote within 1 business day.
