Description
Flute High Pressure Centrifugal Fan
High Pressure Airflow for Industrial Furnace & Kiln Systems. Engineered to conquer extreme system resistance.
Product Specifications
Complete performance parameters, outline drawings, and dimensional data for the LWHFDF9-12 series.
| Model | Motor Power | 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LWHFDF9-12-4.8A | 1.5-2 | 120 | 165 | 190 | 8-Φ8 | 61 | 110 | 147 | 1×110 | 136 | 185 | 221 | 2×92.5 | 6-Φ13 | 255 | 295 | 240 | 40 | 320 | 736 | 402 | 306 | 460 | 775 | 414 | 80 | 4-Φ12 | 83 |
| LWHFDF9-12-4.8A | 2.2-2 | 120 | 165 | 190 | 8-Φ8 | 61 | 110 | 147 | 1×110 | 136 | 185 | 221 | 2×92.5 | 6-Φ13 | 255 | 295 | 240 | 40 | 320 | 736 | 402 | 306 | 460 | 775 | 440 | 80 | 4-Φ12 | 86 |
| LWHFDF9-12-4.8A | 3-2 | 120 | 165 | 190 | 8-Φ8 | 61 | 110 | 147 | 1×110 | 136 | 185 | 221 | 2×92.5 | 6-Φ13 | 255 | 295 | 240 | 40 | 320 | 736 | 402 | 306 | 460 | 775 | 451 | 80 | 4-Φ12 | 95 |
| LWHFDF9-12-5.4A | 3-2 | 155 | 205 | 245 | 8-Φ8 | 66 | 116 | 152 | 1×116 | 147 | 195 | 232 | 2×97.5 | 6-Φ13 | 255 | 295 | 240 | 40 | 320 | 807 | 447 | 331 | 500 | 840 | 466 | 95 | 4-Φ12 | 115 |
| LWHFDF9-12-5.4A | 4-2 | 155 | 205 | 245 | 8-Φ8 | 66 | 116 | 152 | 1×116 | 147 | 195 | 232 | 2×97.5 | 6-Φ13 | 285 | 325 | 300 | 40 | 380 | 807 | 447 | 331 | 500 | 840 | 486 | 95 | 4-Φ12 | 124 |
| LWHFDF9-12-5.4A | 5.5-2 | 155 | 205 | 245 | 8-Φ8 | 66 | 116 | 152 | 1×116 | 147 | 195 | 232 | 2×97.5 | 6-Φ13 | 356 | 396 | 230 | 40 | 310 | 807 | 447 | 331 | 500 | 840 | 550 | 95 | 4-Φ12 | 145 |
| LWHFDF9-12-4.7A | 2.2-2 | 175 | 240 | 265 | 8-Φ8 | 65 | 110 | 151 | 1×110 | 135 | 180 | 219 | 2×90 | 6-Φ10 | 255 | 295 | 240 | 40 | 320 | 737 | 412 | 302 | 450 | 765 | 435 | 92 | 4-Φ12 | 92 |
| LWHFDF9-12-4.7A | 3-2 | 175 | 240 | 265 | 8-Φ8 | 65 | 110 | 151 | 1×110 | 135 | 180 | 219 | 2×90 | 6-Φ10 | 255 | 295 | 240 | 40 | 320 | 737 | 412 | 302 | 450 | 765 | 465 | 92 | 4-Φ12 | 101 |
| LWHFDF9-12-4.7A | 4-2 | 175 | 240 | 265 | 8-Φ8 | 65 | 110 | 151 | 1×110 | 135 | 180 | 219 | 2×90 | 6-Φ10 | 285 | 325 | 300 | 40 | 380 | 737 | 412 | 302 | 450 | 765 | 485 | 92 | 4-Φ12 | 110 |
| LWHFDF9-12-6.8A | 15-2 | 230 | 275 | 305 | 8-Φ10 | 85 | 117 | 145 | 2×58.5 | 193 | 225 | 253 | 3×75 | 10-Φ8 | 480 | 540 | 400 | 50 | 500 | 1015 | 552 | 428 | 530 | 970 | 735 | 150 | 4-Φ18 | 280 |
| LWHFDF9-12-6.8A | 18.5-2 | 230 | 275 | 305 | 8-Φ10 | 85 | 117 | 145 | 2×58.5 | 193 | 225 | 253 | 3×75 | 10-Φ8 | 480 | 540 | 400 | 50 | 500 | 1015 | 552 | 428 | 530 | 970 | 780 | 150 | 4-Φ18 | 300 |
| LWHFDF9-12-6.8A | 22-2 | 230 | 275 | 305 | 8-Φ10 | 85 | 117 | 145 | 2×58.5 | 193 | 225 | 253 | 3×75 | 10-Φ8 | 480 | 540 | 400 | 50 | 500 | 1015 | 552 | 428 | 530 | 970 | 780 | 150 | 4-Φ18 | 317 |
| LWHFDF9-12-7.1A | 15-2 | 250 | 280 | 310 | 8-Φ10 | 88 | 120 | 148 | 2×60 | 200 | 235 | 263 | 3×78.3 | 10-Φ8 | 500 | 560 | 410 | 55 | 520 | 1067 | 580 | 447 | 560 | 1021 | 727 | 140 | 4-Φ19 | 320 |
| LWHFDF9-12-7.1A | 18.5-2 | 250 | 280 | 310 | 8-Φ10 | 88 | 120 | 148 | 2×60 | 200 | 235 | 263 | 3×78.3 | 10-Φ8 | 500 | 560 | 410 | 55 | 520 | 1067 | 580 | 447 | 560 | 1021 | 772 | 140 | 4-Φ19 | 337 |
| LWHFDF9-12-7.1A | 22-2 | 250 | 280 | 310 | 8-Φ10 | 88 | 120 | 148 | 2×60 | 200 | 235 | 263 | 3×78.3 | 10-Φ8 | 500 | 560 | 410 | 55 | 520 | 1067 | 580 | 447 | 560 | 1021 | 783 | 140 | 4-Φ19 | 355 |
| LWHFDF9-12-7.1A | 30-2 | 250 | 280 | 310 | 8-Φ10 | 88 | 120 | 148 | 2×60 | 200 | 235 | 263 | 3×78.3 | 10-Φ8 | 500 | 560 | 540 | 55 | 650 | 1067 | 580 | 447 | 560 | 1021 | 878 | 140 | 4-Φ19 | 419 |
| LWHFDF9-12-7.7A | 22-2 | 270 | 320 | 350 | 8-Φ10 | 96 | 140 | 164 | 2×70 | 215 | 255 | 281 | 3×85 | 10-Φ10 | 500 | 560 | 410 | 55 | 520 | 1147 | 626 | 485 | 600 | 1096 | 802 | 158 | 4-Φ19 | 392 |
| LWHFDF9-12-7.7A | 30-2 | 270 | 320 | 350 | 8-Φ10 | 96 | 140 | 164 | 2×70 | 215 | 255 | 281 | 3×85 | 10-Φ10 | 500 | 560 | 410 | 55 | 520 | 1147 | 626 | 485 | 600 | 1096 | 895 | 158 | 4-Φ19 | 456 |
| LWHFDF9-12-7.7A | 37-2 | 270 | 320 | 350 | 8-Φ10 | 96 | 140 | 164 | 2×70 | 215 | 255 | 281 | 3×85 | 10-Φ10 | 500 | 560 | 540 | 55 | 650 | 1147 | 626 | 485 | 600 | 1096 | 895 | 158 | 4-Φ19 | 473 |
| LWHFDF9-12-7.7A | 45-2 | 270 | 320 | 350 | 8-Φ10 | 96 | 140 | 164 | 2×70 | 215 | 255 | 281 | 3×85 | 10-Φ10 | 550 | 610 | 540 | 55 | 650 | 1147 | 626 | 485 | 600 | 1096 | 940 | 158 | 4-Φ19 | 542 |
| Model | Fan Size | Speed (r/min) | Air Volume (m³/h) | Total Pressure (Pa) | Matching Motor Model | Power (kW-p) |
|---|---|---|---|---|---|---|
| LWHFDF9-12-4.8A-0.75-2P-1-001 | 4.8A | 2840 | 232 | 5028 | Y801-2 | 0.75 |
| LWHFDF9-12-4.8A-1.1-2P-1-002 | 4.8A | 2840 | 325 | 5269 | Y802-2 | 1.1 |
| LWHFDF9-12-4.8A-1.5-2P-1-003 | 4.8A | 2840 | 418 | 5422 | Y90S-2 | 1.5 |
| LWHFDF9-12-4.8A-1.5-2P-1-004 | 4.8A | 2840 | 511 | 5466 | Y90S-2 | 1.5 |
| LWHFDF9-12-4.8A-2.2-2P-1-005 | 4.8A | 2840 | 604 | 5419 | Y90L-2 | 2.2 |
| LWHFDF9-12-4.8A-2.2-2P-1-006 | 4.8A | 2840 | 697 | 5226 | Y90L-2 | 2.2 |
| LWHFDF9-12-4.8A-3-2P-1-007 | 4.8A | 2840 | 790 | 5082 | Y100L-2 | 3.0 |
| LWHFDF9-12-4.8A-3-2P-1-008 | 4.8A | 2840 | 883 | 4828 | Y100L-2 | 3.0 |
| LWHFDF9-12-5.4A-1.5-2P-1-001 | 5.4A | 2840 | 330 | 6363 | Y90S-2 | 1.5 |
| LWHFDF9-12-5.4A-2.2-2P-1-002 | 5.4A | 2840 | 463 | 6669 | Y90L-2 | 2.2 |
| LWHFDF9-12-5.4A-2.2-2P-1-003 | 5.4A | 2840 | 595 | 6862 | Y90L-2 | 2.2 |
| LWHFDF9-12-5.4A-3-2P-1-004 | 5.4A | 2840 | 728 | 6918 | Y100L-2 | 3.0 |
| LWHFDF9-12-5.4A-3-2P-1-005 | 5.4A | 2840 | 860 | 6858 | Y100L-2 | 3.0 |
| LWHFDF9-12-5.4A-4-2P-1-006 | 5.4A | 2840 | 992 | 6690 | Y112M-2 | 4.0 |
| LWHFDF9-12-5.4A-4-2P-1-007 | 5.4A | 2840 | 1125 | 6422 | Y112M-2 | 4.0 |
| LWHFDF9-12-5.4A-5.5-2P-1-008 | 5.4A | 2840 | 1257 | 6110 | Y132S1-2 | 5.5 |
| LWHFDF9-12-4.7A-1.5-2P-1-001 | 4.7A | 2840 | 585 | 5187 | Y90S-2 | 1.5 |
| LWHFDF9-12-4.7A-2.2-2P-1-002 | 4.7A | 2840 | 747 | 5287 | Y90L-2 | 2.2 |
| LWHFDF9-12-4.7A-2.2-2P-1-003 | 4.7A | 2840 | 908 | 5416 | Y90L-2 | 2.2 |
| LWHFDF9-12-4.7A-3-2P-1-004 | 4.7A | 2840 | 1069 | 5469 | Y100L-2 | 3.0 |
| LWHFDF9-12-4.7A-3-2P-1-005 | 4.7A | 2840 | 1231 | 5416 | Y100L-2 | 3.0 |
| LWHFDF9-12-4.7A-4-2P-1-006 | 4.7A | 2840 | 1392 | 5351 | Y112M-2 | 4.0 |
| LWHFDF9-12-4.7A-4-2P-1-007 | 4.7A | 2840 | 1551 | 5187 | Y112M-2 | 4.0 |
Thickened Carbon Steel Casing
Fine craftsmanship and protective coating provide a durable surface with good wear resistance and reliable corrosion protection.
To safely contain the immense pneumatic pressure generated by the flute impeller, the volute casing is fabricated from extra-thick carbon steel plates. The flanged connections are continuously welded to prevent deformation and air leakage when supplying draft to heavy industrial furnaces.
- Carbon Steel — heavy-gauge plating resists internal static ballooning
- Protective Coating — shields the metal from harsh, corrosive factory atmospheres
- Airtight Welds — prevents pressure bleed-off in high-resistance ducting
Stable Airflow for Efficient Air Delivery
The optimized centrifugal design delivers smooth and consistent airflow, helping maintain efficient air supply for industrial ventilation and high-pressure applications.
Furnace combustion relies on a steady, pulsation-free supply of oxygen. The flute-style impeller minimizes internal aerodynamic turbulence, guaranteeing a perfectly linear discharge. This stability keeps burner temperatures uniform and prevents dangerous pressure drops inside the kiln.
- Steady Air Delivery — ensures constant forced draft for critical combustion
- Efficient Ventilation — aerodynamic housing minimizes internal energy loss
- Pulsation-Free — essential for stabilizing smelting and forging operations
High Pressure for Demanding Industrial Systems
The optimized centrifugal structure generates strong pressure to overcome system resistance, supporting reliable air supply in industrial ventilation and combustion-support applications.
Engineered to produce an exceptional static pressure of up to 6,918 Pa. This intense force is required to push air through deep material beds, complex filtration networks, and the dense environments of cement kilns where ordinary blowers would instantly stall.
- High Pressure — effortlessly overcomes extreme aerodynamic drag
- Industrial Air Supply — delivers the critical forced draft required for smelting
- Anti-Stall Design — maintains momentum against severe backpressure
Reliable Motor for Continuous Operation
The motor is matched with the fan performance requirements, providing dependable power for continuous high-pressure air delivery.
Spinning a high-pressure flute impeller requires stable, immense torque. By precisely calibrating the motor power (from 0.75 kW up to 45 kW) to the fan's maximum duty point, we eliminate the risk of thermal overload, ensuring the powertrain runs reliably shift after shift.
- Matched Motor — calibrated strictly against the required pressure load
- Dependable Power — eliminates startup stalling and thermal overloading
- Continuous Duty — built for 24/7, non-stop heavy industrial processing
Secure Mounting Base
The reinforced mounting base provides reliable structural support and allows secure installation on equipment or foundations, helping maintain a stable installation during operation.
Operating at extreme pressures creates significant mechanical torque. The heavy welded steel frame directly integrates the casing and the motor, preventing misalignment. Pre-drilled anchor holes allow for rapid, vibration-free bolting to concrete pads or structural machinery framing.
- Reinforced Base — massive steel chassis absorbs rotational vibration
- Secure Mounting — prevents the unit from shifting under severe pneumatic load
- Perfect Alignment — protects the motor bearings from offset stress
Low Noise & Stable Operation
Optimized impeller and compact structure ensure smooth airflow, stable operation and low noise.
Every rotating assembly undergoes strict static and dynamic balancing before leaving the factory. This precision tuning, combined with the heavy-duty steel base and aerodynamic casing, mitigates operational resonance, keeping acoustic signatures within acceptable industrial limits.
- Stable Airflow — engineered volute limits internal air collision
- Reliable Operation — dynamic balancing eliminates eccentric shaft shaking
- Reduced Resonance — rigid panels minimize mechanical noise transmission
Designed for Kiln & Furnace Air Supply
The specialized flute geometry delivers concentrated, high-velocity oxygen to sustain intense combustion processes.
Standard blowers cannot penetrate the dense material beds found in industrial forging and cement kilns. The LWHFDF9-12 is purpose-built to act as the primary forced draft fan, injecting a highly concentrated, steady stream of air directly into the combustion chamber to maximize fuel efficiency and heat yield.
- Furnace Draft — ensures critical oxygen delivery for heavy smelting
- Kiln Operations — pushes through the severe backpressure of cement production
- Concentrated Air Jet — the flute-type outlet maximizes discharge velocity
Wide Range of Industrial Applications
Built to conquer extreme system resistance in heavy manufacturing, kilns, and forced draft combustion.
Cement Production
Overcomes severe duct resistance to supply stable combustion air directly into rotary kilns.
Metallurgy
Delivers intense, high-pressure forced draft essential for stabilizing heavy smelting operations.
Furnace & Kiln Systems
Maintains pulsation-free oxygen delivery to keep internal burning temperatures perfectly uniform.
Forging Industry
Provides high-velocity blast air to metal forging furnaces, ensuring rapid and continuous heating.
Chemical Processing Plants
Forces heavy chemical exhaust through complex, high-resistance multi-stage scrubber systems.
Industrial Ventilation
Generates immense static pressure to extract dense fumes safely across long factory pipelines.
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 LWHFDF9-12 fan arrives ready to install.
Global HVAC&R Exhibitions Participation
Meeting machinery builders, project contractors, and OEM engineering teams at international trade fairs worldwide.
Trusted by Leading Global OEM Brands
24+ equipment builders rely on LONGWELL for industrial centrifugal blowers 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 LWHFDF9-12 series is specified by machinery manufacturers 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 LWHFDF9-12 flute high pressure centrifugal fan.
What is the primary application for the LWHFDF9-12 flute centrifugal fan?
This specific flute-type high-pressure fan is engineered for industrial combustion systems. It is primarily used to provide intense, steady forced draft air to industrial furnaces, cement kilns, metallurgy smelters, and forging machinery.
What makes the "flute" design different from standard blowers?
The flute-style volute and narrow impeller geometry are optimized to generate extremely high static pressure (up to 6,918 Pa) at relatively lower volumetric flow rates. This allows it to easily punch through severe resistance in deep furnace beds and complex pipeline systems.
What material is used for the casing to withstand such pressure?
The casing is fabricated from premium thickened carbon steel. This structural rigidity ensures the housing will not drum, warp, or deform under extreme internal pneumatic pressure, and it is finished with a protective coating to resist corrosive factory environments.
How is the motor mounted on this fan?
It utilizes a heavy-duty, integrated mounting base where the industrial motor is securely flanged or pedestal-mounted directly to the fan structure. This ensures perfect shaft alignment and eliminates vibration during continuous S1 operation.
Need a Quote or Custom Specs?
Send us the air volume, total pressure, and installation layout. Our engineers will match the right LWHFDF9-12 model and reply within 24 hours.
