From forward-curved multi-vane blowers to backward-curved EC plug fans, LONGWELL delivers stable, high-volume airflow and low-noise performance. Built with corrosion-resistant housings and flexible mounting configurations for seamless OEM equipment integration.
Send blade diameter, airflow and voltage - an engineer replies within one working day with a matching model.
Leave your name, email and phone. Longwell can follow up for specs and model selection.
Need direct technical consultation?
Send your requirements & attachments directly to our senior sales engineers at sales@longwellfans.com.
Inside these downloadable PDF brochures, you will find precise aerodynamic performance curves (PQ curves), exact dimensional drawings, wiring diagrams, and acoustic data to help you select the optimal centrifugal airflow solution for your HVAC, industrial, dust collection, or clean-air project.
Industrial centrifugal fan is specifically designed for heavy industry, factory workshops, large-scale HVAC systems, air handling units (AHUs), chemical plants, mines, and environments characterized by high temperature, high pressure, or corrosive conditions. It typically features casings constructed from thickened carbon steel or aluminum alloy, offering high mechanical strength, exceptional robustness, and long service life.
An industrial centrifugal fan primarily consists of an impeller, a collector, a volute casing, and a motor. During operation, the airflow is axially drawn into the center of the impeller; driven by the centrifugal force generated by the impeller’s rotation, the airflow is accelerated and deflected 90° in a radial direction. It then enters the volute casing or diffuser chamber, where it decelerates and expands, converting the kinetic energy of the high-velocity airflow directly into static pressure required to overcome pipeline resistance.
Industrial centrifugal fan is primarily available in 2 series: backward-type and forward-type. Backward curved industrial centrifugal fan can achieve a static pressure of up to 1,800 Pa and a airflow rate ranging from 500 to 30,000 m³/h, making it suitable for medium-to-high pressure industrial ventilation applications like AHUs, data centers, and RTUs. Forward curved model offers a static pressure range of 0–800 Pa and an airflow rate of 100–8,000 m³/h, making it ideal for low-pressure, compact applications such as FCUs and small-scale units.
Industrial centrifugal fan is constructed from stainless steel or features protective coatings, providing exceptional corrosion resistance. Equipped with explosion-proof motors, it can operate safely in environments characterized by high dust concentrations or elevated temperatures.
Thanks to the precision-engineered impeller and housing, the operating noise of industrial centrifugal fan is minimized. The minimum noise level can reach 19 dB(A), meeting your exhaust ventilation requirements in applications with stringent noise control standards.
With over 20 diameter options and 16 different airflow directions, Longwell industrial centrifugal fan can be applied across a wide range of industries. We also offer customized industrial ventilation solutions tailored to your specific operating conditions.
The design of an extremely narrow gap between the nozzle and the impeller inlet maximizes aerodynamic efficiency, enabling mechanical efficiencies as high as 86% even under high-load operating conditions.
Real-world applications of LONGWELL fans across HVAC, commercial refrigeration, and industrial ventilation.
| Background | Large office complex, Frankfurt, Germany · total gross floor area 80,000 m² |
| Products | RLM series centrifugal fan and EC motor |
| Air Flow Rate | 8,661 m³/h |
| Static Pressure | 2,114 Pa |
“Longwell EC centrifugal fans have been seamlessly integrated into our AHU system. Energy consumption has been reduced by 30%, noise levels have been kept below 45 dBA, and employee satisfaction has significantly improved. The product quality remains consistent, and the units have operated without a single failure for 18 months.”— Klaus Schmidt, Project Engineering Manager
| Background | 8,000 convenience stores, 24/7 operation |
| Products | Backward-forward Centrifugal Fan with UL/ETL certification |
| Application | Refrigerated display cabinet evaporator fan |
“セブン-イレブンのような24時間営業店舗では、冷蔵庫の信頼性が極めて重要です。Longwellの遠心ファンは低温環境(-20℃)でも安定稼働し、3年間で故障率0.1%未満を達成。省エネ性能により電気代が年間15%削減されました。”— 田中健一, 設備部長
| Customer Background | Large-scale textile factory in Hyderabad, India |
| Products | LWBE3G400 industrial centrifugal fan |
| Air Volume | 4,800 m³/h |
| Static Pressure | 1,900 Pa |
“In our textile mill with 2,000 workers, air quality is critical for health and productivity. Longwell's LWBE3G400 fans handle dust-laden air effectively while maintaining stable airflow. Energy consumption dropped 20% compared to our old system, saving ₹1.2 million annually. The robust construction means minimal downtime.”— Rajesh Kumar, Plant Manager
Engineered for stable, high-static-pressure airflow across factory ventilation, boiler draft, dust collection, large-scale HVAC, kitchen exhaust, and chemical plants — built to perform in the most demanding industrial environments.
Industrial centrifugal fans equipped with EC fans deliver high efficiency and low energy consumption even under prolonged continuous operation in factories, effectively addressing the issues of poor air circulation and rising temperatures in workshops.
Learn More
Our heavy-duty centrifugal fan is specifically designed to withstand extreme flue gas conditions ranging from 250 °C to 400 °C, as well as static pressures exceeding 3,000–10,000 Pa. It is ideally suited for the harsh and demanding operating environments in which boiler induced draft fans operate.
Learn More
After fluid dynamics simulations, our industrial centrifugal fan impeller has eliminated the 180° airflow blind spot, thereby preventing excessive dust accumulation on the blades. It is widely applied in industrial workshops for debris recovery, welding fume purification, and paint mist treatment.
Learn More
Indoor HVAC systems in large shopping malls, hospitals, office buildings, and similar facilities have stringent noise requirements. Industrial centrifugal fans, with their exceptionally quiet performance—reaching as low as 19 dB—have become the preferred choice for air handling units, fresh air systems, and other similar applications.
Learn More
Central kitchens, school cafeterias, and medium-to-large-scale restaurants require robust exhaust ventilation systems, given their extended exhaust ducts and the large volume of viscous cooking fumes that must be removed. High-capacity industrial centrifugal fans are well-suited to address these requirements.
Learn More
The primary reason why industrial centrifugal fans are highly suitable for chemical plants is their excellent corrosion resistance and high explosion-proof grade of IP55. The acidic, alkaline, or flammable and explosive gases emitted by chemical plants will not cause damage to these fans.
Learn More| Impeller Diameters | 190 / 220 / 250 / 280 / 310 / 355 / 400 / 450 / 500 / 560 / 630 / 710 mm |
| Airflow Range | 500 to 30,000 m³/h |
| Static Pressure | Up to 1,800 Pa |
| Motors | AC Three-phase / DC / EC integration |
| EC Efficiency | 88–92% (compliant with IE4 / EU ErP Tier 2 / DOE 2023) |
| Noise (typical operating conditions) | 38–65 dB(A) @ 1 m |
| Protection Rating | IP44; IP54 / IP55 / IP66 available upon customization |
| Communication Interface | 0-10V · PWM · Modbus RTU · BACnet MS-TP · CANopen |
| Working Temperature | -25℃ ~ +60℃ |
| Certifications | CE, EMC, LVD, UL, ETL, FCC, CCC, RoHS, REACH |
| Impeller Diameter | 90–315 mm |
| Airflow Range | 100–8,000 m³/h |
| Static Pressure Range | 0–800 Pa |
| EC version Efficiency | 85–89% |
| Noise level | 28–52 dB(A) @ 1 m (as low as 28–35 dB for FCU class) |
The industrial centrifugal fan is a DIDW centrifugal fan with forward curved & backward curved impellers. The fan is suitable for supply and exhaust applications in commercial, process and industrial HVAC systems.
Longwell industrial centrifugal fan is designed for durability, efficiency, and versatility across a range of industrial and commercial settings. With models tailored for precise airflow and pressure needs, Longwell's blowers provide effective solutions for HVAC, manufacturing, and large facilities.
Longwell have established their reputations through a commitment to quality, reliability, and energy-efficient performance. With fan blowers tailored to meet specific airflow needs, these brands provide solutions that deliver superior airflow control, lower energy costs, and reduced maintenance requirements across various commercial and industrial sectors.
Absolutely. Just send us your current part number. Our engineering team will provide a 1:1 cross-reference within 24 hours. We ensure exact matches for P-Q performance curves, mounting dimensions, and flange patterns, so you can swap it out without altering your existing ductwork or equipment.
No. Unlike standard commercial fans that stall under pressure, our industrial centrifugal fans are built specifically for high static loads. Whether you’re pushing air through thick HEPA filters, multi-story ductwork, or complex heat exchangers, the optimized impeller design ensures stable, high-volume air delivery without choking.
They are built for 24/7 heavy-duty operation. We use thickened carbon steel (or stainless steel) housings treated with industrial-grade anti-corrosion coatings. For extremely hot or greasy conditions, we offer isolated drive configurations to keep the motor safely out of the airstream, preventing overheating and drastically extending the fan’s lifespan.
Yes. We know standard off-the-shelf sizes don’t always fit. We offer flexible discharge angles (from 0° to 270°), custom mounting brackets, specific voltage/frequency requirements, and bare-shaft options. Our engineers can quickly modify standard designs to fit seamlessly into your machinery.
Standard models usually ship within a few days from our stock, while custom configurations take about 2 to 3 weeks. Before leaving the factory, every fan undergoes strict G2.5 dynamic balancing and a full-load run test. We pack them in reinforced, moisture-proof plywood crates so they arrive at your facility in perfect condition and ready to run.
Product certificates cover only the models listed on each document — ask which ones apply to your model. ISO certificates cover management systems, not products. Declaration of Conformity for your model and destination on request.
All document scans and what each coversSpecified and drawn by LONGWELL, built to our drawings by qualified partner factories, inspected and released to LONGWELL standards.
