The EC centrifugal fan series (Model LWBE3G500, including variants LWBE3G500-138NT-13, LWBE3G500-188NT-14, LWBE3G500-188NT-08, LWBE3G500-188NT-09, and LWBE3G500-188NT-10) engineered by Guangdong Lebisen Fan Co., Ltd represents a breakthrough in high-performance thermal management and air movement systems. Specifically built as a robust 400V centrifugal fan, this industrial exhaust fan combines advanced electronic commutation (EC) technology with an unbracketed, bare-machine layout designed for seamless integration into custom housing units, AHU systems, and complex ventilation networks. Operating on standard 400V 3-phase power supplies, this backward-curved fan series ranges in power input from 870W up to 4270W, delivering exceptional volumetric airflow from 8,137 cubic meters per hour up to 13,472 cubic meters per hour, alongside towering static pressure metrics reaching 1,541 Pa. Whether deployed as a high-head energy-efficient HVAC fan in commercial complexes, a reliable industrial exhaust fan across heavy manufacturing facilities, or an advanced cooling component for large-scale data centers, this series ensures optimal thermodynamic efficiency. Every EC centrifugal fan features durable aluminum alloy impellers, high-precision ball bearings for S1 continuous duty cycles, IP54 or IP44 ingress protection, and F-class thermal insulation. Supported by comprehensive international safety certifications including ISO, BSCI, and CE, our direct-factory supply model as a trusted OEM centrifugal fan supplier guarantees stable inventory, rigorous quality control, and flexible OEM/ODM engineering customization to match specialized industrial requirements globally.

The LWBE3G500 series of backward-curved fan units is meticulously engineered to address the demanding airflow and pressure requirements of modern industrial environments. Featuring an external-rotor motor configuration, this 400V centrifugal fan achieves an exceptionally compact footprint while maximizing aerodynamic efficiency. The design presents a clean, unbracketed bare-machine appearance, showcasing precision-machined aluminum alloy backward-curved fan blades and a heavy-duty motor assembly that facilitates direct integration into customized scroll housings, ventilation boxes, and specialized air purification machinery.

Built for rigorous, round-the-clock continuous operation (S1 working mode), each EC centrifugal fan is equipped with high-precision ball bearings that dramatically reduce mechanical friction, lower operational acoustic levels, and extend the service lifecycle beyond 40,000 hours. The aerodynamic blade geometry of this backward-curved fan ensures smooth, non-overloading airflow dynamics, allowing the system to maintain stable performance even when operating against heavy static pressure drops caused by multi-stage filtration networks. With an operational temperature range spanning from -25 degrees Celsius to +60 degrees Celsius, alongside IP54 or IP44 environmental protection ratings and F-class electrical insulation, this industrial exhaust fan thrives in harsh industrial settings, high-humidity duct lines, and high-temperature thermal management systems. Guangdong Lebisen Fan Co., Ltd provides complete technical support, including detailed aerodynamic performance curves and CAD documentation, empowering engineers and procurement specialists to select and integrate the ideal energy-efficient HVAC fan model for their exact project specifications.

• Advanced EC Motor Technology: Built with modern electronic commutation, this EC centrifugal fan supports external control signals for precise variable-frequency speed modulation and high energy savings.

• High-Grade Aluminum Alloy Impeller: The lightweight yet structurally rigid backward-curved fan blades ensure optimal aerodynamic efficiency and vibration-free rotation.

• Unbracketed Bare-Machine Layout: Designed without fixed mounting brackets, offering mechanical flexibility for direct integration into custom energy-efficient HVAC fan housings and specialized equipment.

• Continuous S1 Duty Cycle: Engineered with high-precision ball bearings and F-class thermal insulation, ensuring this industrial exhaust fan handles continuous heavy-duty operations reliably.

• Robust Environmental Protection: Rated at IP54 or IP44 ingress protection, guarding internal electrical components against dust and moisture across extreme ambient conditions (-25°C to +60°C).

• Direct Manufacturer Supply & Customization: Backed by Guangdong Lebisen Fan Co., Ltd acting as your premier OEM centrifugal fan supplier, offering complete solutions and international quality standards.

Deploying a high-tier EC centrifugal fan provides distinct thermodynamic, electrical, and operational advantages over conventional AC induction alternatives:

1. Aerodynamic Stability & Non-Overloading Characteristics

2. High Static Pressure Generation

3. Electrical Efficiency via Electronic Commutation

• Ventilation & HVAC Engineering: Functions as a central energy-efficient HVAC fan and air-handling module in commercial buildings and large infrastructure.

• Industrial Cooling & Exhaust: Serves as a heavy-duty industrial exhaust fan in manufacturing plants, workshops, and chemical processing facilities.

• Data Center Thermal Management: Provides reliable cooling for high-density server rooms, telecom hubs, and electrical power cabinets.

• Cold Chain & Refrigeration: Ideal for large cold storage air distribution, commercial refrigerators, and freezing equipment.

• Medical & Specialized Equipment: Integrated into cleanroom ventilation, medical device cooling, and precision electronic enclosures.

As a direct manufacturer and leading OEM centrifugal fan supplier, Guangdong Lebisen Fan Co., Ltd delivers outstanding commercial value by cutting out intermediary markups, offering competitive tier pricing starting from trial orders of 100 units with generous volume discounts. Our engineering teams in strategic international service hubs like Russia and Poland, combined with our primary manufacturing base, ensure rapid communication, localized technical support, and strict compliance with global quality standards including ISO, BSCI, and CE. Whether you need a customized backward-curved fan solution with specialized electrical wiring, unique mounting dimensions, or custom airflow mapping, our dedicated OEM/ODM partnership program brings your exact project specifications to market efficiently.