Welcome to the ultimate industrial ventilation solution powered by advanced EC backward-curved centrifugal fan technology. Manufactured by Guangdong Lebisen Fan Co., Ltd, the LWBE3G500 series—featuring models LWBE3G500-188PT-02 and LWBE3G500-188PT-05—is specifically engineered for high-performance air purifiers, duct fans, data centers, and heavy-duty industrial ventilation. Designed to operate at 400V, this 400V centrifugal fan merges cutting-edge electronic commutation (EC) with robust aluminum alloy construction, guaranteeing maximum energy efficiency, precise speed control, and long-term operational reliability. Whether you are outfitting a large factory ventilation system or designing an advanced smoke extraction setup, our EC backward-curved centrifugal fan delivers unmatched static pressure and high airflow volume.

The LWBE3G500 series represents the pinnacle of modern HVACR engineering. As a premium industrial exhaust fan, it features an external-rotor motor design that compacts the overall dimensions while optimizing aerodynamic performance. The integrated square flange bracket allows for effortless, direct installation into duct systems and housing units, reducing assembly time for system integrators.

Engineered for continuous duty (S1 operational mode), this EC backward-curved centrifugal fan utilizes high-precision ball bearings to minimize friction, lower acoustic levels, and extend service life. The aerodynamic backward-curved aluminum alloy impeller ensures optimal airflow characteristics, delivering up to 13472 cubic meters per hour of airflow at a striking 1541 Pa static pressure for the -05 model. With an IP54 protection rating and F-class insulation, this 400V centrifugal fan thrives in harsh industrial environments, handling operating temperatures from -25 degrees Celsius up to +60 degrees Celsius with ease.

• Integrated Mounting Bracket: Comes with a heavy-duty square flange bracket (630mm x 630mm frame with a 440mm inner hole), making this industrial exhaust fan straightforward to mount securely into existing or new framework.

• Aluminum Alloy Impeller: The lightweight yet durable EC backward-curved centrifugal fan impeller ensures high structural integrity and smooth, vibration-free aerodynamic performance.

• Smart EC Motor Technology: Features an advanced electronic commutated motor supporting external signal speed control, maximizing energy efficiency across variable loads.

• Rugged Environmental Protection: Rated at IP54 with F-class insulation, ensuring this 400V centrifugal fan resists dust and moisture ingress in complex industrial settings.

• Flexible Customization: Direct manufacturer supply offering comprehensive OEM/ODM solutions tailored to unique performance, voltage, or structural requirements.

• Comprehensive Documentation: Supported by complete CAD drawing packages and certified performance curves to streamline engineering selection and project bidding.

Investing in a high-tier EC backward-curved centrifugal fan provides structural and financial advantages over traditional AC-driven alternatives.

1. Superior Aerodynamic Efficiency

The backward-curved blade design prevents air separation and turbulence, achieving higher static efficiency. This means the LWBE3G500 industrial exhaust fan can push air through dense filtration networks and long duct configurations without choking or losing performance capacity.

2. Intelligent Speed Regulation

Unlike traditional fixed-speed units, the EC motor integrated into this 400V centrifugal fan accepts external control signals (0-10V or PWM). This allows building management systems and automated air purifiers to dynamically scale airflow based on real-time environmental sensors, cutting energy consumption by up to 30%.

3. Thermal Management & Reliability

Operating at 3955W to 4270W, thermal dissipation is vital. The external rotor layout channels cooling airflow directly across the motor housing, preventing hot spots and ensuring the EC backward-curved centrifugal fan maintains its designated S1 duty cycle over thousands of continuous operational hours.

The versatility of the LWBE3G500 EC backward-curved centrifugal fan makes it indispensable across diverse heavy-duty commercial and industrial sectors:

• Air Purification Systems: High-pressure handling ideal for multi-stage commercial air purifiers and scrubber units.

• Duct & Ventilation Networks: Functions seamlessly as a central duct fan for large-scale building HVAC layouts.

• Industrial Facilities: Provides reliable cooling and air exchange as a heavy-duty industrial exhaust fan in manufacturing plants and workshops.

• Fire Safety & Smoke Extraction: Model -05 is engineered specifically for certified fire smoke extraction systems.

• Data Centers & Tech Hubs: Maintains optimal thermal thresholds in critical server rooms and telecom switch cabinets.

• Refrigeration & Freezing: Perfect for large cold storage air distribution and food processing freezing tunnels.

As a direct manufacturer, Guangdong Lebisen Fan Co., Ltd delivers exceptional commercial value by eliminating middleman markups. We empower global B2B clients, distributors, and engineering contractors with competitive tier pricing (with favorable discounts for volume orders starting at 100 units).

Our engineering teams in overseas hubs like Russia and Poland, combined with our primary manufacturing base, ensure rapid communication, localized technical support, and strict compliance with international standards (CE, ISO, BSCI, RoHS, 3C). Whether you require a customized 400V centrifugal fan with modified flanges, custom wire harnesses, or specialized performance mapping, our OEM/ODM partnership program brings your exact design specifications to market quickly and affordably.

Q1: What is the minimum order quantity (MOQ) for custom OEM/ODM requests on this EC backward-curved centrifugal fan?
A: Standard catalog units start at an MOQ of 100 units for base volume pricing. For custom OEM/ODM modifications regarding voltage, wiring, or mounting dimensions, please consult our engineering sales team for tailored batch requirements.

Q2: Can this 400V centrifugal fan be integrated directly into a building automation system (BAS)?
A: Yes. The onboard EC motor controller supports standard external speed control signals (such as 0-10V or PWM), allowing seamless integration into smart HVAC and building management networks.

Q3: Is the LWBE3G500 series certified for international export?
A: Absolutely. All models carry rigorous international certifications including CE, ISO, BSCI, and RoHS, satisfying import and safety compliances across global markets.