Explosion-proof, low voltage, variable frequency, and permanent magnet synchronous motor lines engineered to international standards.
Analyzing market drivers, safety mandates, and the shift toward intelligent air circulation systems.
We deliver specialized electric propulsion and air movement solutions globally.
Engineered solutions targeting efficiency, certified operation, and diversified deployment.
We supply an array of explosion-proof certificates tailored specifically to the regional regulatory demands of your industry and geographical market.
Achieve energy cost optimization with our comprehensive range of IE3, IE4, and cutting-edge IE5 permanent magnet (PM) motor configurations.
A massive, highly integrated product line covering standard and custom heavy-duty blower applications across extreme thermal and hazard profiles.
Optimized structural and electrical components that guarantee low vibration, quiet running, and maximum uptime.
The rotor features an advanced squirrel cage layout, using centrifugal cast aluminum or precision die-casting techniques. Molten pure aluminum is directly cast into the slots of the laminated rotor core. This integrates the rotor bars and end rings into a solid, mechanically robust, single-piece component.
For heavy-duty, large-capacity industrial AC blower motors, we employ copper bar rotors fabricated with high-strength welding methods. Dynamic balancing is executed to grades G1.0 or G2.5, preventing bearing wear and excessive vibration under high velocity air-moving profiles.
Squirrel cage aluminum / copper rotor core
Stator coils are wrapped in layers of polyester film combined with high-mica content glass-cloth tapes. The fully wound stator undergoes a thorough Vacuum Pressure Impregnation (VPI) cycle, rendering the core and windings completely impervious to environmental pollutants, humidity, and corrosive chemical vapors.
This advanced insulation process provides exceptional dielectric strength, superior mechanical resistance under cyclic loads, and high thermal stability (Class F rating with Class B temperature rise limit).
Precision-wound stator during VPI treatment
Leveraging a multi-physics digital platform, structural and fluid thermal simulations optimize the design of the cast-iron (or fabricated steel) frames. High-strength materials provide immense structural rigidity, allowing the blower motor to handle shock loads and resist external piping stresses without shaft misalignment.
Optimized cooling fins maximize air velocity across the motor frame, accelerating heat dissipation and ensuring low frame temperatures even during continuous duty (S1) operation.
Cast iron motor frame with optimized cooling fins
Our fan cover system includes an aerodynamically contoured hood, directional air guide cylinder, protective debris screens, and integrated silencer linings. The layout minimizes turbulent flow, reducing power loss and structural noise.
The side air inlet configuration prevents ingress from obstacles behind the motor. The enclosure is rated IP22 (or higher customized configurations), preventing direct contact with rotating fan blades while optimizing cooling efficiency.
Acoustically insulated fan cover casing
Why global engineering teams choose Chinese factory-direct sourcing for critical AC blower motors.
Leveraging a centuries-old engineering legacy through strategic global acquisitions.
Acquired in 2011, ATB is a leading European motor manufacturer. This brand includes Morley (UK), famous for coal mine underground systems, and Laurence Scott, known for low starting-current applications.
A premier brand in the electric motor sector with over a century of experience in motor design. Known for energy-efficient products like the "W" series, built to withstand harsh, hazardous industrial environments.
Established in 1882, Schorch sets high standards for heavy-duty motors used in oil and gas, petrochemicals, power generation, water treatment, tunnels, and marine systems.
The commercial and industrial motor division of General Electric joined the Wolong Group in 2018. This brings decades of expertise in heavy industries like mining, steel processing, and chemical refining.
Nanyang Explosion-proof Group (CNE) is China's largest scientific research and production base for explosion-proof motors. In partnership with OLI, the global leader in industrial vibration motor markets, we offer reliable equipment for dangerous environments worldwide.
Adhering to international quality standards for frictionless global trade and deployment.
ISO 9001 Standard: Our manufacturing processes adhere to ISO 9001, providing a foundation for international supply chain compliance. This structured framework ensures consistency in design, raw material tracking, assembly, and testing.
NEMA Mechanical Standards: For North American markets, our designs are tested to meet NEMA requirements, covering start-up torque, insulation resistance, duty cycle thermal limits, and standardized frame sizes. Our products carry UL and CSA approvals.
ATEX & IECEx Certification: Critical for motors operating in hazardous atmospheres, our explosion-proof motors undergo rigorous flamepath testing, casing overpressure verification, and hot-spot assessments to ensure safety in Zone 1, Zone 2, Zone 21, and Zone 22 locations.
TESTSAFE standard: Approved by Australia's prominent coal product certification body, this opens streamlined export channels to the Australian mining sector, ensuring our motors meet local underground mining safety regulations.
Designed for optimal performance in diverse, high-demand industrial and commercial environments.
In oil and gas refineries, toxic and flammable vapors are constantly processed. Our explosion-proof AC blower motors power continuous exhaust fans, ensuring safe air exchanges in processing areas. VPI-treated windings and marine-grade protective coatings protect internal components from corrosive gases.
Underground mines require constant fresh air to dilute methane and particulate dust. Our flameproof AC motors drive large main fan ventilation systems. With robust cast-iron frames and Class H insulation materials, they operate reliably under severe vibration and dust-heavy conditions.
In commercial buildings, airports, and industrial complexes, air handling units require continuous motor operation. Our IE3 and IE4 efficiency motors provide cost-effective operation. Optimized for variable speed operations, they integrate smoothly into building automation systems.
The industrial air handling industry is evolving quickly, driven by digitalization and energy conservation goals. The traditional induction motor is increasingly being replaced by Permanent Magnet Synchronous Motors (PMSM). PMSMs offer higher efficiency profiles, especially when operating at partial loads, helping companies reduce their carbon footprint.
Additionally, the integration of IoT Smart Diagnostics is changing maintenance routines. Built-in vibration sensors and temperature monitors detect early signs of bearing wear or stator overheating, transmitting real-time diagnostics to operations centers. This predictive maintenance approach helps prevent unexpected system downtime.
For procurement officers and HVAC engineers, selecting a supplier involves assessing total cost of ownership (TCO) rather than just initial purchase price. Key selection criteria include:
Expert engineering responses to common inquiries regarding AC blower motors and global regulations.
CE Certification indicates that the motor complies with all applicable European Union directives, including the Low Voltage Directive (2014/35/EU), Electromagnetic Compatibility Directive (2014/30/EU), and, where applicable, the ATEX Directive (2014/34/EU) or Machinery Directive. It is a mandatory requirement for placing industrial electric machinery on the European Economic Area market and serves as a global benchmark for safety and quality.
Variable Frequency Drives (VFDs) can introduce high-frequency shaft voltages, leading to electrical discharge machining (EDM) in standard bearings. Wolong addresses this issue by using insulated non-drive end (NDE) bearings, hybrid ceramic bearings, or internal shaft grounding rings. These components safely divert shaft currents, protecting the bearings and extending their service life.
The primary difference is geographic and regulatory. ATEX is a mandatory legislative directive within the European Union, covering both electrical and non-electrical equipment. IECEx is an international, voluntary certification scheme aimed at harmonizing safety standards for electrical equipment in explosive atmospheres globally. Wolong's explosion-proof motors are certified to both ATEX and IECEx standards, facilitating compliance in multiple markets.
Yes. We offer customization for shaft diameters, shaft extensions, mounting flanges, and terminal box positions. This allows our motors to serve as direct replacements for older equipment from other manufacturers, reducing installation costs and downtime during plant upgrades.
VPI replaces the air inside the winding slots with a solid, bubble-free insulating resin. This process improves the motor's mechanical strength, moisture resistance, heat dissipation, and dielectric performance. It protects the stator from damage in environments prone to high vibration, high humidity, or chemical vapors.
From heavy duty coal mine flameproof models to high-voltage, low-starting-current synchronous options.
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