Engineered to deliver exceptional performance, high energy efficiency, and reliable containment in critical hazardous areas.
Shaanxi Nanfang Motor Technology Co., Ltd. is the authorized global distributor of Wolong Electric Drive Group Co., Ltd. (founded in 1984, listed in 2002 under stock code SH600580). Over nearly four decades of rapid industrial development, Wolong has established a global footprint that boasts 3 manufacturing bases, 39 manufacturing factories, and 3 R&D centers across Europe, Asia, and North America.
Focusing continuously on the research, manufacture, and distribution of industrial motors and intelligent control systems, Wolong integrates legendary century-old global motor brands. By utilizing leading-edge motor design technologies and optimized production pathways, Wolong offers high-specification industrial drive packages to heavy industries worldwide.
How Modern Explosion-Proof Driving Technology Meets High-Risk Operations Worldwide
In high-risk heavy industries, such as petrochemical refinement, deep coal mining, grain storage processing, and offshore drilling platforms, flammable gases, vapors, and airborne dust create potentially explosive atmospheres. Safety regulations require the deployment of flameproof motors—designated by the Exd classification. The basic mechanical principle of an Exd motor is its capability to withstand an internal explosion of a specified gas mixture without transmitting the explosion to the surrounding hazardous external atmosphere. The joints and seals of the housing (flamepaths) act as cooling channels, letting escaping hot gases cool down below the ignition temperature before exiting the enclosure.
Today, the demand for Exd motors is driven by a push toward higher energy efficiency (IE4 and IE5 standards), integration with variable frequency control systems (VSD), and smarter performance diagnostics. Because these systems run continuously under harsh environmental conditions, selecting motors with high structural integrity, optimized thermodynamic paths, and reliable international safety certificates is essential for operational safety and risk mitigation.
We provide a comprehensive range of Ex certificates, including Europe's ATEX Directive (2014/34/EU), Global IECEx standards, and Russia/Eurasia's EAC (CU-TR) certifications, matching the specific regulatory criteria of your local market.
Designed with high-efficiency stator laminations and advanced rotor designs, our motors are available in IE3, IE4, and ultra-high-efficiency IE5 levels, with options for permanent magnet technology (PMSM).
Our solutions cover low-voltage, medium-voltage, and high-voltage AC motors. This variety serves multiple machinery types, including underground coal mining conveyors, high-speed tunnel borers, and offshore gas compressors.
Consolidating centuries of premium motor engineering expertise under one umbrella.
Wolong has established advanced motor and drive control R&D centers in China, Europe, and Japan. Together with its central research institute in Shanghai, the group focuses on core technologies like high-power-density motors, noise reduction aerodynamics, and permanent magnet drive controls.
Through strategic acquisitions, Wolong integrates renowned domestic names like Nanyang Explosion-Proof (CNE) with centennial international brands, including Brook Crompton, Morley, Laurence Scott, Schorch, and ATB. This portfolio delivers high performance across global oil, gas, and heavy mining projects.
Wolong leads the market in explosion-proof performance, structural reliability, and mechanical durability. Our Exd and Exe product lines are widely deployed in challenging gas and dust hazards worldwide, backed by certifications from prestigious global test agencies (ATEX, IECEx, CU-TR, UL, CSA, and TestSafe).
Building a global footprint through technical integration and acquisitions.
Leveraging strong manufacturing assets, Wolong initiated an international growth strategy to expand its portfolio of industrial AC motors and variable-speed drives worldwide.
In 2011, Wolong acquired a 97.94% stake in the Austrian ATB Group, a major European motor manufacturer. This acquisition integrated ATB's sub-brands, including Morley (which brings nearly 130 years of underground coal mining expertise) and Laurence Scott (known for low starting current designs and nuclear/naval installations). These additions expanded Wolong's capacity to deliver specialized, high-performance equipment to heavy industrial markets globally.
Subsequently, Brook Crompton Motors joined the Wolong Group. Brook Crompton is recognized for pioneering energy-efficient motor designs, offering high-efficiency options (W and 10 series) for harsh environments, along with integrated adjustable speed drive packages.
In 2011, Germany's Schorch Electric Motor was integrated, bringing its high-quality drive systems built since 1882 to projects in oil, gas, chemical processing, water treatment, and shipbuilding. In 2015, Nanyang Explosion-Proof Group Co., Ltd. (CNE), a leading Chinese explosion-proof motor research and manufacturing base, joined Wolong. This partnership expanded the group's range of low-voltage and high-voltage flameproof asynchronous machines.
In 2018, General Electric (GE)'s commercial and industrial motor division partnered with Wolong. GE's decades of manufacturing experience in heavy industrial motors helped strengthen Wolong's global product support systems.
Global certifications enable Wolong drive systems to integrate smoothly with diverse international regulatory requirements.
Nemko/ATEX
CSA
CE
CC
SABS
TESTSAFE
Wolong aligns with major global standards, enabling the export of machinery across multiple international markets:
A deep look into the structural elements that enable reliability in explosive atmospheres.
Our rotors utilize a squirrel-cage design. Cast aluminum rotors are produced using centrifugal or die-casting techniques, flowing molten aluminum into the rotor core slots to form integrated bars and end rings. This design supports rotor reliability and consistent starting torque. For higher power ratings, copper bar rotors are used, utilizing welded end-ring construction. High-speed models also incorporate safety rings to manage centrifugal stresses during operation.
Winding coils are constructed using polyester film and glass-reinforced mica tape (low or medium powder options). Stators undergo Vacuum Pressure Impregnation (VPI) with high-grade resins, producing cured, moisture-resistant windings. This insulation system provides mechanical strength, thermal stability, and electrical reliability under cycling loads.
The motor enclosure is designed using digital simulations for structural load and thermal performance. Fabricated from high-strength cast iron or fabricated steel, the frame includes cooling fins configured for heat dissipation. The structure is built to handle mechanical impacts while providing vibration isolation to protect internal components.
The cooling system includes an aerodynamic fan shroud, air guide cylinders, protective screens, and dampening plates. The side-entry air inlet design optimizes airflow pathways around obstacles, lowering pressure drops and noise generation. Sound-absorbing liners further reduce acoustic output, while the IP22-rated guard prevents accidental contact with the rotating fan blades.
Wolong drive technologies operate across high-demand processing and extraction industries globally.
Our explosion-proof motors serve critical driving functions across hazardous process industries. Wolong's global presence—spanning 39 factories and 4 dedicated R&D centers in locations like China, Vietnam, the UK, Germany, Austria, Italy, Mexico, and India—helps ensure we can supply and service these systems globally.
Driving extraction pumps, high-pressure pipeline compressors, and refining process fans in offshore and onshore facilities. Our motors are built to resist corrosive environments and contain gas hazards (Group IIB/IIC).
Powering heavy underground equipment like armored face conveyors, shearers, and ventilation fans. Built to comply with Exd I mining standards, these units feature robust enclosures to withstand coal dust and methane environments.
Driving cutting heads and conveyor lines on Tunnel Boring Machines (TBMs) with the YBU/YBUS/YBUD series. Designed to deliver high starting torque and run reliably in high-humidity, confined spaces.
Common questions regarding Exd motor selection, certification, and maintenance in hazardous environments.
Engineered to deliver exceptional performance, high energy efficiency, and reliable containment in critical hazardous areas.
NANFANG