Direct supply from China's largest manufacturing hubs with IECEx, ATEX, and CE Certifications.
Shaanxi Nanfang Motor Technology Co., Ltd serves as the official authorized distributor of Wolong. Founded in 1984 and successfully listed in 2002 (code SH600580), Wolong Electric Drive Group Co., Ltd. has established itself as an unparalleled leader in global electric motor and drive control systems. Backed by over three decades of dynamic industrial development, Wolong operates 3 global manufacturing bases, 39 advanced factories, and 3 state-of-the-art R&D centers globally.
Our mission is to bridge Chinese supply chain efficiency with the strict technical specifications of global industrial buyers. Through deep strategic investments and structural integration of world-class European and American legacy motor manufacturers, Wolong provides cutting-edge explosion-proof motors characterized by unmatched performance, complete regulatory compliance, and rugged durability.
Direct factory-backed customization, comprehensive global standard certificates, and specialized localized project services support for critical industries.
Engineering safe rotation for hazardous environments. We integrate absolute safety with optimized electric efficiency to protect human lives and capital assets.
Different kinds of Ex certificates are available for your local industry and regional market. Compliant with EN/IEC 60079 series standards for Zone 1, Zone 2, Zone 21, and Zone 22 applications.
Providing motors in compliance with IE3, IE4, and IE5 energy targets. Permanent Magnet Synchronous Motors (PMSM) are available to significantly lower operating carbon footprints and TCO.
Rich and versatile product matrix covering low, medium, and high voltage three-phase AC motors engineered specifically for fan, pump, compressor, and conveyor drives.
Combining century-old Western motor brands with China's unparalleled industrial scale, engineering precision, and supply chain strength.
Wolong has established advanced motor and drive control R&D centers in China, Europe, and Japan, complemented by a Central Research Institute in Shanghai. This structural network allows us to lead in multi-physics simulations, electromagnetic optimization, and advanced rotor dynamics.
Wolong consolidates domestic leading brands such as Nanyang Explosion Protection (CNE) with globally renowned, century-old legacy brands, including ATB, Brook Crompton, Morley, Laurence Scott, and Schorch, establishing a commanding presence in global heavy industries.
Widely utilized in critical risk environments such as offshore drilling, chemical processing, coal mining, and gas transport. Our products undergo rigorous testing to comply with international safety regulations, including ATEX, IECEx, CU-TR (EAC), and CSA.
Accumulated with abundant assets and brilliant experiences in manufacturing, WOLONG reached for global integrations. To become a premier manufacturer of AC motors & drives worldwide, WOLONG strategically acquired the following overseas groups:
In 2011, Wolong acquired 97.94% of the Austrian ATB Group (including ATB, Morley, and Laurence Scott). Morley motor, with its 130-year mining heritage, is synonymous with heavy-duty coal-mining reliability. Laurence Scott, a pioneer in low-starting-current generators, has supplied safety-critical motors for British naval vessels and nuclear power plants.
Schorch, established in Germany in 1882, joined Wolong in 2011, bringing unmatched expertise in ultra-heavy-duty and high-voltage motors for the oil and gas sector.
In 2015, Wolong integrated Nanyang Explosion Protection Group (CNE), China's largest scientific research and production base for explosion-proof motors.
In 2018, General Electric (GE) Commercial and Industrial Motor Division entered a strategic joint venture with Wolong, accelerating technological transfer in highly demanding industrial markets.
Brook Crompton Motors has over a century of experience in motor design and energy-efficiency innovation. Driven by technology, it developed the premium Brook Crompton 'W' and '10' series low and high-voltage AC motors designed for harsh, hazardous conditions.
Dating back to 1999, Wolong partnered with OLI, the global leader in industrial vibration technology (MVE vibration motors and Ex vibration sensors), capturing the largest market share in industrial vibration and material handling systems worldwide.
As China's primary supplier for the military, petrochemical, and nuclear power sectors, CNE's integration with Wolong established a comprehensive technical baseline for flameproof, positive-pressure, and dust-ignition-proof motors.
Where safety meets performance: we engineer tailored motor systems for complex industrial environments worldwide.
Designed for oil refineries, offshore platforms, and natural gas pipelines. These environments require Class I Division 1 & Zone 1 flameproof enclosures (Ex d / Ex de) to contain internal combustion and prevent explosive gas mixtures (such as ethylene and hydrogen) from igniting.
Methane gas and volatile coal dust pose constant safety risks in coal mines. Our heavy-duty mining motors (such as the YBS and YBF series) are engineered with cast-iron enclosures, integrated temperature sensors, and reinforced cable entry systems to ensure continuous operation for underground conveyors and ventilation systems.
Volatile organic dust clouds can ignite from spark-emitting standard electric motors. Our dust-ignition-proof motors (such as the YFB3 series) feature dust-tight enclosures (Ex t / IP65 or IP66) to prevent fine particles from entering the motor enclosure, protecting grain silos and milling operations.
Driving the transition to smart, safe, and highly efficient electric drive systems.
Transitioning the traditional line-start induction motor catalog to PM Synchronous and Synchronous Reluctance technologies (SynRM), significantly reducing thermal loss and power consumption.
Integrating vibration sensors and thermal monitoring systems directly into explosion-proof junction boxes to enable real-time cloud data logging and predictive maintenance.
Developing class H corona-resistant insulation systems utilizing advanced VPI technologies to ensure high reliability when powered by high-frequency Variable Speed Drives (VSD).
Utilizing advanced corrosion-resistant paint coatings, stainless steel shafts, and specialized seals to extend the service life of motors operated in offshore marine environments.
A detailed overview of our motor structures, built using robust materials and design principles to ensure reliable operation in hazardous environments.
The rotor features a robust squirrel cage design, with cast aluminum rotors being widely utilized. These rotors are produced using centrifugal aluminum casting or die-casting techniques, where molten pure aluminum is poured into the slots of the rotor core, resulting in a single-piece construction that integrates the rotor bars and end rings.
The structural integrity and manufacturing process of cast aluminum rotors guarantee reliability and provide outstanding torque properties. For larger capacity motors, copper bar rotors are employed, utilizing reliable bar securing and end ring welding procedures. Additionally, the protective ring design of high-speed motors ensures the reliable operation of the copper bar rotor under high rotational stress.
The stator coil is crafted from polyester film and reinforced with glass cloth, utilizing low-powder mica tape with a high mica content or medium-powdered mica tape with an abundance of mica. Following the VPI (Vacuum Pressure Impregnation) process, a pristine white coil emerges from the production line.
After the billet is extracted from the wire, it proceeds through the VPI process to transform into a finished, solid unit. The winding and insulation systems are meticulously engineered to provide exceptional electrical performance, high mechanical strength, resistance to environmental moisture, and long-term thermal stability.
The motor frame design is optimized using a fully digital platform for structural and fluid multi-physics field simulations. This simulation platform retains the original patent's structure and design, utilizing mature, high-strength cast iron (or steel as an alternative) to ensure maximum mechanical safety.
The frame features exceptional structural redundancy, outstanding heat dissipation properties, and ample inherent frequency isolation margins to prevent resonant vibration. It is engineered to endure significant mechanical shocks, maintain low vibration levels, and ensure a lower temperature increase in the motor during continuous full-load operation.
The low-noise fan cover system comprises a fan cover body, an air guide cylinder, a protective window, and a silencer plate. Its compact structure and lightweight design facilitate vibration reduction. The air inlet is situated on the side, optimizing the clearance behind the motor, minimizing adverse effects on ventilation, and reducing noise caused by energy loss during propagation path changes.
The system also incorporates sound-absorbing materials that absorb high-frequency noise, lowering the overall motor noise. Additionally, the fan cover is rated IP22, ensuring that personnel cannot accidentally come into contact with the rotating fan blades.
Adhering to strict international standards. Our electric motors hold certifications required to access major markets worldwide.
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
Wolong adopts a comprehensive marketing and technical design strategy across the electric motor supply chain, acquiring global product certifications to support international project compliance:
Leveraging integrated industrial clusters to deliver cost-effective, high-quality motor systems on tight project schedules.
China factories operate close to major steel mills, high-purity copper suppliers, and rare-earth mining hubs. This proximity ensures a stable supply of silicon steel, winding copper, and NdFeB magnets, protecting production schedules from raw material shortages.
Our production bases in Nanyang, Henan, and Shangyu, Zhejiang, utilize CNC machining centers, automated VPI chambers, and automated dynamic balancing setups. These localized clusters shorten turnaround times for custom shaft designs and special mounting frames.
With proximity to major shipping ports like Shanghai, Ningbo, and Qingdao, we facilitate direct container shipping to global industrial hubs. We offer flexible Incoterms (FOB, CIF, DDP) and prepare custom documentation to streamline local customs clearance.
Providing technical answers to common queries from procurement teams and plant engineers.
Flameproof (Ex d): The motor enclosure is designed to withstand an internal explosion of a flammable gas-air mixture without transmitting the flame to the surrounding atmosphere. It prevents hot gases from igniting gases outside the motor housing.
Increased Safety (Ex e): Focuses on preventing the occurrence of sparks, arcs, or hot surfaces during normal operation or under specified overload conditions. It utilizes safety margins in insulation, electrical clearances, and mechanical construction, but the enclosure is not designed to contain an internal explosion.
Yes. Since Wolong owns century-old European legacy brands—such as ATB, Schorch, Brook Crompton, Laurence Scott, and Morley—our Chinese factories build motors on the same engineering platforms and patents. We offer standard IEC frame sizes and custom NEMA shaft configurations, ensuring direct mechanical interchangeability and electrical compatibility with existing equipment.
Every motor undergoes routine testing before leaving the factory, including winding resistance, insulation resistance, no-load current/loss, and high-potential dielectric testing. High-voltage units undergo type testing (such as temperature-rise tests, dynamic balance testing, vibration signature mapping, and sound level checks) in our certified test bays, which are witnessed by third-party agencies (e.g., DNV, SGS, Nemko) upon request.
We provide comprehensive OEM customization including: custom shaft extensions (tapered, double-extension), non-standard voltage configurations (e.g., 660V, 1140V, 3.3kV, 6.6kV, 11kV), variable frequency optimization (VFD duty), thermistors/RTDs for winding and bearings, space heaters, and customized mounting frames (foot, flange, or face mountings).
Explore our high-voltage and specialized flameproof models engineered for demanding industrial tasks.
NANFANG
