Explore our highly integrated explosion-proof synchronous, high-voltage induction, and high-efficiency permanent magnet solutions.
The international chemical, refining, mining, and energy sectors are undergoing an unprecedented shift toward maximum reliability and safety regulation. Explosion-proof (Ex) motors represent the critical core of hazardous zone drive systems.
For international supply chains, operating across borders requires meeting stringent regional requirements. Integrating ATEX (Europe), IECEx (Global), and NEMA/UL/CSA (North America) eliminates the friction of multiple safety certifications, driving down project execution costs for EPCs and engineering integrators worldwide.
Modern industrial standards no longer accept simple safety compliance at the expense of efficiency. Advanced premium efficiency standards (IE4 and IE5) are fast becoming mandatory in critical heavy industries, requiring the deployment of permanent magnet synchronous motors (PMSM) alongside traditional induction systems.
The rise of automated offshore drilling platforms, automated mine shafts, and modular chemical facilities has dramatically expanded the need for high-performance variable frequency drives (VFDs) paired with flameproof and increased-safety motors to maintain steady operational output under extreme temperatures.
SEO Search Intent Insight: Design engineering consultants and procurement leads look for "IECEx certified manufacturers" who possess deep technological integration rather than simple resellers. Working directly with an OEM factory that supports full customization—from structural steel frames to specific winding insulation profiles—dramatically reduces the Total Cost of Ownership (TCO) and accelerates safety validation pipelines.
Shaanxi Nanfang Motor Technology Co., Ltd. stands as the authorized distributor of Wolong. Founded in 1984, Wolong Electric Drive Group Co., Ltd. was successfully listed on the Shanghai Stock Exchange in 2002 (code SH600580). Over nearly four decades of rapid development and strategic global scaling, Wolong has established 3 key manufacturing bases, 39 advanced factories, and 3 dedicated R&D centers across the globe. Wolong focuses comprehensively on the manufacture of electric motors and electronic drive control systems, dedicated to delivering a global brand strategy that positions it at the leading edge of technology, production capacity, and distribution network authority.
By executing targeted global acquisitions of century-old electric drive giants, Wolong has united the world's most advanced motor intellectual properties under a single operational ecosystem. This integration ensures that every product matches or exceeds traditional western industrial specifications:
Acquired in 2011, ATB is one of Europe's top three motor manufacturers. Within ATB, Morley holds a 130-year legacy in heavy-duty underground coal mining drives. This synergy provides highly specialized mining motor technology for global markets prioritizing robustness and safety.
Laurence Scott is the pioneer behind the low-starting-current motors used extensively in nuclear power generation and UK naval vessels. This heritage yields unmatched expertise in electrical transient management and reliability under harsh marine conditions.
A century of design mastery, Brook Crompton is famous for high-efficiency low-voltage motors. Schorch, founded in 1882, is the standard-bearer for large industrial explosion-proof motors deployed in major oil, gas, and power projects across Europe.
In addition to these European powerhouses, Wolong partnered with OLI Vibration Motor in 1999, establishing a globally dominant position in mechanical vibration drives. In 2015, China's largest explosion-proof research and manufacturing base—Nanyang Explosion Protection Group (CNE)—joined the Wolong Group, solidifying its manufacturing capacity. In 2018, the strategic integration of General Electric (GE) Industrial Motor Division occurred, further supporting Wolong with commercial and industrial motor technology for heavy processing industries, oil and gas, cement, and water treatment operations.
Leveraging deep R&D footprints in China, Europe, and Japan, our technology addresses the core requirements of severe duty engineering:
We provide full explosion-proof protection configurations (Ex d, Ex db, Ex e, Ex eb, Ex n, Ex ec) complying with IEC/EN 60079 standards. This ensures frictionless field commission validation for globally dispersed projects.
With efficiency options spanning IE3, IE4, and advanced IE5 standards, our permanent magnet synchronous motors (PMSM) drastically lower thermal losses, helping plant operators meet national carbon emission standards.
Our centralized Shanghai Research Institute coordinates technological developments across Europe and Japan. This keeps our electrical designs at the forefront of slot geometry, structural noise suppression, and fluid-dynamic cooling technology.
A closer look at the advanced design, simulation platforms, and material science that go into our motors.
Our squirrel cage design utilizes high-purity aluminum produced via centrifugal casting or high-pressure die-casting. This creates a solid rotor core that integrates the bars and end rings, preventing internal air pockets and ensuring high mechanical reliability. For high-power high-voltage motors, we use copper bar rotors with TIG welding on the end rings and high-speed retaining rings, providing reliable operation during frequent start-up cycles.
Our stator coils use high-grade polyester-film glass-cloth backing combined with rich mica tape. After insertion into the stator laminations, the core undergoes a proprietary Vacuum Pressure Impregnation (VPI) cycle with solventless epoxy resin. This process eliminates microscopic voids, providing excellent dielectric strength, high moisture resistance, and reliable thermal stability to prevent corona discharge under VFD operation.
Developed using fluid-thermal and structural multi-physics finite element analysis (FEA), our cast iron and steel frames feature high structural rigidity and large thermal dissipation fins. This design helps minimize vibration levels, provides dynamic stability under high load shocks, and controls motor temperature rises, preventing flame propagation routes.
Our system integrates a dynamic fan cover body, air guide cylinder, protective grill window, and sound-absorbing baffles. The side-entry air intake minimizes turbulence, which reduces noise and helps prevent dust buildup. With an IP22 design, the hood ensures high cooling air volume while keeping operations safe and quiet.
Our explosion-proof motors are designed to operate reliably in harsh, demanding industrial environments around the globe.
Specifically matched for coal shearers, scraper conveyors, and main ventilating shafts. Using our specialized Morley mine motor technology, these explosion-proof machines withstand extreme physical impacts, high dust loads, and explosive methane atmospheres without spark leakage.
Driving large-scale compressors, process pumps, and cooling tower fans. Our explosion-proof motors are engineered for Zone 1 and Zone 2 environments. Features like anti-corrosive painting coatings, seawater-resistant shaft seals, and chemical-resistant insulation help protect the systems from ambient corrosive gases.
Suitable for deck machinery, LNG tankers, and dynamic positioning pumps. Using Laurence Scott engineering, these units offer low starting currents, making them highly compatible with offshore generator networks.
Industrial requirements continue to demand higher levels of energy efficiency, digital integration, and functional safety.
We are actively integrating vibration sensors and temperature probes directly into the motor housing. Connecting these to cloud platforms enables real-time predictive maintenance, helping plant operators identify bearing fatigue or winding temperature spikes before they lead to downtime.
Our R&D teams are researching magnetic materials and slot patterns to achieve IE6 efficiency levels. Utilizing line-start permanent magnet technology allows these motors to run directly from the grid while maintaining excellent energy efficiency.
As hydrogen energy infrastructure expands, safety systems must adapt to its low ignition energy. We are optimizing our flameproof paths (Group IIC gas environments) and seal designs to ensure safety in hydrogen generation, compression, and storage facilities.
We hold a wide range of international product certifications, enabling seamless deployment across diverse global markets.
Nemko/Atex
CSA
CE
CC
SABS
TESTSAFE
By complying with major global standards, we can support international projects without requiring costly and time-consuming local re-testing:
We address common technical and regulatory questions concerning explosion-proof motors in heavy industry.
Browse our low-voltage high-efficiency, variable frequency, and coal-shearer cutting motors.
Request a technical consultation today. Our engineering team can help review your motor specifications, duty cycles, and certification requirements for your next project.
NANFANG
