Delivering global-class explosion-proof (Ex) motor systems engineered for volatile, high-hazard environments. By combining Wolong's vast global manufacturing matrix with specialized technical distribution, Shaanxi Nanfang Motor Technology ensures optimal power delivery and regulatory compliance.
Founded on a heritage of design leadership, Shaanxi Nanfang Motor Technology Co., Ltd. serves as the premier authorized global distributor for the Wolong Electric Drive Group. Wolong, established in 1984 and listed on the Shanghai Stock Exchange (SH600580) in 2002, represents a massive milestone in standard-compliant motor manufacturing. Driven by a global brand integration program, Wolong has scaled to 3 global core manufacturing bases, 39 advanced manufacturing factories, and 3 high-level research and development centers.
As industrial setups demand increased reliability and higher efficiency, the coordination between Shaanxi Nanfang Motor Technology and Wolong guarantees quick custom designs, rigid certifications, and seamless shipping protocols. From standard NEMA frame configurations to specialized custom positive-pressure housing topologies, our portfolio is optimized for hazardous operations worldwide.
Validated safe topologies engineered to satisfy European, International, and Eurasian hazardous zone guidelines, covering Flameproof (Ex d), Increased Safety (Ex e), and Non-Sparking (Ex n) configurations.
Meeting standard-compliant IE3, IE4, and advanced IE5 specifications. We offer permanent magnet configurations designed to lower operational costs and optimize load dynamics under VSD integration.
Encompassing low-voltage, medium-voltage, and high-voltage three-phase induction drives alongside custom mechanical frame setups tailored for demanding industrial operations.
To position itself as a world-leading manufacturer of AC motors & drives, Wolong undertook an aggressive global brand integration strategy starting in 2011. The acquisition of 97.94% of the Austrian ATB Group (including the iconic Morley and Laurence Scott brands) equipped Wolong with profound technical and engineering capabilities.
Morley, with over 130 years of underground mining heritage, is a recognized authority in explosion-proof mine conveyor drives. Laurence Scott, famous for supplying high-integrity low-starting-current motors to British nuclear power projects and naval defense vessels, brought extreme engineering methodologies to the Wolong production catalog.
Following this, the renowned Brook Crompton brand joined the group, providing world-class designs for the premium W and 10 series low-voltage asynchronous platforms. Concurrently, Schorch (established in 1882) joined, adding high-power drive units for global petrochemical pipelines.
By incorporating CNE (Nanyang Explosion-Proof Group) in 2015 and acquiring GE's industrial motor business in 2018, Wolong established a solid technical foundation. This allows Shaanxi Nanfang Motor Technology to deliver rugged, certified industrial solutions worldwide.
In parallel, the collaboration with OLI Vibration Motor has secured a leading global market position for industrial vibration applications and Ex vibration monitoring installations.
Today, Shaanxi Nanfang Motor Technology coordinates this extensive global heritage. Whether replacing legacy Brook Crompton units in the UK, deploying high-power Schorch drives in Germany, or installing GE-compliant NEMA standard frames in North America, we utilize Wolong's unified global engineering platform to ensure perfect structural design, matching mounting dimensions, and identical electrical characteristics.
Our combined global engineering resources ensure that every product delivered aligns with local expectations, local grid voltages, and local environmental challenges.
From deep underground coal systems to offshore drilling platforms, our explosion-proof low-voltage motors are tailored for high-risk applications.
Designed for refinery environments with explosive gases and dust. Built with Ex d or Ex de explosion-proof designs to reliably power pumps, compressors, and fans in hazardous areas.
Built with robust cast-iron frames and Class I Group M2 certification to survive dust and dampness in underground mining operations. Commonly deployed on heavy armored conveyor drives.
Specifically built to withstand high torque, extreme vibrations, and heavy moisture. Used on cutterhead drives and ventilation equipment during deep rock drilling.
Each application field presents a unique environment with specific risk factors. Petrochemical plants deal with volatile organic vapors (Class I, Zone 1 / Group IIC), where even a minor electrostatic charge can be hazardous. Accordingly, our low-voltage explosion-proof motors feature anti-static external coatings and precision-machined joints.
In mining environments, safety requirements are even more stringent due to coal dust accumulation. The YBS series mining conveyor motors and YBU series tunnel boring motors are designed to operate reliably under variable overload conditions without exceeding specified surface temperatures (Class I Group I).
Our rotors feature robust squirrel cage geometry. Cast aluminum rotors are produced using centrifugal casting or advanced die-casting techniques, ensuring a single-piece component that integrates rotor bars and end rings.
This construction method ensures excellent starting torque and thermal stability. For larger high-capacity applications, copper bar rotors are used, featuring secured bars and welded end rings. High-speed models also incorporate support rings to maintain rotor balance under extreme dynamic stresses.
Stator windings are insulated using polyester film and glass fiber tape, combined with low-binder mica tapes. This assembly is processed through Vacuum Pressure Impregnation (VPI) to eliminate voids and moisture in the windings.
The VPI process ensures exceptional electrical insulation, high mechanical strength, resistance to moisture, and excellent thermal dissipation, maintaining performance across extended operating cycles.
Motor frames are designed using multi-physics finite element analysis (FEA). These structures are cast from high-tensile cast iron or steel to ensure structural rigidity and resistance to mechanical impact.
The external rib configuration is optimized for thermal dissipation, keeping operating temperatures low and preventing local hot spots.
The low-noise ventilation system consists of an engineered fan cover, an air director, a protective intake screen, and silencer plates. The side-inlet design optimizes air intake and reduces aerodynamic turbulence.
Featuring sound-dampening insulation and an IP22 rating, the fan assembly provides efficient cooling while maintaining low noise levels.
Our products are backed by third-party testing and certifications, meeting international standards for performance and safety in hazardous environments.
Nemko / ATEX
CSA Standard
CE Directives
CCC Ex
SABS Approved
TESTSAFE
Our manufacturing integration ensures cost efficiency, reliable quality control, and structured logistical execution.
Direct integration with steel, copper winding, and casting producers ensures material traceability and helps mitigate cost volatility.
Automated CNC winding machines, dynamic balancing platforms, and vacuum impregnation setups ensure consistent quality control.
Shaanxi Nanfang Motor Tech coordinates shipping via major maritime ports and rail corridors to optimize delivery times.
As industries align with carbon neutrality goals, explosion-proof motors are transitioning to higher efficiency standards and integrating smart features.
The next generation of low-voltage Ex motors will focus on two major areas: higher efficiency and smart diagnostics. Shaanxi Nanfang Motor Tech and Wolong are working to transition explosion-proof lines to IE5 and permanent magnet designs, which improve efficiency under variable load operations.
Additionally, integrating Ex-certified IoT sensors enables real-time monitoring of vibration, temperature, and current trends. This allows operators to perform predictive maintenance, helping to reduce unexpected downtime and maintain plant safety.
Shaanxi Nanfang Motor Tech provides technical support and verification services from selection through installation.
Selecting an explosion-proof motor requires precise alignment of technical parameters, ambient conditions, and safety standards. Our engineering team assists with motor sizing, electrical verification, and mounting compatibility assessments.
We provide full documentation packages, including ATEX, IECEx, and standard certifications, to verify compliance with local regulations and industrial requirements.
Ex d (Flameproof): Designed to contain an internal explosion and prevent flames from escaping the housing into the surrounding atmosphere.
Ex e (Increased Safety): Incorporates design measures to prevent electrical arcs, sparks, or hot surfaces during normal operation.
Ex nA (Non-Sparking): Simplified design for Zone 2 applications, ensuring no sparks occur under normal operation.
VPI seals air pockets within the stator winding structure, preventing moisture entry and reducing mechanical stress. This improves electrical integrity and heat dissipation, which are key for explosion-proof safety.
Variable Speed Drives (VSD) can introduce harmonic heating and reduce cooling fan speed at lower frequencies. We recommend thermistor integration or auxiliary blower cooling to maintain safe surface temperatures under VSD control.
Yes. Wolong's acquisitions of ATB, Brook Crompton, GE, and Schorch allow us to supply motors built to matching dimensions and specifications, facilitating straightforward replacements.
NANFANG
