Explore our heavy-duty industrial electric motors certified for Zone 1, Zone 2, Group IIA, IIB, and IIC explosive atmospheres.
Shaanxi Nanfang Motor Technology Co., Ltd. is the premier authorized global distributor of Wolong Electric Drive Group Co., Ltd. Founded in 1984 and listed on the Shanghai Stock Exchange (SH600580) in 2002, Wolong has grown to become the world's leading manufacturer of industrial electric motors and micro-drives.
Backed by a strong global framework comprising 3 major manufacturing bases, 39 manufacturing factories, and 3 state-of-the-art R&D facilities worldwide, the Wolong brand represents the pinnacle of drive technology, supply chain flexibility, and process quality.
Through our dedicated technical partnership, we integrate Wolong’s industry-leading production capabilities with engineering customization and compliance documentation to meet the precise requirements of major international EPC projects, global distributors, and OEM system integrators.
Learn More About Shaanxi Nanfang Motor
How Wolong combined the heritage of European engineering with Chinese manufacturing efficiency to build a globally dominant motor conglomerate.
Acquired in 2011, Austria's ATB Group is a premier European manufacturer. It includes Morley Motors (130-year legacy in underground coal mining heavy drives) and Laurence Scott (famous for low-starting-current designs and nuclear/naval applications).
A pioneer in motor energy efficiency with over 110 years of expertise. Brook Crompton designs top-tier high-efficiency AC motors, including the "W" and "10" series, engineered specifically for extremely harsh, hazardous, and offshore environments.
Germany's Schorch (established 1882) is a standard-setter in high-capacity electric drive systems for petrochemical and steel sectors. OLI represents the global leader in industrial vibration motor technologies and Ex vibration sensors.
In 2015, China’s largest explosion-proof research and development facility, Nanyang Explosion Protection Group (CNE), officially merged into Wolong. This consolidated the group's domestic dominance in military, nuclear power, and hazardous process motor engineering.
In 2018, Wolong entered into a key partnership with General Electric (GE), acquiring its commercial and industrial motor division. This integration enhanced Wolong’s ability to design, manufacture, and support large custom NEMA-standard machinery for critical process plants globally.
Driving the next wave of industrial safety and energy efficiency through AI-powered optimization and smart sensing.
We are actively transitioning our Ex-proof catalog to IE5 Ultra-Premium and PM (Permanent Magnet) synchronous technology, helping petrochemical and mining clients reduce carbon footprints and auxiliary cooling energy overheads.
Integrating IECEx-certified vibration, temperature, and magnetic flux sensors directly onto the motor frame. Connected to edge-AI modules, they enable predictive fault-finding before critical failures occur in restricted zones.
Our ongoing development includes next-generation thermal isolation barriers and specialized stator insulation, enabling safe continuous motor runs in severe ambient conditions from -60°C to +80°C.
Operating out of highly optimized production centers in China, we leverage advanced manufacturing automation to keep pricing competitive while meeting strict international quality standards. The integration of high-precision CNC machining centers, automated stator winding machines, and robotic assembly processes ensures consistent build quality and reduces lead times.
Our raw material supply chain features strategic reserves of high-grade copper, premium electrical steel (silicon steel), and specialized anti-corrosion metals. This internal stability insulates our production lines from raw material price fluctuations and shipping delays, allowing us to consistently deliver high-volume orders on schedule.
Furthermore, our integrated testing laboratory conducts continuous metallurgical, dynamic balancing, and high-voltage dielectric tests, ensuring that every motor leaving the facility complies with standard test protocols.
Inside look at the heavy-duty metallurgy and advanced engineering that ensures spark-free, flameproof performance.
Our rotors feature robust cast aluminum or high-grade copper bar construction. Aluminum rotors are produced using centrifugal casting or advanced die-casting methods, integrating the rotor bars and end rings into a single piece to prevent internal voids and structural hotspots.
For high-power applications, copper bars are inserted and securely welded to the end rings. We utilize dynamic balancing processes to minimize vibration, ensuring long bearing life and reliable operation at high speeds.
Our stator windings use high-grade copper wire insulated with polyester film and reinforced glass cloth, wrapped in premium mica tape. The entire assembly undergoes a computer-controlled Vacuum Pressure Impregnation (VPI) process.
This process fills air gaps with high-grade varnish, curing the winding into a solid mass. The result is superior dielectric strength, moisture resistance, heat dissipation, and long-term chemical durability in aggressive environments.
Designed using multi-physics structural and fluid thermal analysis, the motor frame is cast from high-tensile gray iron or fabricated steel. The explosion-proof enclosure is engineered to contain internal pressure without deformation, preventing the transmission of sparks or internal explosions to the surrounding atmosphere.
Optimized cooling fins maximize thermal dissipation, keeping the motor's surface temperature well below the auto-ignition threshold of ambient gases.
Our low-noise cooling systems feature an optimized fan cover, internal air guides, protective grilles, and sound-absorbing baffles. The aerodynamic intake path reduces air turbulence, lowering operating noise while maintaining sufficient airflow.
The system is rated IP22 for contact prevention, and the fan blades are manufactured from non-sparking materials, such as antistatic polymers or non-ferrous alloys, to eliminate spark risks.
Configured systems designed to meet safety, reliability, and regulatory requirements in demanding process industries.
From refinery pump drives to offshore gas compressor motors, our machines are designed to withstand corrosive salt spray, hazardous fumes, and volatile gases (Class I, Division 1/2, Zone 1/2, Group IIC).
Heavy-duty, flameproof conveyor motors built to handle dust accumulation, shock loads, and demanding duty cycles. Engineered to meet mine-safety requirements like MSHA and Australian coal mine standards.
Motors with DNV-GL, BV, ABS, and CCS marine type approvals. Features include anti-condensation heaters, marine-grade epoxy coatings, and corrosion-resistant fasteners for offshore vessels and terminal cranes.
We work closely with global engineering procurement departments (EPCs) to provide customized shaft ends, non-standard frame sizes, custom junction box entries, and specialized thermal sensors (RTDs, thermistors). We offer comprehensive Factory Acceptance Testing (FAT) with certified test reports for efficiency, temperature rise, vibration levels, and flamepath tolerances.
Our motors are certified to cross international trade barriers and meet strict safety standards worldwide.
Nemko / ATEX
CSA Standard
CE Compliance
CCC Ex
SABS (South Africa)
TESTSAFE
ISO 9001 Ex Standard: Our manufacturing processes are audited annually to ensure compliance with ISO 9001 and ISO 80079-34 (Explosion Protection Quality Systems).
NEMA & IEEE: For the North American market, our low-voltage NEXP and large motors undergo testing for efficiency, starting currents, and mechanical footprints in compliance with UL and CSA standards.
We hold valid IECEx and ATEX certificates for low, medium, and high-voltage motors, facilitating export to the European Union and other regions utilizing international IEC standards.
TESTSAFE (Australia): Our Testsafe approvals provide access to the Australian coal mining and industrial markets, verifying our electrical equipment meets local safety regulations.
Operating worldwide requires local support. Through our global network, we provide technical consultation and local compliance support to ensure your motor imports meet regional regulatory requirements.
We provide comprehensive engineering packages, including dimensional CAD drawings, wiring schematics, and certificates translated into your local language. Our global warranty system, supported by Wolong’s local service centers in Europe, the Americas, and Asia-Pacific, ensures access to quick maintenance, troubleshooting, and spare parts support, keeping your downtime to a minimum.
Expert answers to common technical and regulatory questions about selecting, importing, and operating hazardous area motors.
Explore our extended range of variable speed, marine duty, and high-performance motors built to order.
Get detailed technical documentation, dimension sheets, custom electrical configurations, and global transport quotes. Partner with an industry-leading manufacturer.
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