Discover our premium range of low-voltage and high-voltage three-phase asynchronous industrial motors engineered for hazardous areas.
Shaanxi Nanfang Motor Technology Co., Ltd serves as the premier authorized distributor of Wolong (Wolong Electric Drive Group Co., Ltd). Founded in 1984 and successfully listed on the Shanghai Stock Exchange in 2002 (Stock Code: SH600580), Wolong has grown to become an undisputed titan in the international electric drive industry.
Backed by over 30 years of continuous technological progression, Wolong manages a vast global footprint including 3 primary manufacturing bases, 39 state-of-the-art factories, and 3 localized R&D centers across Europe, Asia, and the Americas. The group focuses continuously on the creation of high-end industrial motors and control systems. Through a meticulously planned global brand strategy, Wolong delivers unparalleled technological advantages, engineering craftsmanship, and distribution infrastructure directly to demanding sectors globally.
Our solutions target hazardous and extreme environments that require the utmost mechanical safety. Whether dealing with hydrocarbon gas, volatile dust, or harsh subterranean mines, our electric drives ensure uninterrupted operations under the most restrictive directives, including the European Union's CE marking, ATEX, and IECEx frameworks.
By integrating century-old motor expertise with modern digital multi-physics structural simulation, we deliver motors that exceed regulatory baselines, offering improved heat transfer, vibration suppression, and efficiency.
The convergence of green transition, stringent safety directives, and digital twin technology is shaping the future of explosion-proof industrial drives.
Global procurement teams prioritize equipment that satisfies multi-jurisdictional frameworks. In addition to basic CE markings, plants require compliance with ATEX and IECEx. Combined certification reduces import frictions and ensures identical safety parameters across global operating plants.
Energy utilization is critical for heavy operations. Standard IE3 efficiency motors are increasingly replaced by IE4 and IE5 (ultra-premium efficiency) categories. Our low-voltage YE5 and YBX5 explosion-proof motors lower total cost of ownership (TCO) while complying with emission laws.
Unexpected downtime in a petrochemical plant or refinery can cost millions daily. Integrating vibration and thermal sensors into explosion-proof motor frames allows real-time diagnostics, enabling plant operators to address mechanical issues prior to failures.
How Wolong brought together the world's most trusted motor manufacturers to build a premier global drive group.
To establish a leading position in global AC motor and drive manufacturing, Wolong pursued strategic international acquisitions. In 2011, Wolong acquired a 97.94% controlling stake in the Austrian ATB Group, a major European motor manufacturer.
This acquisition brought prestigious sub-brands with deep historical roots into the group:
Brook Crompton Motors joined the Wolong group, contributing over a century of expertise in design and efficiency innovation. Brook Crompton leads in energy-efficient motors, offering comprehensive low, medium, and high-voltage AC motor lines, including the premium "W" and "10" series designed for harsh settings.
Established in 1882, Schorch Electric Motor was integrated into Wolong in 2011. Schorch is recognized for setting standards in high-quality drive systems. Schorch collaborates globally in petrochemicals, power generation, wastewater, shipbuilding, and metallurgical processing.
In 1999, Wolong established a partnership with OLI, a major brand in global vibration motors (MVE) and Ex vibration sensors. In 2015, China's largest explosion-proof motor research and production base, Wolong Electric Nanyang Explosion-proof Group Co., Ltd. (CNE), joined the Wolong Group. CNE's explosion-proof high-voltage and low-voltage asynchronous motors serve critical domestic and international markets in oil, coal, chemical, and nuclear power.
In 2018, General Electric (GE) commercial and industrial motor division partnered with Wolong. GE's experience in heavy industries like mining, petrochemicals, and metal processing supports Wolong's global product strategy.
Under the hood of a Wolong Nanyang ATB explosion-proof motor: designed for extreme safety and structural reliability.
Our rotors use a squirrel-cage design, with cast aluminum rotors widely utilized for general duty applications. These are produced using centrifugal casting or high-pressure die-casting, where molten pure aluminum is poured into the rotor core slots. This yields a single-piece construction integrating the rotor bars and end rings, ensuring mechanical integrity and starting torque properties.
For high-capacity or heavy-start motors, we employ copper bar rotors featuring welded copper bars and end rings. A protective retaining ring design on high-speed configurations prevents centrifugal deformation, providing stability under variable frequency operations.
The stator windings are insulated using polyester film combined with high-grade glass cloth, wrapped with medium-to-high content mica tapes. The entire assembly undergoes a Vacuum Pressure Impregnation (VPI) process.
This process eliminates air pockets within the slots, resulting in a solid, moisture-resistant winding. The insulation system is engineered for thermal stability, mechanical strength under electromagnetic stress, and resistance to environmental moisture, meeting Class F or Class H limits.
Designed using digital structural and fluid multi-physics simulation platforms, the frame is cast from high-strength gray cast iron or welded steel plates. The design features structural redundancy and cooling fin configurations to optimize heat dissipation.
The frame is built to withstand internal explosion pressures without deformation, preventing gas transmission to the outside. Vibration damping design isolates natural frequencies, reducing mechanical noise and bearing wear.
The low-noise fan cover system consists of a structured fan cover body, an air guide cylinder, a protective window, and a silencer plate. Its lightweight design reduces vibration. A side-inlet design optimizes air routing, bypassing obstacles behind the motor and reducing energy-loss noise.
Sound-absorbing linings damp high-frequency blade noise. The assembly is rated IP22, preventing foreign contact while maintaining cooling airflow.
A look into our manufacturing quality and ready-to-ship hazardous duty motors.
Wolong motors undergo testing to comply with international explosion-proof standards, facilitating global market entry.
Nemko / ATEX
CSA
CE Certification
CCC Ex
SABS
TESTSAFE
Operating reliably in critical and high-risk environments worldwide.
Our positive pressure (Ex p) and flameproof (Ex d) motors operate compressors, pumps, and fans in refineries, offshore platforms, and LNG terminals. The robust enclosures contain internal ignition paths, protecting the facility from hydrocarbons and flammable vapors.
Working with our Morley and Nanyang CNE brands, we deliver high-voltage flameproof conveyor motors. These drives resist coal dust accumulation and mechanical impacts, operating reliably in damp, dusty underground mines.
Using our YBF high-voltage flameproof fan motors, we provide ventilation drives for tunnels, chemical warehouses, and grain processing facilities. Integrated variable frequency drives allow precise control of airflow while maintaining explosion-proof protection.
Driving sustainable efficiency through innovative design and smart monitoring.
As industrial systems adopt digital twin models, Wolong is integrating smart diagnostic architectures into our heavy-duty motor designs. Real-time monitoring of winding temperatures, vibration patterns, and current signatures helps identify potential anomalies, reducing maintenance costs and preventing unplanned shutdowns in oil gas and mining plants.
On the materials front, we are researching high-entropy alloys and advanced composite insulation to improve torque density and reduce motor weight. Our engineering teams are also designing permanent magnet explosion-proof synchronous motors that maintain efficiency across a wide range of operating speeds, assisting our clients in meeting global carbon-neutrality targets.
Technical answers to common questions regarding explosion-proof motors.
Explore our specialized high-voltage, dust-proof, and variable frequency explosion-proof drive solutions.
Our application engineers are ready to assist you. Contact us to configure your motor according to required ATEX, IECEx, or NEMA specifications.
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