Explore our high-performance explosion-proof and heavy-duty industrial electric motors, designed to work under extreme conditions.
Shaanxi Nanfang Motor Technology Co., Ltd. is the authorized distributor of Wolong. Wolong Electric Drive Group Co., Ltd. was founded in 1984 and successfully listed in 2002 (code SH600580).
After more than 30 years of development, Wolong has 3 manufacturing bases, 39 factories, and 3 R&D centers worldwide now. Wolong has always focused on the manufacture of motors and control systems, committed to a global brand strategy, making Wolong a leader in R&D, technology, process, manufacturing, and sales in the global market.
"Delivering top-tier industrial electric motor drive technologies across the globe, adhering to stringent standards for safety and operational output."
Tailored solutions meeting hazardous, marine, and ultra-high efficiency environment needs globally.
We provide full explosion-proof certifications (including ATEX, IECEx, CU-TR, EAC) to ensure safety in hazardous, zone-classified gas and dust operations globally.
Available in IE3, IE4, and the latest ultra-efficient IE5 rating structures. We also offer permanent magnet frequency control configurations to maximize electric drive energy conservation.
Our expansive industrial line covers low, medium, and high-voltage AC electric motors designed to perform consistently in tunnels, marine hulls, chemical pipelines, and mining shafts.
Harnessing the engineering power of the world's most trusted century-old industrial motor manufacturers.
Wolong has established state-of-the-art motor and drive control R&D centers across China, Europe, and Japan, complemented by a Central Research Institute in Shanghai. This framework is dedicated to studying leading-edge magnetic topologies, thermal modeling, and control dynamics, propelling several of our products to international industry-leading standards.
By blending Western design philosophies with East Asian supply chain agility, we deliver superior value in every unit produced.
Wolong controls a portfolio of historic and modern electric motor brands. This includes Nanyang Explosion, alongside internationally recognized brands such as Brook Crompton, Morley, Laurence Scott, Schorch, and ATB. This rich integration offers customers access to custom mining motors, nuclear-grade safety pumps, low-vibration marine drives, and custom high-speed applications.
Additionally, with our joint venture partner OLI and the acquisition of GE Industrial Commercial motors, we maintain a complete supply chain presence globally.
How Wolong acquired and optimized world-leading electrical equipment brands into a single global powerhouse.
Accumulating abundant assets and decades of manufacturing experience, Wolong acquired 97.94% of the Austrian ATB Group, positioning itself as a premier global motor manufacturer. ATB includes the world-famous Morley and Laurence Scott brands.
Morley: Boasting nearly 130 years of history, Morley is highly esteemed in the underground mining market, offering ultra-robust coal cutters and conveyor motors.
Laurence Scott: Known for supplying nuclear-grade motors with low starting currents to naval vessels and energy sectors, Laurence Scott has won the prestigious Queen's Award for three consecutive years.
Brook Crompton: With over a century of technology development, Brook Crompton has pioneered energy-efficient motor designs. Their premium "W" and "10" series provide adjustable speed drive packages designed for optimal efficiency and reliability in harsh, hazardous chemical and oil and gas fields.
Schorch: Founded in 1882, Schorch sets high standards in heavy drive applications, powering infrastructure projects like tunnels, pipelines, marine ports, and water treatment networks worldwide.
In 2018, GE Industrial Motors joined the Wolong Group, adding massive commercial and industrial expertise. This integration serves heavy industries, including petrochemicals, metallurgy, mining, paper mills, and cement processing, with time-tested engineering designs.
This followed the integration of Nanyang Explosion Group (CNE) in 2015, which is China's largest scientific research and manufacturing base for explosion-proof motors, supporting nuclear power stations and national defense projects.
Meeting international quality and safety benchmarks to ensure reliable project execution.
Nemko/ATEX
CSA
CE
CC / CCC
SABS
TESTSAFE
WOLONG implements a comprehensive marketing and production quality strategy across the electric motor supply chain, obtaining major global certifications to facilitate international market access:
A breakdown of the precision components and engineering configurations that ensure high safety and durability.
Our rotors feature a robust squirrel cage design. Cast aluminum is widely utilized, produced using either centrifugal casting or high-pressure die-casting techniques. This process pours molten, pure aluminum directly into the slots of the rotor core, creating a single-piece construction that integrates the rotor bars and end rings.
For larger-capacity motors, copper bar rotors are used, secured with high-grade welding procedures. The protective ring design on high-speed configurations further ensures stable mechanical operation under continuous load.
The motor coils are crafted using high-grade polyester film reinforced with glass cloth and high-mica-content tapes. After winding, the stator core undergoes a VPI (Vacuum Pressure Impregnation) process, resulting in a solid, moisture-resistant assembly.
This process eliminates air gaps within the slots, providing high dielectric strength, thermal dissipation, mechanical rigidity, and resistance to environmental moisture and chemical vapors.
The motor frame is designed using digital platforms for multi-physics structural and fluid simulations (CFD). The frame is cast from high-strength cast iron (or fabricated steel as an alternative), featuring generous safety margins and optimized cooling rib profiles.
This heavy construction limits mechanical vibration, provides high shock resistance, and maintains low running temperatures to prolong bearing and insulation life.
Designed to minimize aerodynamic noise, this system comprises a structured fan cover, air guide cylinder, protective window, and silencer plates. The side air inlets bypass obstacles at the back of the motor to optimize airflow.
It integrates sound-absorbing materials to damp high-frequency whistling, while carrying an IP22 safety rating to prevent accidental physical contact with the fan blades.
Powering critical systems across heavy industries in challenging global environments.
Wolong's engineering footprint spans 39 manufacturing sites and 4 global R&D centers across the UK, Germany, Austria, China, Italy, Mexico, India, and Vietnam. This allows us to supply certified electric motors tailored for key industrial equipment, including high-capacity industrial fans, water pumps, gas compressors, and heavy excavation machinery.
Designed to operate safely in refineries and drilling platforms where volatile gases are present. Our flameproof (Ex d) and increased safety (Ex e) designs prevent internal sparks from igniting external atmospheres.
Featuring DNV, ABS, and Lloyd's Register type approvals, these motors are built to withstand saltwater corrosion, high humidity, and high structural vibrations on marine vessels.
Our Morley series tunnel-boring and coal-cutter motors are built to withstand heavy physical impacts, abrasive dust, and wet conditions in underground mining environments.
Why modern industrial enterprises source from China's optimized industrial manufacturing ecosystems.
Sourcing explosion-proof fan motors directly from China leverages a mature industrial ecosystem. Shaanxi Nanfang Motor, in partnership with Wolong, utilizes a localized supply chain of high-grade electrical steel, synthetic resins, specialized bearings, and automated casting facilities. This cluster system reduces lead times and logistics costs while maintaining high manufacturing precision.
When engineering and procurement managers evaluate OEM suppliers, they prioritize risk mitigation. A reliable supplier must satisfy the following technical parameters:
As carbon taxes and environmental regulations tighten, industrial operations are transitioning to Permanent Magnet Synchronous Motors (PMSM). These drives maintain high efficiency even at partial loads, reducing total cost of ownership (TCO) over a typical 15-year operational lifecycle.
Technical answers to common engineering questions regarding explosion-proof fan motors.
Flameproof (Ex d): Designed with a robust enclosure capable of withstanding an internal explosion of gas or vapor without sustaining damage, and preventing the flame from propagating to the surrounding explosive atmosphere through joints or clearances.
Increased Safety (Ex e): Focuses on preventing arcs, sparks, or dangerous hot spots from forming on internal or external components under normal operating conditions by using high-quality insulation and enhanced mechanical clearances.
Running on a VFD can cause additional heat buildup at lower operating speeds due to reduced fan cooling. Additionally, high-frequency voltage spikes can stress winding insulation. Therefore, VFD-driven explosion-proof motors must be certified for inverter duty, typically utilizing embedded RTD temperature sensors and insulated bearings to prevent damage.
DNV Type Approval confirms that the motor design complies with strict maritime regulations. These standards verify that components can handle salt spray corrosion, pitch and roll tilting, high humidity, and structural vibration, ensuring safe operation in international waters.
Additional explosion-proof, tunnel-boring, and variable-frequency motors designed for demanding industrial projects.
NANFANG
