Engineered for oil, gas, chemical, coal mining, and heavy industrial environments requiring reliable flameproof and dust-proof actuation solutions.
Authorized Distributor of Wolong Electric Drive Group Co., Ltd. — Delivering Global Motor Innovation since 1984
Shaanxi Nanfang Motor Technology Co., Ltd. is the premier authorized distributor of Wolong. Founded in 1984, Wolong Electric Drive Group successfully listed on the Shanghai Stock Exchange in 2002 (code SH600580). Over the past three decades, Wolong has expanded to encompass 3 major manufacturing bases, 39 manufacturing factories, and 3 high-tech R&D centers across the globe. By maintaining a deep focus on the development of electric motors and control systems, Wolong establishes unmatched global standards in production quality, digital design, and multi-market deployment.
How Wolong incorporated century-old industrial brands into a singular, powerhouse electrical supply network.
Accumulated with abundant assets and brilliant experiences in manufacturing, WOLONG started to reach for higher attempts. To be the leading manufacturer of AC motors & drives worldwide, WOLONG strove to acquire overseas groups.
In 2011, WOLONG company acquired strong technical and technological support. WOLONG's holding group successfully acquired 97.94% of the Austrian ATB Group (ATB motor), one of the three major European motor manufacturers, becoming the actual controller of the ATB Group. This propelled Wolong into a world-renowned, high-strength global motor manufacturing position. The ATB Motor Group included the brand Morley in the mining industry and Laurence Scott, both of which are excellent in motor manufacturing.
Morley Motor, with nearly 130 years of history, has been closely linked to underground coal mining. Currently, the Morley brand is highly esteemed in the global underground coal market and has become synonymous with quality, power, and reliability. It is a manufacturer that provides mining motors with high-specification, high-performance, and high-quality electrical equipment for the global market.
Laurence Scott, the pioneering company that supplied motors for British nuclear power plants, is renowned for manufacturing equipment with low starting currents and also equips British naval vessels with generators. Following its acquisition by WOLONG, the company was honored with the Queen's Award for three consecutive years.
Furthermore, Brook Crompton Motors joined the WOLONG group as well. Brook Motor stands as a venerable and profoundly skilled participant within the electric motor sector, boasting over a century of mastery in the technology and design of electric motors. With its extensive background in technological innovation and design, Brook Crompton Motors leads the way in motor technology advancements and pioneers the creation of energy-efficient motors.
Driven by technology and innovation, Brook Crompton Motor has developed a complete range of low voltage, medium voltage, and high voltage AC motors, including the premium Brook Crompton "W" and "10" series, and motors suitable for operation in hazardous and harsh environments. Brook Crompton also provides user-friendly adjustable speed drive packages to provide users with efficient and reliable drive systems.
Schorch electric motor joined WOLONG in 2011. Since its establishment in 1882, Schorch has set the standard for high-quality motors. The company offers a diverse range of driving systems to customers globally, catering to both domestic and international projects.
Schorch collaborates with its strongest partners to provide services across various industries, including oil and gas, chemicals, power generation, water supply and wastewater management, shipbuilding, steel and metal processing, test stations, tunnels, and so forth.
Regarding the vibration motor (MVE) and Ex vibration sensor, OLI Brand owns the largest market around the globe. Dating back to the year of 1999, WOLONG has jointly started the business with OLI vibration motor in China.
In 2015, WOLONG Electric Nanyang Explosion-Proof Group Co., Ltd. (CNE), China's largest explosion-proof motor scientific research and production base, joined the WOLONG Group, successfully realizing strategic cooperation. With various types of explosion-proof motors, low-voltage asynchronous motors, and Ex-proof high-voltage motors, Nanyang Explosion Group's motors are mainly used in oil, coal, chemical, metallurgy, electricity, military, nuclear power, and other fields.
In 2018, General Electric (GE) joined the ranks of WOLONG. As the oldest manufacturer of commercial and industrial electrical equipment, GE caters to a multitude of heavy industries, encompassing oil and gas, petroleum and chemicals, power generation, mining and metal processing, paper, water treatment, cement, and materials processing. With abundant experience in electric motor manufacturing, GE provides huge support to WOLONG.
Analyzing global supply chain integration, cost optimization, international standards alignment, and structural innovations.
When global EPC (Engineering, Procurement, and Construction) companies specify low-voltage motors for hazardous environments, the primary risk metrics are explosive gas containment (flameproof Ex d / Ex db) and dust ignition protection (Ex t). Utilizing a centralized Chinese manufacturer with localized support eliminates the multi-tier markups of historical distribution models while maintaining compliance with international standards.
China’s domestic industrial framework provides a dense network of high-grade copper wire drawing facilities, specialized metallurgical castings, and precision machining suppliers. Wolong's centralized procurement and production structures at Nanyang Explosion Group reduce component transit times and lower manufacturing overhead by 25-35%. This high concentration of core component vendors guarantees supply chain resilience against global shipping delays and ensures stable raw material cost indexing.
International procurement demands absolute compliance. Global projects must align with localized explosion-proof safety laws such as Europe's ATEX Directive (94/9/EC) and the international IECEx system. Wolong motors carry unified, dual-marked certifications. This permits global EPC operators to purchase a single motor design that meets both European, North American (CSA/UL), and Asia-Pacific regulatory requirements, greatly reducing design verification overhead.
Heavy industries are under strict mandates to lower Scope 1 and Scope 2 carbon emissions. Premium efficiency (IE4) and super-premium efficiency (IE5) motors have transitioned from premium upgrades to baseline specifications. By optimizing the stator coil winding density, utilizing ultra-low loss silicon steel sheets, and deploying Permanent Magnet Synchronous Motors (PMSM) like the WEPM series, Wolong cuts core losses and improves overall energy output.
A deep look into the key components that define the thermal performance, insulation lifespan, and explosion-containment boundaries of Wolong motors.
The rotor features the squirrel cage design, with cast aluminum rotors being widely utilized. These rotors are produced using either centrifugal aluminum casting or die-casting techniques, where molten pure aluminum is poured into the slots of the rotor core, resulting in a single-piece construction that integrates the rotor bars and end rings. The structural integrity and manufacturing process of cast aluminum rotors guarantee the motor rotor's reliability and also endow the motor with outstanding torque properties. For larger capacity motors, copper bar rotors are employed, which benefit from dependable bar securing and end ring welding procedures. Additionally, the protective ring design of high-speed motors further ensures the reliable operation of the copper bar rotor.
The coil is crafted from polyester film and reinforced with glass cloth, utilizing either low-powder mica tape with a high mica content or medium-powdered mica tape with an abundance of mica. Following the VPI (Vacuum Pressure Impregnation) process, a pristine white coil emerges from the production line. After the billet is extracted from the wire, it proceeds through the VPI process to transform into a finished unit. The winding and insulation are meticulously engineered to provide exceptional electrical performance, mechanical strength, resistance to moisture, and thermal stability.
The motor frame employs a fully digital platform for structural and fluid multi-physics field simulations. This simulation platform retains the original patent's structure and design, utilizing mature, high-strength cast iron (or steel as an alternative). The frame boasts exceptional structural redundancy, outstanding heat dissipation properties, and ample inherent frequency isolation margins for the entire machine. It is engineered to endure significant mechanical shocks, maintain a superior vibration level, and ensure a lower temperature increase in the motor.
The low-noise fan cover system comprises a fan cover body, an air guide cylinder, a protective window, and a silencer plate. Its compact structure and lightweight design facilitate vibration reduction. The air inlet is situated on the side, which optimizes the avoidance of obstacles behind the motor, minimizing adverse effects on ventilation and reducing noise caused by energy loss during propagation path changes. The system also incorporates sound-absorbing materials that absorb noise, thereby lowering the overall motor noise. Additionally, the fan cover is rated IP22, ensuring that hands cannot come into contact with the fan.
Wolong motors are deployed across highly demanding heavy industries, serving as the prime movers for fans, pumps, compressors, and high-load machinery.
In oil refineries, petrochemical processing plants, and offshore platforms, combustible gases such as ethylene, hydrogen, and propane are common. Wolong ATEX/IECEx certified flameproof motors (Class I, Group IIC) run safely inside these hazardous areas. They drive high-pressure water pumps and gas compressors, ensuring no internal spark can breach the enclosure.
Underground coal mines deal with heavy coal dust deposits and pockets of explosive methane gas. Partnering with Morley, Wolong provides ultra-robust cast-iron flameproof motors specifically tailored for underground coal conveyors, shearers, and continuous mining machines. They handle severe mechanical shocks and continuous duty cycles.
Marine applications require protection from salt spray corrosion, vibration, and extreme moisture. Wolong YQ series marine motors carry type approval certificates from major classification societies like DNV. This guarantees that onboard ventilation fans, bilge pumps, and deck machinery operate reliably under harsh marine conditions.
Wolong has secured the majority of product certifications, enabling it to penetrate the international market and overcome strict trade barriers.
IECEx / ATEX Certificate
CNEX Quality Seal
CE Conformity
UL / CSA Approval
TESTSAFE Standard
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
ISO Standard: Wolong is an ISO 9001 certified Ex motor manufacturer. This certification helps the group overcome international trade barriers and enter global markets, serving as a prerequisite for Wolong's production, business operations, and trade.
NEMA Standard: To confirm that Wolong's electric motors meet NEMA's mechanical performance specifications, we conduct thorough testing. This includes efficiency tests, insulation resistance testing, starting current and torque tests, durability testing, and vibration and noise testing. For low-voltage motors, Wolong has acquired UL and CSA certificates.
IECEx & ATEX Standards: For both low & high-voltage flameproof motors, Wolong has acquired IECEx and ATEX certificates, streamlining export pathways to EU countries.
TESTSAFE Standard: Testsafe is the largest coal product certification body in the Southern Hemisphere. The acquisition of Testsafe certification has completely opened the channel for Chinese coal mining motors to enter Australia. This lays a solid foundation for Wolong's coal mining equipment to enter the Australian and international markets, further enhancing Wolong's integration with the international community.
Expert answers addressing the design, certification, and operational parameters of explosion-proof low-voltage motors.
From NEMA-standard industrial motors to variable-frequency high-voltage units, our solutions meet diverse global specifications.
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