Discover our core line of internationally certified low-voltage and high-voltage three-phase induction systems engineered for extreme industrial environments.
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 on the Shanghai Stock Exchange in 2002 (code SH600580). With over three decades of dynamic industrial evolution, Wolong operates 3 premier manufacturing bases, 39 advanced factories, and 3 state-of-the-art global R&D centers.
Focusing on the engineering and precision manufacturing of motors and control systems, Wolong executes a global brand strategy, maintaining its position as a technological and market pioneer in R&D, processing, and sales across every major industrial continent.
Critical power transmission in high-risk zones demands absolute explosion-proof reliability.
In the modern macro-industrial landscape, safety, energy efficiency, and operational continuity are the cornerstones of global manufacturing. Flameproof three-phase induction motors represent the primary workhorses in explosive gas and dust atmospheres, heavily relied upon in petrochemical plants, coal mines, maritime platforms, and heavy-duty logistics installations. As hazardous area regulations tighten globally, the transition from standard induction units to strictly certified flameproof architectures has accelerated.
The global demand for explosion-proof machinery is propelled by expanding exploration in oil and gas, safety mandates in underground mining, and the rise of hydrogen processing plants. This sector is characterized by strict barriers to entry: motors must withstand internal explosions without propagating flames to the surrounding atmosphere. Our mission as a premier OEM supplier is to deliver uncompromised mechanical reliability that complies with localized directives such as Europe's ATEX, international IECEx, North American NEMA, and Australian TESTSAFE frameworks.
Furthermore, the drive for global carbon neutrality requires these specialized motors to meet stringent premium efficiency ratings (IE3, IE4, and the emerging IE5 standards) without compromising their flameproof integrity. Developing thermal isolation, thick cast-iron frames, and robust terminal enclosures that simultaneously achieve high power density and energy conservation is the hallmark of Wolong's R&D capability.
Engineered to meet hazardous zone compliance, energy efficiency targets, and extreme mechanical stress.
We provide a comprehensive range of explosion-proof certificates tailored to your specific regional and industrial requirements, facilitating seamless integration and rapid regulatory approval.
Available in IE3, IE4, and ultra-high IE5 efficiency tiers, including permanent magnet synchronous types, engineered to reduce operational expenditure and lower carbon emissions.
Covering standard low-voltage induction drives to customized high-voltage asynchronous motors for tunnel boring machines, continuous mine conveyors, and severe duty chemical pumps.
Decades of technological integration and brand heritage defining the vanguard of motor engineering.
Wolong has established dedicated motor and drive control R&D centers in China, Europe, and Japan, complemented by a Central Research Institute in Shanghai. Driven by continuous academic and empirical exploration, our proprietary control algorithms and electromagnetic designs deliver performance at the global forefront of motor science.
Wolong integrates the legacies of domestic leaders like Nanyang Explosion-Proof Motor with internationally renowned, century-old industrial marques. Brands such as Brook Crompton, Morley, Laurence Scott, Schorch, and ATB provide reliable, high-specification equipment to the global mining, oil, gas, and nuclear power industries.
Our explosion-proof induction motors exhibit class-leading attributes in mechanical durability, thermal resilience, and spark-containment engineering. Extensively deployed in demanding underground mines and deep-sea vessels, they possess international certifications including ATEX, IECEx, CU-TR, CSA, UL, and SABS.
How Wolong integrated premier global motor brands to construct a unified technological supply chain.
In 2011, Wolong expanded its technical base by acquiring 97.94% of the Austrian ATB Group, a leading European motor manufacturer. This acquisition integrated ATB's premium product portfolio and specialized brands:
Morley Motors: With a 130-year lineage, Morley is renowned in the underground mining sector. It has become synonymous with heavy-duty coal-cutter motors, supplying robust mine equipment globally.
Laurence Scott: Renowned for engineering low-starting-current high-voltage motors and military-grade naval generators, Laurence Scott pioneered safety-critical motors for British nuclear power installations.
Brook Crompton Motors: As a pioneer in energy-efficient drives, Brook Crompton brought a century of design expertise to the group. Their premium "W" and "10" series low and medium voltage motors are designed for high efficiency in hazardous industrial settings.
Schorch Motors: Established in 1882, Germany's Schorch is a standard-setter in high-output explosion-proof drives for petrochemical projects, waste management, steel refineries, and tunnel boring machinery.
OLI Vibration Motors: Since 1999, Wolong has operated a joint venture in China for OLI, a global supplier of vibration motors (MVE series) and Ex-certified vibration sensors.
CNE (Nanyang Explosion-Proof Group): In 2015, China's largest explosion-proof motor research and manufacturing base officially merged with Wolong, uniting national defense, nuclear power, and petrochemical propulsion engineering under one platform.
General Electric (GE) Industrial Business: In 2018, Wolong acquired GE's commercial and industrial motor division, integrating their medium and high voltage designs for heavy process industries.
An inside-out look at the metallurgy, fluid dynamics, and insulation technology of our flameproof motors.
The rotor features a squirrel cage design. Cast aluminum versions are produced using centrifugal casting or advanced high-pressure die-casting. This creates a unified assembly integrating the rotor bars and end rings, optimizing electrical conductivity and starting torque characteristics.
For large-capacity motors, copper bar rotors are utilized, featuring brazed copper joints and protective retaining rings. This design handles the centrifugal forces and high thermal stresses of high-speed start-up cycles.
The stator coils are wrapped in polyester film and reinforced with glass cloth. We utilize premium low-powder or medium-powder mica tape with high mica content to achieve high dielectric strength.
The stator undergoes Vacuum Pressure Impregnation (VPI), followed by thermal curing. This process fills air gaps, bonding the stator core and windings into a moisture-resistant and thermally stable structure rated for Class F or H operation.
Developed using structural and fluid multi-physics field simulations, our motor frames are constructed from high-tensile cast iron or steel.
This structure is designed to contain internal explosions without rupture. High-efficiency cooling fins improve heat dissipation, maintaining low surface temperatures in explosive gas environments (T4, T5, or T6 classes).
The ventilation assembly features a streamlined fan cover, air guide cylinder, protective window, and acoustic silencer plate.
A side-inlet design optimizes air flow and reduces noise levels from acoustic turbulence. The fan hood complies with IP22 standards to prevent physical contact with moving parts, and utilizes non-sparking materials for added safety.
Compliant with leading global standards for industrial operations.
Nemko / ATEX
CSA Group
CE Directive
CCC Ex
SABS Ex
TESTSAFE
Wolong drive systems power major projects globally, supporting ventilation systems, resource extraction, and heavy-duty machinery.
With 39 manufacturing facilities and 4 global R&D centers spanning China, Vietnam, the UK, Germany, Austria, Italy, Serbia, Mexico, and India, Wolong serves critical sectors worldwide.
Our motors drive high-performance equipment including petrochemical pumps, processing compressors, mining conveyors, and tunnel boring systems. They are deployed in ventilation, maritime transport, nuclear energy plants, and industrial automation.
Whether operating under high pressures in petrochemical installations or deep underground in mines, Wolong motors are engineered to meet safety and efficiency standards.
Designing the future of explosion-proof propulsion through research and technology integration.
We continue to develop IE5 and higher permanent magnet synchronous motors (PMSM) for hazardous locations. Combining explosion-proof design with high efficiency helps operators reduce energy consumption in critical environments.
Integration of Ex-certified sensor packages enables real-time monitoring of vibration, temperature, and current. This data-driven approach supports predictive maintenance to help prevent unscheduled downtime.
Research into subsea operations, cryogenic settings, and high-temperature environments guides our development of robust sealing technologies and specialized insulation systems to ensure reliable long-term service.
Addressing key engineering and selection questions for flameproof three-phase induction motors.
Explore our specialized high-temperature, permanent magnet, and flameproof conveyor series.
NANFANG
