Premium quality low-voltage and high-voltage AC motors designed to exceed global safety standards including ATEX, IECEx, and EAC.
We supply specialized Exde and Flameproof motors engineered to meet the highest safety integrity levels for hazardous environments. Utilizing dual containment principles (incorporating increased safety "e" terminal boxes and flameproof "d" main enclosures), these systems prevent any internal arc, spark, or high temperature from igniting surrounding explosive atmospheres containing volatile gases, vapors, or combustible dust.
Ready to deploy premium efficiency configurations up to IE4/IE5 standard, alongside cutting-edge permanent magnet synchronous motors (PMSM) that lower carbon footprints and minimize overall system operating expenditure.
Covering fractional horsepower through high-voltage multi-megawatt systems, designed specifically for extreme applications like heavy oil refining, coal extraction, and chemical processing plants.
In modern industrial facilities, the demand for explosion-proof safety drives is escalating rapidly due to stringent government safety mandates, increasing oil and gas exploration, and a global focus on reducing energy loss. Exde motors represent the absolute pinnacle of electrical engineering safety. By integrating the structural rigidity of a Flameproof (Ex d) housing with the electrical connectivity safety of an Increased Safety (Ex e) terminal box, plant operators benefit from double-layered protection without the excessive weight and bulk of traditional fully flameproof designs.
Currently, key markets in the Middle East, North America, and Southeast Asia are undergoing rapid infrastructure upgrades. Modern heavy industries require drive systems that can withstand harsh maritime salt spray, high humidity, and extreme temperature fluctuations from -50°C to +60°C. High-performance squirrel cage AC induction motors and advanced permanent magnet systems are replacing older, less-efficient drive configurations to meet global decarbonization targets.
Powering offshore drill platforms, crude oil transfer pumps, and high-pressure compressors where hydrocarbon vapors are continuously present.
Certified fireproof and flameproof motors developed to endure heavy dust loading and prevent coal dust or methane pocket ignitions.
Specially coated cast iron frames that resist chemical solvents, acidic atmospheres, and severe corrosive environmental conditions.
As the authorized distributor of Wolong Electric Drive Group, Shaanxi Nanfang Motor Technology Co., Ltd. bridges the gap between world-class engineering and competitive cost-efficiency. Our manufacturing ecosystem in China utilizes fully automated stator winding lines, digital VPI (Vacuum Pressure Impregnation) tanks, and real-time computer-guided rotor balancing systems to achieve zero-defect production tolerances.
By sourcing raw materials like high-grade electrical steel sheets and high-purity copper directly from localized partners, we drastically compress lead times. Projects that historically required a 26-week manufacturing timeline in Western factories are routinely completed within 12 to 14 weeks at our facilities, offering an unmatched competitive advantage to international EPC contractors and OEM equipment builders.
Authoritative Global Footprint & Century-Old Brand Legacy
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). Over more than three decades of strategic innovation, Wolong has established 3 manufacturing bases, 39 factories, and 3 R&D centers worldwide, reinforcing its position as a global leader in high-performance motors and digital control systems.
WOLONG has expanded its technology portfolio by acquiring renowned international motor brands with over a century of heritage.
Acquired in 2011, ATB is one of the top three European motor manufacturers. Under Wolong, ATB represents premium industrial reliability, integrating sub-brands such as Morley (for coal mining machinery) and Laurence Scott (nuclear grade low-starting current generators).
A century-old brand pioneering energy-efficient motor design. Offering low, medium, and high voltage AC motors including the premium "W" and "10" series engineered for extreme applications and adjustable speed drive packages.
Established in 1882, Schorch joined WOLONG in 2011. Known globally for setting standards in high-power drive systems for petrochemicals, water treatment pipelines, naval shipbuilding, and tunnel ventilation projects.
In 2015, China's largest scientific research and production base for explosion-proof motors joined Wolong. CNE motors are extensively deployed in high-safety military, coal mining, nuclear power, and hazardous chemical industries.
In 2018, GE's commercial and industrial motor division partnered with Wolong. Operating as a major technological force, GE supports Wolong's drive systems for heavy-duty material processing, mining, and power generation.
Our state-of-the-art facilities located across the globe ensure localization, technological innovation, and localized compliance support.
Accumulating abundant manufacturing assets and design experience over 40 years, WOLONG successfully executed its internationalization roadmap. In 2011, WOLONG acquired a 97.94% controlling stake in the Austrian ATB Group. This acquisition integrated ATB's premium electrical designs into Wolong's robust production network, providing a technical springboard that enhanced our motors' magnetic design, efficiency ratings, and structural durability.
Through the integration of Morley's high-specification underground coal mining drives, Laurence Scott's low-starting current technologies for naval and nuclear plants, and OLI's global leadership in vibration motor (MVE) and Ex vibration sensor solutions, Wolong stands as a premier supplier capable of engineering customized drives for the most critical industrial applications.
Utilizing copper-dense concentric windings to maximize magnetic flux and minimize copper losses under continuous load.
VPI treatment ensures complete resin penetration in the windings, eliminating air bubbles and maximizing thermal dissipation.
Precision balancing under extreme RPM loads prevents shaft runout and extends bearing wear cycles significantly.
Testing motor enclosures in specialized chambers filled with flammable gas mixes to ensure flame containment.
Providing specialized industrial vibrators and sensor monitors built to operate safely in dust-hazardous zone structures.
Heavy industrial housings engineered from premium structural steel plates to withstand physical stress and internal explosion pressure.
Through our coordinated distribution network led by Shaanxi Nanfang Motor, we supply certified products to plant owners, system integrators, and distributors worldwide. Our global manufacturing strategy utilizes 39 facilities to optimize logistics pipelines, reduce shipping delays, and ensure customer service teams are available locally to address project startup issues.
A detailed look at the premium mechanical and electrical design elements that enable our motors to perform safely in hazardous environments.
Our rotors feature a robust squirrel-cage design. Cast aluminum rotors are produced using centrifugal casting or advanced high-pressure die-casting techniques. Molten pure aluminum is injected into the high-precision 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, utilizing reliable bar-securing methods and high-frequency induction welding for the end rings. Additionally, specialized protective retention ring designs for high-speed motors ensure the mechanical integrity of the copper bar assemblies under centripetal loads.
The stator coil is wrapped with polyester film and reinforced with premium glass cloth, using low-powder mica tape with a high mica content. Following the assembly phase, the complete stator core undergoes a meticulous VPI (Vacuum Pressure Impregnation) process, resulting in a clean, highly insulated winding block.
The winding and insulation insulation system is engineered to provide exceptional electrical properties, mechanical strength, moisture resistance, and thermal stability (complying with Class F/H thermal margins).
The motor frame is designed using digital simulations that model structural and fluid multi-physics fields. This design maintains our patented structure and uses high-strength cast iron or structural steel plates.
The frame design offers structural redundancy, efficient heat dissipation channels, and ample resonance isolation margins. It is built to withstand mechanical shocks, maintain low vibration levels, and ensure a lower temperature rise under full-load operation.
The low-noise ventilation cover system includes a contoured fan cover body, an air guide cylinder, a protective window, and a silencer plate. Its compact, lightweight design helps minimize operating vibration.
The side air inlet design optimizes airflow around obstacles behind the motor, reducing energy losses and noise generation. The system also includes sound-absorbing materials to damp high-frequency harmonics, with an overall rating of IP22 to prevent accidental contact with the rotating fan blades.
Our manufacturing processes and motors comply with international testing parameters, simplifying global export and site approvals.
Validates compliance for mechanical and electrical safety inside the European Economic Area (EEA) explosive atmospheres.
Certifies conformance with North American standards, covering Canada and USA hazardous division installations.
Declaration of conformity with safety, health, and environmental protection requirements in the EU.
Mandatory safety standard clearance validating explosion-proof electrical safety within China.
Validates compliance and safety for motor operations in South African industrial and deep mining environments.
Regulatory approval for coal mining drives entering Australia, establishing compliance in the Southern Hemisphere.
By implementing a unified quality control structure, WOLONG has secured major international certifications to support regional installations:
Our high-performance drives are designed for reliable operation in demanding industries worldwide.
WOLONG's motors and drive systems are built to support demanding industrial machinery, including high-capacity ventilation fans, centrifugal water pumps, process gas compressors, and heavy materials handling systems.
Key industries of deployment include:
Expert answers regarding Exde motors, compliance standards, and mechanical configurations.
Explore our variable frequency, permanent magnet, and low-voltage high-efficiency motors designed for demanding process applications.
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