Engineered for highly volatile oil & gas, chemical processing, coal mining, and marine installations globally.
Shaanxi Nanfang Motor Technology Co., Ltd operates as the premier authorized global distributor of Wolong Electric Drive Group Co., Ltd. Established in 1984 and listed on the Shanghai Stock Exchange in 2002 (code SH600580), Wolong has grown to become the defining powerhouse in high-quality electric motor and drive manufacturing globally.
Backed by over 30 years of continuous technical innovation, Wolong now manages 3 major worldwide R&D hubs, 39 advanced manufacturing factories, and 3 production bases across China, Europe, Japan, and North America. Wolong's comprehensive global supply strategy position its premium motor brands at the forefront of international standards compliance, engineering capability, and long-term operating reliability.
Offering highly resilient drivetrains designed for ultimate process uptime, energy saving compliance, and explosive environment protection.
Full suite of international certificates complying with EN/IEC 60079 series standards. Crucial for petrochemical and underground mining operations requiring Ex d (flameproof), Ex e (increased safety), Ex p (purged/pressurized), and Ex n (non-sparking) protection systems.
Wolong utilizes advanced magnetic materials and optimized stator windings, yielding IE3, IE4, and ultra-high premium IE5 level energy efficiency. We supply both induction AC motors and Permanent Magnet (PM) synchronous drives to lower carbon footprints.
A broad portfolio spanning low-voltage auxiliary drive systems to ultra-large high-voltage (HV) custom motors. Perfectly suited to direct-online (DOL) or VFD-driven compressors, cooling fans, heavy industrial slurry pumps, and material conveyors.
Combining domestic engineering innovation with the heritage of world-renowned century-old motor brands.
Wolong has established state-of-the-art Research and Development institutions across China, Europe, and Japan, complemented by a Central Research Institute in Shanghai. Through structural and fluid multi-physics simulations, our products exceed safety tolerances while keeping operational noise to a absolute minimum.
By integrating leading domestic names such as Nanyang Explosion Motor (CNE) alongside legacy international brands like Brook Crompton, Morley, Laurence Scott, Schorch, and ATB, Wolong has cemented its position as a high-authority provider for petrochemical, nuclear power, and marine installations.
Wolong Ex-proof motors deliver mechanical redundancy, insulation durability, and corrosion resistance. Our lines are extensively utilized across demanding oil refinery platforms, offshore rigs, and volatile coal mines, fully backed by certified agencies globally.
Starting in China, Wolong achieved international prominence through several landmark strategic acquisitions that unified global electric drive technology.
Our motors are tested, documented, and certified to meet high-level quality criteria, bypassing import hurdles and trade barriers.
Nemko / ATEX
CSA Standard
CE Certification
CCC Certificate
SABS Standard
TESTSAFE
WOLONG's integrated marketing strategy encompasses crucial compliance certificates to serve global industries smoothly:
A closer look at the advanced components that guarantee explosive defense, structural protection, and operating performance.
Our motor rotors utilize a robust squirrel cage layout. Cast aluminum rotors are manufactured using centrifugal aluminum casting or high-pressure die-casting. The molten pure aluminum fills the rotor slots as a single-piece construction, integrating rotor bars and end rings.
This dynamic design ensures reliability and torque production. For high-output applications, welded copper bar rotors are selected. Secure mechanical binding and premium end ring welding prevent structural failures under intense transient starting currents. In high-speed variants, specialized non-magnetic retaining rings preserve copper bar geometry.
The stator coil is built using double-wound polyester film reinforced with high-density glass cloth. High-mica content tape provides insulation reliability. The stator core undergoes a precise Vacuum Pressure Impregnation (VPI) process.
This process fills internal air pockets with specialized resin, producing a solid, uniform winding structure. The resulting stator insulation offers mechanical rigidity, thermal dissipation, and resistance to environmental moisture and chemical vapors.
Optimized using digital multi-physics thermal and fluid simulation suites, the motor frame utilizes high-strength cast iron. Alternative steel frames are available for weight-critical installations. The frame offers mechanical safety margins, thermal dissipation pathways, and natural frequency isolation.
This design allows the motor to withstand mechanical shocks and vibration while maintaining low operational temperature rises, protecting interior components from premature thermal fatigue.
The fan cover assembly consists of an air guide cylinder, protective window, silencer plate, and outer hood. The compact, low-weight structure is designed to isolate structural vibrations. Side-facing air intakes circumvent wall interference and reduce aerodynamic noise.
Integrated acoustic absorption materials lower overall noise emissions. The system carries an IP22 safety rating, preventing personnel from contacting the fan blades.
Deep-dive research for global engineering procurement managers, operations directors, and system integrators.
The global industrial drive market is undergoing an energy transition. Modern processing plants require safety along with efficiency. Energy cost regulations are pushing motor designs from standard IE3 configurations toward IE4 and IE5 standards.
Traditional induction designs are reaching physical limits. Consequently, Permanent Magnet (PM) synchronous motors are becoming more common in hazardous areas. These motors maintain high efficiency even when operating at partial loads under variable speed control.
Additionally, the adoption of industrial Internet-of-Things (IIoT) sensors has changed standard maintenance workflows. Modern explosion-proof motors are designed to support digital vibro-thermal sensors, winding RTDs, and bearing monitors. This enables operators to predict mechanical faults before they lead to downtime in offshore platforms or pipeline pump houses.
Enterprise procurement teams face complex regulatory environments when specifying electric drives for flammable gas or combustible dust applications. Main procurement priorities include:
Wolong motor designs are optimized for specific industrial challenges:
As a global exporter, Shaanxi Nanfang Motor Technology Co., Ltd provides localized engineering assistance. We help clients choose correct replacement frames, calculate load curves for variable frequency operation, and configure terminal box geometries.
Our localized services help simplify international supply chains by ensuring delivered equipment aligns with local standards, including Class/Division configurations in North America, ATEX directives in Europe, and Testsafe standards in Australia.
Wolong's future technology strategy focuses on three main initiatives:
Answers to common engineering questions regarding selection, compliance, and operation in hazardous areas.
Ex d (Flameproof): The motor enclosure is designed to contain any internal explosion of a flammable mixture. It prevents the ignition of the surrounding explosive atmosphere by cooling hot gases through the flamepaths before they exit the frame.
Ex e (Increased Safety): This design focuses on preventing electrical arcs, sparks, or hot surfaces from occurring inside the motor during normal operation. It uses specialized insulation, wider clearances, and strict temperature limits.
Operating an explosion-proof motor via a Variable Frequency Drive (VFD) introduces harmonic heating and shaft currents. To maintain the safety certification, the motor must be certified for VFD use, often utilizing winding RTDs to monitor temperatures or insulated bearings to prevent electrical pitting.
Ex p protection maintains a continuous overpressure of clean air or inert gas inside the motor housing. This pressure barrier prevents explosive ambient gases from entering. It is often used for large synchronous motors where flameproof enclosures are impractical.
Combustible dusts (Zone 21/22, Group III) create ignition risks through dust clouds or layer accumulation on hot surfaces. Ex t enclosures are dust-tight (IP6X) to prevent ingress, with external surface temperatures limited to prevent dust ignition.
Morley motors are designed for underground coal mining. With heavy-duty steel construction, water-cooled jackets, and high-specification Ex d I Mb ratings, they handle high vibration, dust, and moisture in confined spaces.
Custom-engineered high-voltage induction and asynchronous drives designed for large-scale utility projects.
NANFANG
