Premium low voltage, high efficiency, and hazardous-area flameproof motors engineered for heavy-duty process machinery.
As the authorized primary distributor of Wolong Electric Drive Group Co., Ltd., Shaanxi Nanfang Motor Technology Co., Ltd. connects global industrial operators with world-class motor solutions. Wolong, founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (code SH600580), has established itself as an unmatched global force in the motor and drive control sector.
With 3 main manufacturing bases, 39 advanced factories, and 3 state-of-the-art R&D centers globally, Wolong leads technology innovation and market expansion. The group's strategy blends localized custom engineering with a powerful international network of premier historical brands, optimizing system safety, performance, and efficiency in every configuration.
Analyzing the strategic role of Flange Foot Mounted Motors in modern heavy industry and process automation.
The Flange Foot Mounted Motor (commonly identified by the IM B35 mounting designation under IEC standards) serves as the structural foundation of heavy industrial machinery. Combining the rigid support of foot mounting (IM B3) with the precise structural integration of flange mounting (IM B5), these motors eliminate axis misalignment and absorb high radial and axial mechanical loads. This dual-mount design is critical for high-torque applications such as conveyor gearboxes, high-volume fluid pumps, and mine ventilation fans where alignment stability cannot be compromised.
With global industrial operations consuming over 40% of the world’s electricity—of which electric motors make up the vast majority—the transition to IE3, IE4, and IE5 ultra-premium efficiency standards has shifted from voluntary to regulatory. Modern industrial purchasing policies prioritize minimized Total Cost of Ownership (TCO) and low carbon footprints. The incorporation of advanced permanent magnet synchronous motors (PMSM) controlled via variable frequency drives (VFD) represents a major upgrade, delivering energy savings of up to 30% under partial load conditions.
China's motor factories have transitioned from basic component manufacturing to pioneers in automated motor assembly, advanced stator winding processes, and digitalized testing. Large-scale domestic integration allows for swift, cost-effective custom configurations (such as custom shafts, specialized bearing designs, and non-standard flange specifications). By combining automated production lines with rigorous quality control, factories deliver world-class motors that meet international IEC, NEMA, and ATEX standards while maintaining highly competitive lead times.
Standard motor systems fail under severe environmental stresses, such as high moisture, explosive dust, or chemical gases. Specialized industrial setups require flameproof, explosion-proof, and positive pressure enclosures. By deploying double-shielded, vacuum-pressure impregnated (VPI) class F or H insulated stators, combined with corrosion-resistant cast iron frames and explosion-proof terminal boxes, modern manufacturing processes ensure continuous, safe operation in hazardous chemical complexes, deep underground coal mines, and maritime vessels.
Combining technological superiority and rigorous certifications to meet every extreme application demand.
Different kinds of Ex certificates are available for your specific industry and geographic market. Our products are fully certified to work in Zone 1, Zone 2, Zone 21, and Zone 22 hazardous areas globally.
IE5, IE4, and IE3 efficiency configurations are available. We also offer advanced Permanent Magnet Synchronous Motors (WEPM) designed for variable frequency control systems to maximize energy conservation.
Our rich product line spans high-efficiency low-voltage asynchronous motors, high-voltage AC induction motors, flameproof machinery drives, marine motors, and tunnel boring solutions.
How Wolong Electric Drive Group built a global empire through strategic integration of legendary industrial brands.
Wolong has established advanced motor and drive control R&D centers in China, Europe, and Japan, complemented by a central research institute in Shanghai. This framework drives technology development in motors, drives, and control systems, ensuring that our products remain at the forefront of the industry.
The Wolong Group consolidates domestic brands like Nanyang Explosion (CNE) with globally recognized names like Brook Crompton, Morley, Laurence Scott, Schorch, and ATB, resulting in a robust market presence across oil & gas, petrochemical, and mining sectors.
In 2011, WOLONG acquired 97.94% of the Austrian ATB Group (ATB motor), one of the three major European motor manufacturers, establishing itself as a premier global motor manufacturer. ATB motor group includes Morley, specializing in mining applications, and Laurence Scott, known for low starting-current systems.
Morley’s 130-year heritage in underground coal mining is characterized by robust, high-performance designs. Laurence Scott, a pioneer in supplying motors for British nuclear power plants and generators for naval vessels, has earned the Queen's Award for three consecutive years.
Brook Crompton Motors, with over a century of experience in motor design and technology, is a key component of the Wolong Group. Known for energy-efficient designs, Brook Crompton offers a complete range of low, medium, and high voltage motors, including the Brook Crompton "W" and "10" series, engineered for harsh and hazardous environments.
Schorch, established in 1882, joined Wolong in 2011. Schorch provides robust drive systems to global projects in oil & gas, chemical processing, power generation, water treatment, shipbuilding, and tunnel applications.
For vibration motors (MVE) and Ex vibration sensors, the OLI brand maintains a significant global market share. Dating back to 1999, Wolong partnered with OLI in China to deliver specialized industrial vibration equipment.
In 2015, Wolong Electric Nanyang Explosion-proof Group Co., Ltd. (CNE), China's scientific research and production base for explosion-proof motors, integrated into the group. These explosion-proof, low voltage, and high voltage motors are widely used in oil, coal, chemical, metallurgy, electricity, and defense applications.
In 2018, General Electric (GE) Industrial Motors joined the Wolong Group. As a long-standing manufacturer of commercial and industrial electrical equipment, GE serves heavy industries such as oil and gas, petrochemicals, power generation, mining, metal processing, water treatment, and cement production. This acquisition brings extensive technology, engineering experience, and design support to the Wolong family.
From its origins in Shangyu, Wolong has grown to become a global leader in electric motor manufacturing, driven by continuous technology development and strategic brand integration.
To support global distribution, Wolong has secured international product certifications, streamlining integration into diverse markets.
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
ISO Quality Standards: Wolong operates as an ISO 9001-certified motor manufacturer. Compliance with ISO standards supports consistent quality management and operational efficiency, serving as a baseline for global trade and supply contracts.
NEMA Standards: To verify that our motors comply with NEMA mechanical performance specifications, we perform tests covering efficiency, insulation resistance, starting current, starting torque, durability, vibration, and noise. For low-voltage configurations, our motors carry UL and CSA approvals.
IECEx & ATEX Standards: For low and high voltage motors destined for explosive atmospheres, our products are certified under IECEx and ATEX standards, allowing straightforward entry and operation within European Union countries and other international jurisdictions.
TESTSAFE Standards: Meeting the requirements of TestSafe, a major coal mining equipment certification body, simplifies the supply of Chinese-manufactured mining motors to Australia and other major international mining markets.
A detailed inspection of the design elements that define Wolong's industrial motor quality.
Our rotors utilize a squirrel cage configuration, with cast aluminum rotors widely deployed. These components are produced using centrifugal casting or die-casting techniques, in which molten pure aluminum is poured into the rotor core slots. This creates a one-piece assembly integrating the rotor bars and end rings. This casting process supports structural stability and provides consistent starting torque characteristics.
For larger capacities, copper bar rotors are used, secured by robust bar design and end-ring brazing procedures. High-speed configurations also include protective retaining rings to maintain structural integrity during rapid acceleration and continuous duty cycles.
The stator coil is insulated with polyester film reinforced with glass cloth, using low-powder or medium-powder mica tapes with high mica content. Following coil insertion, the stator assembly undergoes the Vacuum Pressure Impregnation (VPI) process.
VPI introduces high-grade insulation resins deep into the core slots under vacuum and pressure, eliminating air pockets. This process yields a cured, resin-rich stator assembly with high dielectric strength, mechanical rigidity, moisture resistance, and thermal endurance (rated for Class F or Class H applications).
Our motor frames are engineered using a digital platform for structural and fluid multi-physics simulations. This simulation process helps optimize structural design, utilizing high-strength cast iron or fabricated steel to balance weight and rigidity.
The design includes generous safety margins for natural frequency isolation to minimize vibration resonances. These frames are structured to withstand mechanical shock loads and feature optimized cooling fins to maximize airflow heat dissipation, resulting in lower operational temperature rises and longer bearing lifetimes.
The low-noise ventilation system consists of an aerodynamically optimized fan cover body, an air guide cylinder, a protective window, and integrated silencer plates. Its compact, lightweight layout helps reduce vibration transmissibility.
By positioning the air inlet on the side, the system minimizes ventilation restriction from obstructions behind the motor, reducing aerodynamic noise and turbulence. Sound-absorbing materials within the hood absorb high-frequency fan noise. The system is rated to IP22, preventing accidental contact with rotating fan blades while maintaining cooling performance.
Wolong motors provide reliable drive power across major industrial sectors worldwide.
As a global manufacturer of motors and drive solutions, Wolong operates 39 manufacturing facilities and 4 research and development centers across China, Vietnam, the United Kingdom, Germany, Austria, Italy, Serbia, Mexico, and India.
Our motors drive industrial machinery such as ventilation fans, water pumps, process compressors, and mining equipment. These drives serve sectors including commercial HVAC, construction, oil and gas extraction, petrochemical refining, coal processing, metallurgy, thermal and nuclear power plants, marine propulsion, and industrial automation systems.
Professional answers to common engineering questions regarding flange and foot mounted industrial motors.
IM B3: This is a standard foot-mounted configuration. The motor frame features mounting feet to secure it to a baseplate, conveying torque along the shaft horizontally. It does not interface directly with the driven equipment via a flange.
IM B5: This is a flange-mounted design (without feet). The motor is supported and secured directly to the machine housing using a drive-end flange with clearance mounting holes.
IM B35: This configuration combines both designs, incorporating mounting feet and a drive-end flange. This setup is common in heavy-duty applications to support high radial and axial forces, ensuring shaft alignment in high-torque drives.
The VPI process places the wound stator in a vacuum chamber to remove air pockets and moisture from the insulation. A specialized solventless resin is then introduced under pressure, fully saturating the insulation layers.
This process cures into a solid mechanical structure that offers several benefits: 1. Improved heat transfer by eliminating insulating air pockets. 2. Protection against moisture, chemical dust, and carbon ingress. 3. Reduced mechanical movement of coils during startup, limiting the risk of short circuits.
Cast aluminum rotors, produced via centrifugal casting, integrate rotor bars, end rings, and cooling blades into a single piece. This design is cost-effective, reliable, and provides consistent starting torque characteristics suitable for general industrial applications.
For high-capacity, high-voltage, or high-speed motors, copper bar rotors are used. Copper's lower electrical resistance increases electrical efficiency. The copper bars are welded to the end rings using robust brazing methods and reinforced with retaining rings to withstand centripetal forces at high speeds.
Zone 1: An area where an explosive gas atmosphere is likely to occur in normal operation. Motors used here must employ flameproof (Ex d / Ex db) or increased safety (Ex e / Ex eb) protection concepts to prevent internal sparks from igniting external gases.
Zone 2: An area where an explosive gas atmosphere is not likely to occur in normal operation, and if it does, will persist for a short period only. Motors typically require non-sparking (Ex nA / Ex ec) or flameproof designs depending on local safety factors.
In continuous operations (such as 24/7 water supply, process ventilation, or refinery operations), energy costs represent over 90% of a motor's life cycle cost. Upgrading from IE3 to IE4 or IE5 reduces internal electrical losses, lowering power draw.
These motors run cooler due to reduced internal losses, which extends the service life of winding insulation and bearing grease, reducing downtime and maintenance costs.
Explore our second selection of industrial motors, featuring specialized explosion-proof, high-voltage, and marine drives.
NANFANG
