Engineered for extreme reliability, our high and low-voltage industrial AC motors comply with rigorous ATEX, IECEx, and NEMA specifications.
Flange-mounted electric motors represent a critical segment of industrial motor design, engineered specifically for direct-drive and mechanical coupling applications where alignment precision and space optimization are paramount. Unlike standard foot-mounted configurations, flange-mounted motors feature a precise structural mating ring (flange) on either the drive-end (DE) frame cover or the output shaft interface. This mechanical layout ensures that the motor shaft aligns coaxially with the driven load—such as gearboxes, high-pressure fluid pumps, axial fans, and heavy-duty industrial compressors—minimizing radial runout and reducing mechanical stress on bearings.
By leveraging standardized mounting configurations, globally recognized as IEC B5 (D-flange), IEC B14 (C-face), and their respective North American equivalents in the NEMA standard (C-face and D-flange), industrial designers can execute direct structural integrations. As a leading OEM Flange Mount Electric Motor Supplier & Factory, we deliver engineering flexibility that combines robust casting designs with state-of-the-art winding technology to withstand extreme loads and harsh ambient conditions.
Shaanxi Nanfang Motor Technology Co., Ltd. is the official authorized distributor of Wolong, partnering directly with the Wolong Electric Drive Group Co., Ltd. Wolong, founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (stock code: SH600580), has cultivated a global manufacturing and development system over nearly four decades.
Today, Wolong's industrial architecture boasts 3 primary global manufacturing bases, 39 advanced manufacturing factories, and 3 localized research and development (R&D) centers. Operating with an uncompromising vision of technology integration, Wolong remains at the forefront of the global motor market, providing industry-leading design, thermal optimization, material efficiency, and localized engineering support.
Through our close alliance, Shaanxi Nanfang Motor supplies global procurement managers with customized OEM flange-mounted motor solutions backed by Wolong's comprehensive global supply chain safety net.
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Core Patents
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Combining world-class materials, deep manufacturing optimization, and unmatched logistical pathways.
Our proximity to high-grade silicon steel mills and primary copper refiners guarantees consistent electromagnetic core properties. This dynamic allows our factories to lock down material costs and ensure motor stator laminations meet strict low-core-loss performance criteria.
With 39 specialized production factories, we seamlessly switch lines from highly standardized low-voltage motor batches to complex, project-driven high-voltage flange-mount motors. This scale decreases lead times significantly compared to traditional European suppliers.
Every motor leaves the factory floor only after surviving digital multi-physics test beds. Dynamic balancing, stator insulation leakage testing under high voltage, and vibration spectrum testing are fully integrated into our standard operating procedures.
How Wolong synthesized centuries of motor expertise to establish a leading design matrix.
In 2011, Wolong acquired a 97.94% stake in the Austrian ATB Group, one of Europe's top three motor manufacturers. This major integration consolidated high-end engineering capabilities, directly absorbing ATB's heavy-duty electrical designs, which now empower our high-voltage non-sparking and flameproof motors.
Boasting a 130-year legacy in underground coal mining equipment, Morley has become a global synonym for reliability in hazardous mining environments. The Morley brand represents heavy-duty structural integrity, designed to withstand the highest levels of vibration and shock load.
Pioneering low starting current motors for critical British nuclear power applications and naval operations, Laurence Scott's technology allows us to supply massive electrical machines that reduce starting stress on vulnerable grid systems.
Joining the Wolong group brought Brook Crompton's energy-efficiency design heritage (Brook "W" and "10" series) and Schorch's heavy-duty system experience (since 1882) directly into our current product design methodologies. These brands are highly trusted across global petrochemical and steel sectors.
For high-frequency vibration motors and industrial Ex-proof vibration sensors, Wolong partnered with OLI to secure the largest global market share. This collaboration underpins our ability to deliver highly specialized dynamic motors.
In 2018, Wolong acquired the commercial and industrial division of General Electric (GE) Motors. Bringing GE's deep engineering standards and heavy industry designs (cement, paper, water treatment) into the Wolong system solidified our capability to address NEMA-certified projects in North America.
Discover our engineered solutions designed to minimize energy consumption and protect operations in explosive environments.
We provide a comprehensive range of explosion-proof certificates tailored to your local legal jurisdictions. Whether you operate in ATEX Zone 1/21 in Europe, IECEx global zones, or CU-TR (EAC) regions in Eurasia, our flange-mounted motors ensure maximum containment safety.
To reduce total cost of ownership (TCO) and support carbon neutrality, we offer low-voltage AC and Permanent Magnet Synchronous Motors (PMSM) that exceed IE4 and IE5 efficiency limits. These systems ensure massive electricity savings over decades of continuous service.
We offer customized shaft geometries, dynamic speed adjustments via Variable Frequency Drives (VFDs), specialized flange dimensions (both standard and tailored to legacy machinery footprint), and chemical-resistant paint coatings to withstand offshore environments.
Standardized verification protocols that allow our motors to pass seamlessly across global borders.
Nemko / ATEX
CSA Standard
CE Directives
CC Mark
SABS Approved
TESTSAFE
Adhering to a comprehensive, vertically integrated global marketing strategy, Wolong has secured premium product certifications, giving our clients a reliable path to entering the world's most regulated markets:
A closer look at the advanced internal components that define the lifecycle of a Wolong motor.
Our rotors incorporate a low-loss squirrel cage topology. Cast aluminum rotors are produced using centrifugal aluminum casting or pressure die-casting methods, integrating the rotor bars and end rings into a solid, high-durability core. For larger high-voltage flange-mount motors, copper bar rotors are utilized, using silver-alloy brazing and end ring containment rings. High-speed rotors are dynamically balanced to ISO G1.0/G2.5 specifications, minimizing mechanical vibration and preserving bearing life.
Our stator windings use high-purity copper conductors wrapped with corona-resistant polyester film and glass cloth reinforced mica tapes. The completely wound stator assembly undergoes a computerized Vacuum Pressure Impregnation (VPI) treatment using solventless resins. This treatment yields a rock-solid, moisture-proof winding structure with outstanding dielectric strength, superior heat dissipation, and long-term chemical resilience.
Using digital multi-physics and structural finite element analysis (FEA), our motor frames are cast from high-strength cast iron (or fabricated steel for heavy custom frames). The design offers massive structural stiffness, thermal cooling fins, and optimized resonant frequency margins. This rigidity prevents deformation at the flange mounting face, preserving bearing and shaft alignment under high external torque loads.
The low-noise ventilation system consists of an aerodynamic fan cover, a balanced unidirectional or bidirectional fan, air guides, and optional silencer plates. The air inlet paths are optimized to reduce turbulent flow noise while maintaining high cooling airflow. Rated to IP22/IP55, the hood prevents contact with rotating blades while optimizing overall acoustic pressure levels.
A showcase of our global manufacturing capability, assembly lines, and testing equipment.
Our motors are tailored to perform in sectors where downtime means millions in lost revenue.
Working on refineries, pipelines, and gas processing facilities means operating around volatile gases. Our flange-mount ex-proof designs integrate directly with centrifugal pumps and gas compressors, ensuring no external ignition risks under ATEX Zone 1/2 environments.
Underground mining drives need to withstand dust, moisture, and high impact. The YBU/YBUS/YBUD tunnel boring motors, built on Morley's robust coal mining engineering, are heavily reinforced to resist the stress of boring through hard rock.
Based on Laurence Scott nuclear supply standards, our large flange-mount induction motors are optimized for high inertia loads. They provide critical pumping functionality with low starting currents, avoiding voltage drops in the auxiliary grid.
Get answers to critical engineering, installation, and procurement questions from our technical support team.
Designed for heavy industries requiring exceptional starting torque under severe loads.
NANFANG
