Explore our premium industrial-grade explosion-proof, flameproof, and high-efficiency AC/PMSM motors, tested to international standards for safety and reliability.
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 in 2002 (code SH600580). After more than 30 years of development, Wolong has 3 manufacturing bases, 39 factories, and 3 R&D centers worldwide now. Wolong has always focused on the manufacture of motors and control systems, committed to a global brand strategy, making Wolong a leader in R&D, technology, process, manufacturing and sales in the global market.
Our integration combines unparalleled domestic capability with a robust framework of internationally renowned legacy engineering brands, delivering safety and drive innovation to key global markets in oil, gas, petroleum, marine, and mining industries.
Engineered to mitigate risk, optimize electrical performance, and fulfill stringent regulatory requirements in global markets.
Different kinds of Ex certificates for your industry and market including ATEX, IECEx, CU-TR (EAC), CSA, UL, and SABS compliance.
IE5/IE4/IE3 standards available, also providing variable frequency and permanent magnet synchronous motor (PMSM) types.
Rich product line covering low voltage and high voltage motors designed to meet the exact demands of harsh and hazardous areas.
Combining over a century of European & American motor technology mastery to provide high-performance OEM hazardous duty motors.
Wolong has established motor and drive control R&D centers in China, Europe, and Japan, and established a central research institute in Shanghai. It is committed to the research of leading technologies in the field of motor and control technology. Some products have reached the international leading level, bridging local supply chain advantages with top-tier global technical standards.
In 2011, WOLONG company acquired strong technical and technological support by successfully purchasing 97.94% of the Austrian ATB Group (ATB motor), one of the three major European motor manufacturers. This established Wolong as a world-renowned global motor manufacturer, adding legacy brands like Morley in the mining industry and Laurence Scott to the portfolio.
Morley motor, with its nearly 130-year history, has been closely linked to underground coal mining, becoming synonymous with durability and safety. Laurence Scott, renowned for designing low starting current motors, has long-supplied nuclear power plants and generators for British naval vessels. Following its acquisition by WOLONG, Laurence Scott was honored with the Queen's Award for three consecutive years.
Brook Crompton Motors stands as a venerable and profoundly skilled participant within the electric motor sector, boasting over a century of mastery in technology and design. They have developed a complete range of low, medium, and high voltage AC motors, including the premium Brook Crompton "W" and "10" series suitable for operation in hazardous and harsh environments, coupled with user-friendly adjustable speed drive packages.
Schorch (established 1882) joined Wolong in 2011, setting the standard for oil, gas, chemical, power generation, and water management drive systems. In parallel, OLI Brand has owned the largest market for vibration motors and Ex vibration sensors globally. WOLONG joint ventured with OLI in China in 1999 to supply MVE vibration systems worldwide.
In 2015, WOLONG Electric Nanyang Explosion-Proof Group Co., Ltd. (CNE), China's largest explosion-proof motor scientific research and production base, merged with WOLONG. In 2018, General Electric (GE) industrial motor division partnership joined WOLONG. These moves optimized high-end engineering configurations, strengthening OEM support for heavy industries globally.
A deep look into the structural simulation, materials, and processes that define the safety and efficiency margins of Wolong hazardous duty motors.
The rotor features the squirrel cage design, with cast aluminum rotors being widely utilized. These rotors are produced using either centrifugal aluminum casting or die-casting techniques, where molten pure aluminum is poured into the slots of the rotor core, resulting in a single-piece construction that integrates the rotor bars and end rings.
The structural integrity and manufacturing process of cast aluminum rotors guarantee the motor rotor's reliability, and also endow the motor with outstanding torque properties. For larger capacity motors, copper bar rotors are employed, which benefit from dependable bar securing and end ring welding procedures. Additionally, the protective ring design of high-speed motors further ensures the reliable operation of the copper bar rotor.
The coil is crafted from polyester film and reinforced with glass cloth, utilizing either low-powder mica tape with a high mica content or medium-powdered mica tape with an abundance of mica. Following the VPI (Vacuum Pressure Impregnation) process, a pristine white coil emerges from the production line.
After the billet is extracted from the wire, it proceeds through the VPI process to transform into a finished unit. The winding and insulation are meticulously engineered to provide exceptional electrical performance, mechanical strength, resistance to moisture, and thermal stability in chemically corrosive environments.
The motor frame employs a fully digital platform for structural and fluid multi-physics field simulations. This simulation platform retains the original patent's structure and design, utilizing mature, high-strength cast iron (or steel as an alternative).
The frame boasts exceptional structural redundancy, outstanding heat dissipation properties, and ample inherent frequency isolation margins for the entire machine. It is engineered to endure significant mechanical shocks, maintain a superior vibration level, and ensure a lower temperature increase in the motor, preventing surface hot-spots in hazardous areas.
The low-noise fan cover system comprises a fan cover body, an air guide cylinder, a protective window, and a silencer plate. Its compact structure and lightweight design facilitate vibration reduction.
The air inlet is situated on the side, which optimizes the avoidance of obstacles behind the motor, minimizing adverse effects on ventilation and reducing noise caused by energy loss during propagation path changes. The system also incorporates sound-absorbing materials that absorb noise, thereby lowering the overall motor noise. Additionally, the fan cover is rated IP22, ensuring that hands cannot come into contact with the fan.
How we leverage integrated Chinese manufacturing capabilities and global local compliance testing to optimize procurement costs and speed up deployment.
Operating out of state-of-the-art Chinese manufacturing facilities allows us to achieve massive economies of scale. We utilize vertically integrated processing, from in-house casting and stator winding to automated CNC rotor turning, reducing lead times by up to 30% compared to Western competitors.
We work directly with major certification bodies like Nemko, CSA, DNV, and SABS. Through our TESTSAFE-approved laboratory setups, we conduct flameproof gap measurements, thermal rise testing under fault conditions, and IP rating tests in local environments, streamlining regional approvals.
We ensure that our motors fit seamlessly into regional applications. Our customized OEM designs accommodate differing shaft dimensions, terminal box orientations, mounting feet configurations, and cooling requirements (IC411, IC416, etc.) requested by engineers worldwide.
Adhering to the comprehensive marketing strategy for the electric motor and the entire industry chain: WOLONG has secured the majority of product certifications, enabling it to penetrate the international market.
ISO Standard Compliance: WOLONG is an ISO 9001 Ex motor manufacturer. The ISO standard has evolved into a critical gateway for businesses to surmount international trade barriers and penetrate global markets. It is a fundamental prerequisite for WOLONG to engage in production, business operations, and trade. Qualified with ISO9001 certification (International Organization for Standardization), WOLONG's motors and equipment are trustworthy and dependable.
NEMA Standard Compliance: To confirm that WOLONG's electric motors meet NEMA's mechanical performance specifications, we conduct thorough testing, which includes efficiency, insulation resistance, starting current/torque, durability, vibration, and noise testing. For low-voltage motors, WOLONG successfully acquired the UL (Underwriters Laboratories) and CSA (Canadian Standards Association) certificates.
IECEx and ATEX Standards: For low & high-voltage motors and explosion-proof motors, WOLONG has acquired the IECEx and ATEX certificates. This allows our partners to seamlessly export and install motors in European countries (EU) and Zone-classified hazardous locations.
TESTSAFE Standard: Testsafe is the largest coal product certification body in the Southern Hemisphere. The acquisition of Testsafe has opened the channel for Chinese coal mining motors to enter Australia and other global mining sectors, further enhancing the international influence of WOLONG's integrated coal mining equipment.
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
Expert insights for procurement officers and engineering directors selecting hazardous duty motors for specific industrial applications.
In oil refineries and chemical processing facilities, volatile gases (Group IIA, IIB, IIC) are a constant presence. Our motors (like the WEBP3 and YBX4 series) feature robust flameproof enclosures (Ex d / Ex de) engineered to contain any internal explosion, preventing ignition of the surrounding atmosphere.
Mines require high mechanical resilience due to dust and methane accumulation (Group I applications). The YBK3 and YBS series conveyor motors are designed with high-strength cast-iron frames, specific cooling configurations, and Testsafe certification to guarantee continuous performance under high mechanical shock.
Salt mist, moisture, and high vibration call for marine-certified motors. Our YQ series features DNV Type Approval, using offshore-grade anti-corrosive coatings, IP56 or higher ingress protection, and anti-condensation heaters to ensure reliable operation on offshore rigs and vessels.
When selecting an OEM manufacturer for hazardous duty electric drives, procurement directors must evaluate the Total Cost of Ownership (TCO) beyond the initial purchase price. Key components of TCO include:
WOLONG's diverse range of motors finds application across a multitude of industrial sectors, serving equipment such as fans, water pumps, compressors, and engineering machinery.
As a globally esteemed manufacturer of motors and drive solutions, WOLONG boasts 39 manufacturing facilities and 4 research and development centers (R&D centers) across various countries including China, Vietnam, the United Kingdom, Germany, Austria, Italy, Serbia, Mexico, India, and so forth.
Our motors are integral to various industries, including:
WOLONG's mission is to deliver optimal solutions and services to our customers through technological innovation and strict compliance management.
Motor Assembly Hall
Winding Process Control
Full Load Performance Testing
Warehouse & Logistics
Stay ahead of the curve with insights on technological integration and the global shift toward decarbonization and safety automation.
Global regulations are moving rapidly toward ultra-high efficiency standards. Permanent Magnet Synchronous Motors (PMSMs) are replacing traditional induction motors due to their higher efficiency at partial loads, significantly reducing operational emissions in chemical and mining projects.
Modern plant managers demand real-time diagnostics. Integrating Ex-rated vibration sensors and winding temperature detectors directly onto the motor frame allows for predictive maintenance, drastically reducing the risk of catastrophic failures in hazardous areas.
Variable Frequency Drives (VFDs) are increasingly used to control speed and torque, optimizing energy consumption. This requires motors with specialized stator insulation (like VPI processed mica tape) to handle high frequency voltage spikes without degradation.
Get answers to common technical queries about hazardous duty motors, certification standards, and engineering specifications.
Complete your facility configurations with our range of flameproof conveyor induction motors, non-sparking HV motors, and ultra-high-efficiency systems.
NANFANG
