Explore our advanced catalog featuring CE, ATEX, and IECEx certified electric motor systems designed for Zone 1, Zone 2, Group I, and Group II applications.
In modern industrial facilities, safety and operational efficiency are paramount. The global explosion-proof electric motor market is undergoing massive changes due to stricter environmental regulations, safety standards, and the rapid expansion of hazardous-area processing plants. Industrial environments containing volatile gases, flammable vapors, combustible dust, or fibers require robust drivetrains that mitigate risk.
Choosing the correct drive system is not just about power delivery. It is a critical risk mitigation strategy. Our CE-certified explosion-proof motors are designed to conform to the highest safety classifications, providing uncompromising reliability, high efficiency (up to IE4 and IE5), and low total cost of ownership (TCO) across global markets.
Our engineering architecture optimizes air circulation and electromagnetic configurations. These systems prevent internal electrical sparks or thermal runaway from igniting the surrounding explosive atmosphere. This is key for critical sectors including oil & gas, offshore drilling, marine propulsion, chemical synthesis, and underground mining operations.
Combining localized industrial expertise with global R&D resources and manufacturing scale.
Shaanxi Nanfang Motor Technology Co., Ltd. is the authorized global distributor of Wolong. Wolong Electric Drive Group Co., Ltd., founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (code SH600580), has established itself as a world-leading manufacturer in motor and control drive systems. With 3 global manufacturing bases, 39 manufacturing factories, and 3 state-of-the-art research and development centers worldwide, Wolong delivers advanced drive solutions globally.
Through strategic international acquisitions, Wolong has integrated a family of century-old industrial brands. This group includes names like ATB (Austria), Brook Crompton (UK), Morley (UK), Laurence Scott (UK), Schorch (Germany), OLI (Italy), and the General Electric (GE) Industrial Motor division. This combined capability offers unmatched design diversity, manufacturing capacity, and global certification compliance.
Acquired in 2011, ATB is one of Europe's top three motor manufacturers. Within ATB, Morley possesses nearly 130 years of history in underground coal mining drives. Morley is synonym of quality and power under harsh mine environments worldwide.
Laurence Scott is famous for low starting current designs and nuclear power plant drives. Schorch, founded in Germany in 1882, designs heavy-duty drive systems for petrochemical and oil & gas projects globally.
Brook Crompton leads in high-efficiency design (premium "W" series). Wolong's acquisition of General Electric (GE) Commercial and Industrial division in 2018 added huge capability in heavy-duty design for hazardous environments.
Engineered to comply with stringent safety criteria across Europe, the Americas, Asia-Pacific, and Africa.
For explosion-proof systems, compliance certificates represent the primary barrier to entry. Wolong has obtained the major global certifications, allowing smooth integration into international engineering projects.
ATEX
CSA
CE
CCC
SABS
TESTSAFE
Under the hood of Wolong's explosion-proof mechanical structures.
Our rotors utilize squirrel cage configurations. Centrifugal cast aluminum rotors are commonly deployed, which integrate the rotor bars and end rings into a solid, unified structure. This manufacturing method minimizes dynamic imbalances and improves torque characteristics during high thermal loads.
For larger capacity, high-voltage motors, welded copper bar rotors are used. These feature special securing designs to handle thermal stress. The high-speed rotor profiles include retaining rings to prevent distortion under high centrifugal forces, ensuring long-term bearing and shaft durability.
The core electromagnetic stator winding features high-grade polyester films reinforced with glass cloth and high-mica-content tapes. The stator assembly undergoes a computerized Vacuum Pressure Impregnation (VPI) process using solventless epoxy resin.
This creates a void-free structure with excellent moisture resistance, high mechanical strength, thermal stability (Class F/H), and insulation reliability. This VPI process is essential for high-voltage motors to prevent partial discharges under variable load profiles.
The motor enclosure is designed using digital multi-physics simulation tools. Using high-tensile cast iron or fabricated steel, the frames provide generous mechanical margins. This ensures structural strength, efficient heat dissipation, and natural frequency margins that prevent resonance.
The robust frame resists high internal pressure from explosions without deformation, preventing gas escape through joint paths. This capability forms the core safety basis for flameproof (Ex d) motors.
Operating sound safety is key for modern plants. Our low-noise fan cover system integrates an aerodynamic guide cylinder, protective mesh window, and acoustic silencer elements. The side-entry air inlet design optimizes flow routing around obstructions, reducing power-loss noise.
Using sound-absorbing lining materials, the motor's operating noise is reduced. The system meets IP22 protection ratings to prevent foreign objects or personnel from touching the rotating fans during operation.
Tailoring explosion-proof electric drive configurations to specific operating environments.
For extraction fields, drilling platforms, and refineries, gas vapors like methane, butane, and hydrogen present constant hazards. We supply YZYKS series positive pressure shell and YB3 flameproof motors to handle these environments.
Underground coal mining involves coal dust and methane hazards. The YBSS series and YBC series shearer cutting motors are built to withstand falling rock impacts, heavy dust, and moisture in tunnels.
For engine cooling, bilge pumping, exhaust fans, and tunnel ventilation, our YBF series flameproof fan motors and marine duty systems offer corrosion-resistant housings and seawater protection.
Our roadmap focuses on IE5 efficiency, permanent magnet systems, and integrated variable frequency speed control.
Industrial operations consume significant energy. Motors and drive systems account for over 60% of total electrical usage in a typical plant. Shifting towards higher efficiency standards is key to reducing emissions and operational costs.
Our TBVF series permanent magnet explosion-proof synchronous motors offer key advantages:
Unplanned downtime in a refinery or chemical facility can cost hundreds of thousands of dollars per hour. Our future roadmap integrates digital condition monitoring into explosion-proof enclosures.
By using intrinsically safe sensors on our motors, operators can monitor vibration levels, winding temperatures, and bearing wear in real time. This data feeds into plant control systems to enable predictive maintenance and prevent unexpected failures.
Detailed answers regarding technical specifications, certifications, and application engineering.
Flameproof (Ex d): The enclosure can withstand an internal explosion of a flammable gas mixture. It prevents the transmission of internal flames to the surrounding explosive atmosphere through engineered flame paths.
Increased Safety (Ex e): Focuses on prevention. It incorporates measures to prevent sparks, arcs, and excessive temperatures from occurring on internal parts under normal operation and specified overload conditions.
Yes. Motors like our YVF series and TBVF series are designed specifically for VFD operation. They feature insulated non-drive end bearings to prevent shaft currents and are thermal-tested to ensure safe operation across their speed ranges, including at low speeds with high torque loads.
Integrating ATB, Morley, Laurence Scott, and Schorch design archives within Wolong allows us to offer specialized motors. This includes low-starting-current machines, underground mining drives, and heavy positive-pressure systems under a single certified manufacturing framework.
Positive pressure (Ex p) motors, like the YZYKS and YZYKK series, maintain an internal pressure of protective gas (clean air or inert gas) higher than the external atmosphere. This prevents combustible gases from entering the enclosure, allowing standard non-explosion-proof components to operate inside safely. This design is common for high-voltage, large-capacity motors.
Our range includes permanent magnet synchronous motors, mining conveyor drives, high-temperature fans, and specialized marine propulsion equipment.
NANFANG
