Advanced low-voltage motors engineered for variable frequency operations, maximum efficiency, and absolute safety compliance in Class I & Class II hazardous environments.
The Greater Los Angeles metropolitan area stands as one of the most prominent industrial corridors in the United States. Characterized by the massive petrochemical facilities in Carson, Torrance, and El Segundo, the heavy marine logistics networks at the Port of Los Angeles and Port of Long Beach, and expansive wastewater treatment sites like the Hyperion Water Reclamation Plant, the region demands uncompromising safety compliance and high energy efficiency. Shaanxi Nanfang Motor Technology Co., Ltd. serves as a pivotal bridge, exporting world-class Wolong electrical machinery optimized for these rigorous operations.
Refineries and chemical plants handle highly volatile hydrocarbons, making explosion protection a baseline legal requirement. Motors operating in these zones must conform to strict National Electrical Code (NEC) Article 500/505 guidelines, securing UL 674 certifications for Class I, Division 1 & 2 environments (Groups C & D). Additionally, Southern California's strict environmental oversight, driven by the South Coast Air Quality Management District (SCAQMD) and California Energy Commission (CEC) Title 24, mandates that new and replacement motor designs satisfy NEMA Premium or IEC IE3/IE4 efficiency indices. Our low voltage explosion-proof AC motors are specifically configured to fulfill these parallel mandates, blending robust mechanical safety with low-loss core designs.
Procuring heavy electrical equipment in the US West Coast requires absolute predictability. Through the Wolong Electric Drive Group's expansive global footprints—which include 39 manufacturing factories, 3 primary R&D bases, and historic brand integration (such as Brook Crompton, ATB, and GE Industrial Motors)—we provide Los Angeles EPC contractors and end-users with unparalleled technological depth. Whether sourcing a standard NEMA frame motor or a custom-designed IEC variable frequency flameproof drive, our supply chains ensure certified quality, full traceability of materials, and long-term operating durability.
Authorized distributor of Wolong Electric Drive Group Co., Ltd. - Driving Global Industrial Progress Since 1984.
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.
How our specialized product portfolio addresses the safety-critical sectors of the modern global economy.
We provide multiple explosive atmosphere certifications. Our portfolio covers IEC standard flameproof (Ex d, Ex de) and NEMA standard Class I Div 1 / Class II Div 1 setups for global petrochemical corridors, ensuring compliance with local jurisdiction regulations.
Engineered to drastically cut power consumption. We offer high-efficiency asynchronous induction designs along with PM (Permanent Magnet) explosion-proof motor platforms, allowing facilities to satisfy local greenhouse gas emissions standards and lower operational overheads.
Our expansive inventory meets the unique requirements of varied sectors, including standard industrial pumps, deep-shaft mining conveyors, tunnel boring machinery, offshore drilling platforms, and marine cooling fans.
Inside the structural and thermodynamic designs that secure operating life under continuous heavy loading.
The core of our motor stator winding consists of high-quality polyester film combined with glass-cloth reinforced mica tape (either low-powder high mica content or medium-powder mica tape). This assembly undergoes the strict VPI (Vacuum Pressure Impregnation) process, transforming the bare coils into a solid, hermetically sealed structure.
This method prevents moisture entry, provides exceptional resistance to corrosive chemicals, and eliminates microscopic voids in the insulation. This minimizes insulation breakdowns and partial discharge issues when the motor is driven by high-voltage VFDs in hazardous gas zones.
Our squirrel-cage rotors are engineered to balance mechanical resilience and torque performance. We use high-grade centrifugal cast aluminum or precision die-cast aluminum for smaller, high-speed applications, forming integrated rotor bars and end-rings.
For heavy-duty, high-capacity industrial applications, copper bar rotors are utilized. Each copper bar is securely welded to the end rings using advanced induction brazing. High-speed rotors feature reinforcing containment rings to prevent centrifugal deformation during continuous operations.
The structural rigidity and heat dissipation surfaces of our motor frames are modeled using digital platforms combining structural stress and fluid-thermal multi-physics simulations. This ensures the frame design absorbs structural loads and mitigates dynamic vibration risks.
Constructed from high-strength cast iron or fabricated structural steel, the frames provide generous design margins to withstand external shocks, isolate resonant frequencies, and lower surface temperature rises under hot California ambient conditions.
Designed to comply with municipal noise rules and occupational safety laws, the ventilation system features an aerodynamic cover, integrated air guides, and specialized sound-dampening baffles. The physical air inlet is situated on the side, minimizing turbulence and reducing losses.
By incorporating sound-absorbing composite materials, we lower overall noise emissions. The system complies with IP22 standards to prevent physical contact with the fan blades, and options up to IP55 are available to keep out marine moisture.
Extending power and grid stability across complex industrial, municipal, and heavy mining networks.
How integration of legendary European and American manufacturers created our global technology base.
In 2011, Wolong acquired 97.94% of the Austrian ATB Group, positioning itself as a major European electric motor designer. The ATB portfolio includes the Morley brand, which has provided heavy-duty underground coal mining motors for over 130 years, and Laurence Scott, a developer of low starting-current motors for power stations and naval generators.
Brook Crompton brought over a century of electric motor design expertise to the group. Known for energy-efficient development, they pioneered the premium Brook Crompton "W" and "10" series, providing durable drive options for hazardous, corrosive, and chemical processing facilities worldwide.
Established in Germany in 1882, Schorch joined Wolong in 2011. The company specializes in high-output drive packages for oil and gas projects, chemical complexes, large-scale municipal water systems, shipping lines, and heavy steel processing operations.
In 2015, Nanyang Explosion Protection Group (CNE), China's largest research and production base for flameproof machinery, joined Wolong, strengthening our capability to manufacture explosion-proof and safety-increased drive configurations.
In 2018, General Electric (GE) Industrial Motors joined the group. GE's experience in heavy industries like oil and gas processing, mining, and pulp-and-paper mills provides substantial support to Wolong's design capabilities.
Our manufacturing processes are certified to meet international standards for safety and reliability.
Nemko / ATEX
CSA
CE
CCC
SABS
TESTSAFE
Visualizing the manufacturing processes that define our low-voltage explosion-proof machinery.
A complete selection of low-voltage flameproof and dust-ignition-proof motors designed for challenging industrial conditions.
Clarifying standard certifications, structural choices, and regional compliance requirements for heavy industrial drives.
Class I, Division 1 motors are designed for environments where ignitable gases or vapors are continuously or periodically present during normal operations. Class I, Division 2 motors are used in areas where volatile gases are only present during accidental system ruptures or abnormal ventilation conditions. Division 1 motors require robust containment designs (flameproof enclosures), while Division 2 motors may use non-sparking mechanical layouts depending on standard certifications.
Yes, specialized models like the WEBP3 and YBBP series are designed for VFD operation. They include safety-insulated windings (using VPI treatments) and options for insulated bearings or shaft grounding devices to manage high-frequency voltage spikes and bearing currents. The motor's nameplate must indicate certification for variable frequency operation, defining the speed range and torque profile.
Our motor range includes models designed to meet NEMA Premium efficiency and IEC standards up to IE4 and IE5. These models are engineered to comply with rules like California Energy Commission Title 24, helping local petrochemical and water reclamation facilities reduce energy use and carbon footprints.
VPI ensures the stator windings are completely sealed against moisture, dust, and corrosive chemicals. It removes air voids within the winding structure, preventing localized electrical discharges. This maintains dielectric performance and helps extend the operating life of the motor in harsh chemical environments.
NEMA frames use imperial measurements, whereas IEC frames use metric measurements. While their footprints and shaft sizes differ, we offer specialized conversion designs and standard metric-to-imperial frame adaptations (like the NEXP series) to allow drop-in replacements in diverse industrial facilities.
Through our authorized distribution networks, we offer application engineering, custom frame design coordination, documentation for local building inspections, and international transportation support for deliveries to California sites, ports, and industrial parks.
Speak directly with our technical application specialists. Get custom configuration support, CAD drawings, and comprehensive quotes for your next project.
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