Engineered for absolute reliability under high-load, hazardous, and deep-submersion operations.
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.
To establish itself as the premier designer and manufacturer of high-efficiency industrial motors and drives, Wolong has strategically integrated several global historical leaders in the electric machine sector. This gives Wolong unmatched technology and access to specialized global market applications:
Acquired in 2011 (97.94%), ATB is one of the three major European motor manufacturers. It includes the highly specialized brands Morley (mining) and Laurence Scott (low starting current, nuclear power station motors, and naval marine generators).
A venerable brand with over a century of experience in motor design. Brook Crompton is a global leader in high-efficiency motor concepts, manufacturing the "W" and "10" series for harsh industrial and hazardous environments.
Established in 1882, Schorch provides premium driving systems for petrochemicals, oil and gas, and wastewater. OLI holds the largest global market share in vibration motors (MVE) and Ex vibration sensors.
China's largest research and production base for explosion-proof motors joined Wolong in 2015, reinforcing Wolong's absolute dominance in coal mine, oil, and gas explosion-proof motor applications.
Integrated in 2018, GE's commercial and industrial motor division brings over a century of heavy industrial application design knowledge, supporting Wolong's global reach in material processing and heavy steel manufacturing.
How local supply chain clusters, strict quality verification, and custom OEM manufacturing drive down Total Cost of Ownership (TCO).
Our domestic factories leverage deep clusters of electrical steel (silicon steel) manufacturers, copper winding processors, and high-precision casting hubs. This integration ensures shorter production lead times, even for bespoke high-voltage submersible designs, without compromising raw material quality.
Chinese OEM plants are equipped with industrial-grade Vacuum Pressure Impregnation (VPI) setups, dynamic balance testers, and full underwater test pools. Each submersible motor undergoes rigorous hydrostatic sealing tests and insulation tests under simulating operating depth conditions.
We configure submersible motors exactly to your pipeline size, flow requirements, and geological conditions. From specialized double mechanical seals (Silicon Carbide vs. Tungsten Carbide) to integrated PT100 temperature sensors and moisture leakage detectors, we adapt every unit to fit your specifications.
Inside look at the structural components that define Wolong's superior reliability in harsh industrial operations.
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.
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.
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.
Inside Wolong's state-of-the-art manufacturing plants dedicated to precision motor engineering.
Our comprehensive electric drive portfolio covers motors meeting the needs of different industries and hazardous areas. The engineered designs excel in a wide array of mission-critical applications:
Reliable operations in offshore platforms, subsea pumping, refinery cooling loops, and pipeline distribution. Explosion-proof certification (ATEX/IECEx/EAC) guarantees safety in hazardous vapor zones.
Heavy-duty flameproof motors for slurry pumps, conveyors, underground ventilation fan systems, and drainage pumps. Designed to survive mineral-heavy, highly abrasive underwater settings.
High-efficiency submersible pumps for flood control, wastewater treatment plants, deep-well extraction, and high-pressure municipal distribution networks with optimized power conservation.
Meeting international entry barriers with accredited, laboratory-tested compliance standards.
Nemko / ATEX
CSA
CE
CC
SABS
TESTSAFE
Adhere 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.
Modern global engineering procurement departments look beyond unit costs. Today, buying high-efficiency submersible motors requires compliance with strict criteria and aligning with development trends:
With tightening environmental mandates globally, the standard requirement has shifted from IE3 to IE4/IE5 permanent magnet motor technology. PM motors offer substantial savings on electrical overheads, particularly at variable speeds.
Modern submersible platforms require integrated sensors to measure stator temperature, vibration frequencies, and mechanical seal integrity, feeding data directly to SCADA systems for predictive maintenance.
Demands for corrosion-resistant pump housings (AISI 316, Duplex steel) are rising to meet the challenges of brackish seawater and high-acidity industrial mining drainage environments.
Authoritative insights from our engineering division regarding motor selection and maintenance.
Heavy-duty options including permanent magnet synchronous, low voltage explosion-proof, and flameproof conveyors motors.
NANFANG
