As a prominent enterprise in the industry, Shaanxi Nanfang Motor Technology Co., Ltd. serves as the authorized global distributor for Wolong Electric Drive Group Co., Ltd. (founded in 1984, listed on the Shanghai Stock Exchange in 2002 under ticker SH600580). Over the span of four decades, Wolong has solidified its global presence through systematic scale expansions and engineering acquisitions, establishing 3 major manufacturing bases, 39 state-of-the-art factories, and 4 international research and development centers.
By integrating premier manufacturing processes with control systems, Shaanxi Nanfang Motor Technology provides global heavy industries with comprehensive motor drive packages. Wolong’s development roadmap features a global brand strategy, optimizing design paradigms to match rigorous industrial expectations across continents.
Explosion-proof motors operate under severe environmental conditions where combustible gases, vapors, or dust are consistently present. The fundamental engineering philosophy involves preventing an internal ignition or flame propagation from breaching the motor frame. Shaanxi Nanfang Motor Technology Co., Ltd. addresses these challenges through custom-engineered industrial solutions.
Our explosive motors possess comprehensive globally-aligned explosion protection credentials (including Ex d, Ex de, Ex e, Ex nA, and Ex tb). This ensures seamless compliance with international health and safety mandates for major mining and petrochemical complexes.
Aligning with standard electric motor mandates worldwide, our product lineup spans IE3, IE4, and IE5 ultra-premium efficiency ratings. Our permanent magnet synchronous motors (PMSM) offer energy savings, reducing operating costs in high-demand, continuous industrial applications.
Our solutions encompass low-voltage, medium-voltage, and high-voltage three-phase asynchronous and synchronous motors, coupled with matching variable speed drive systems, configured to suit specific hazardous area classifications.
Wolong's status as a global pioneer in electric drive technology is bolstered by the strategic integration of legendary European and American motor brands. Each acquisition has infused the group with specialized engineering assets and IP, resulting in a cohesive product portfolio.
Wolong acquired a 97.94% stake in the Austrian ATB Group, positioning the company among the leading European motor manufacturers. The ATB portfolio includes prestigious brands with long histories:
China's largest explosion-proof motor research and manufacturing base, CNE (Nanyang Explosion-proof Group Co., Ltd.), joined the Wolong Group. This integration consolidated domestic research capabilities and scale, supporting applications across national defense, chemical engineering, metallurgy, and nuclear power.
Wolong partnered with GE’s commercial and industrial motor division, integrating GE's engineering heritage in heavy industrial processes, oil & gas extraction, and pulp and paper manufacturing into the company's technical lineage.
Through acquisitions like Brook Crompton, Wolong has expanded its range of high-efficiency "W" and "10" series low-voltage motors. Additionally, partnerships with OLI Vibration (established in China since 1999) have established Wolong as a leading global manufacturer of vibration motors (MVE series) and Ex-certified vibration sensors.
Explosion-proof motors require precise mechanical and electrical engineering. Here we detail the key structural components of Wolong's product lines:
Our rotors feature a robust squirrel-cage design. For standard operations, high-purity cast aluminum rotors are manufactured using centrifugal casting or advanced die-casting, forming a single-piece construction that integrates the rotor bars and end rings to provide reliable torque. In high-power high-voltage systems, copper bar rotors are used, featuring reinforced end-ring welding and carbon fiber/alloy containment rings on high-speed configurations to prevent centripetal deformation.
Stator coils are constructed from premium polyester film reinforced with high-density glass cloth and wrapped in low- or medium-powder mica tape. The assembled stator undergoes a computerized Vacuum Pressure Impregnation (VPI) process. This seals the windings in epoxy resin, providing resistance to moisture, chemical corrosion, and mechanical vibration, while ensuring Class F (or Class H) thermal durability.
The motor casing and end-shields are designed using multi-physics simulation platforms, optimizing heat dissipation and structural strength. Cast from high-grade grey cast iron (or fabricated steel), the frame offers structural redundancy, keeping vibration levels low and containing any internal ignition pressure within the flameproof joints.
Comprising an aerodynamic steel cover, air guide cylinder, protective window, and acoustic silencer plate, our IP22-rated fan systems minimize energy loss and noise emissions. The side-inlet design optimizes air flow, even when installed in tight spaces or against walls, preventing backpressure issues.
Sourcing explosive motors from our advanced factories in China offers global EPC (Engineering, Procurement, and Construction) companies and end-users distinct benefits:
Unlike fragmented assemblers, our factories integrate the entire manufacturing cycle. From copper wire drawing and stator punching to casting, machining, VPI, and multi-load dynamometer testing, every step is managed in-house to ensure quality control.
We operate high-voltage testing bays and explosion-simulation labs capable of conducting full-load performance tests on large machines up to 10MW. This allows us to verify power factor, temperature rise, and vibration characteristics under real-world conditions prior to shipping.
Located near deepwater shipping terminals, our facilities ensure reliable access to raw materials and prompt container shipping. Our supply agreements for electrical steel and copper protect customers from price volatility and lead-time extensions.
To serve hazardous industries internationally, Shaanxi Nanfang Motor and Wolong maintain a comprehensive portfolio of safety certifications. These certificates facilitate compliance with national regulations and lower barriers to project approvals.
Nemko / ATEX
CSA Group
CE Mark
China Compulsory
SABS South Africa
TESTSAFE Australia
Our factories operate under ISO 9001 quality management guidelines optimized for explosion-proof equipment. Every production batch is fully traceable, from heat numbers on major castings to electrical batch testing records.
For markets in North America, we verify our motors against NEMA electrical and mechanical specifications, including locked-rotor torque and breakdown torque standards. Low-voltage models are certified by UL and CSA for safe operation in Class I, Division 1 and 2 areas.
For projects in the European Union and international markets adhering to IEC standards, we offer complete motor ranges with ATEX and IECEx certificates. This allows our products to be directly installed in Zone 1, Zone 2, Zone 21, and Zone 22 gas or dust environments.
The acquisition of TESTSAFE certifications—the premier coal safety standard in the Southern Hemisphere—helps facilitate the entry of Wolong’s underground mining motors into the Australian and broader Oceanian resource markets.
Wolong's motor designs are customized to meet the operational demands of several hazardous and heavy-duty industries:
In refineries, offshore drilling rigs, and downstream polymer processing lines, explosive hydrocarbon gases are constant presence. Our motors (such as the YZYKK positive-pressure shell models and WEBP3 variable-frequency series) power high-capacity pump systems, gas compressors, and ventilation blowers safely.
Methane gas accumulation and explosive coal dust require the use of robust flameproof machinery. Models like the YBK3 series and the Morley mine motors are designed to withstand physical impacts, extreme moisture, and acidic water, and are used to drive armored face conveyors (AFCs), coal cutters, and ventilation fans.
Tunneling processes release pocketed underground explosive gases. The YBU, YBUS, and YBUD series tunnel boring machine flameproof motors provide high torque in compact footprints, with cooling water systems that help manage operating temperatures.
When procuring explosive motors, global engineering teams must balance safety classifications, mechanical duty cycles, and lead times. This guide helps streamline that integration process:
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