Explore our leading range of high-efficiency low-voltage and high-voltage Ex-proof three-phase induction drives.
Shaanxi Nanfang Motor Technology Co., Ltd. is the official authorized distributor of Wolong. Wolong Electric Drive Group Co., Ltd. was established in 1984 and listed on the Shanghai Stock Exchange in 2002 (code SH600580). Over its decades of evolution, Wolong has consolidated its footprint to include 3 major manufacturing bases, 39 advanced factories, and 4 dedicated R&D centers globally.
By prioritizing a unified global brand and technology integration, Wolong leads the industrial drive sector in product design, thermal simulation, production precision, and robust distribution systems. Our services span critical hazardous sectors including Oil & Gas, Mining, Chemical, and Heavy Machinery.
Strategic analysis of low voltage explosion-proof motor procurement criteria, compliance factors, and supply chain demands.
Global operations require modular motor designs that fit both standard metric IEC configurations and North American NEMA frames. OEM factories must offer versatile dual-stamped nameplates, enabling multi-regional project approvals without redundant designs.
Beyond capital expenditure, energy efficiency classes (IE3, IE4, and IE5) determine long-term operational costs. Modern chemical plants and mining enterprises prioritize high-efficiency permanent magnet motors that reduce power consumption in continuous duty (S1) profiles.
Procuring agencies require comprehensive verification of flameproof protection (Ex d, Ex db), increased safety (Ex e, Ex eb), non-sparking (Ex nA, Ex ec), and dust ignition protection (Ex tb, Ex tc). Continuous traceability of raw materials and strict casting inspection are non-negotiable.
Our global engineering service addresses the fragmentation of international standards. By integrating certified explosion-proof topologies with customizable mechanical extensions, we provide direct drop-in replacements for standard NEMA and IEC footprint motors, reducing engineering review timelines by up to 40%.
Tailored motor drive systems designed to withstand harsh operating environments and high-risk applications worldwide.
Wolong's portfolio is engineered to mitigate explosion risks in environments where combustible gases, vapors, or dust are constantly present. Each motor series is optimized for its thermal and chemical environment:
Wolong has strategically integrated world-class motor brands, creating an intellectual property powerhouse for specialized drives.
Wolong's acquisition strategy has brought legendary industrial electric motor brands under one unified technical umbrella:
A leading European motor designer, ATB includes specialized sub-brands such as Morley (underground mining flameproof drives with 130 years of history) and Laurence Scott (custom low-starting-current solutions and naval nuclear plant drives).
A pioneer in premium energy-efficient motor designs. Known for the high-efficiency W-Series, providing reliable drive systems in hazardous environments.
Founded in 1882, Schorch sets the standard for heavy-duty drive systems in the global petrochemical, pipeline, gas storage, and shipbuilding sectors.
Incorporating GE's commercial and industrial motor business (2018) and China's largest explosion-proof research base, Nanyang Explosion Group (CNE, 2015), creating a global powerhouse for explosive atmosphere machinery.
Premium materials and engineering simulation systems ensure safe operation in hazardous atmospheres.
Features a robust squirrel-cage design. Uses centrifugal casting or pressure die-casting for pure aluminum integration. For heavy duty and high-output configurations, welded copper bars with high-speed retention rings prevent thermal distortion.
Windings are insulated using polyester film-reinforced glass cloth and high-mica-content tapes. The complete stator assembly undergoes Vacuum Pressure Impregnation (VPI), providing protection against moisture, dust, and vibration.
Designed using digital fluid and multi-physics structural simulation tools. Cast from high-tensile cast iron or welded steel plates, the frames offer high heat dissipation, mechanical shock resistance, and low vibration levels.
Features an integrated air guide cylinder, protection screens, and silencer plates. The side-entry air inlet design avoids blockages and reduces aerodynamic noise. Complies with IP22 standards to prevent physical contact.
Wolong motors comply with international quality, safety, and explosion protection regulations.
Provides a standardized manufacturing framework. Wolong implements systematic quality tracking, design reviews, and trace reports, which helps simplify international trade clearance.
In addition to standard performance checks, our motors undergo safety and structural evaluations. For the North American market, low-voltage designs carry UL and CSA listings.
TestSafe certification allows our explosion-proof coal mining drives to enter the Australian market and other Commonwealth regions requiring specialized coal dust compliance.
Our commitment to efficiency, variable frequency control, and industrial Internet of Things (IIoT) solutions.
The industrial drive landscape is shifting toward connected, high-efficiency systems. Our R&D roadmap focuses on three main developments:
From petrochemical processing to underground mining, our systems provide safe and reliable drive solutions.
Reliable drive systems for pipeline pumps, offshore platform compressors, gas storage facilities, and processing plants. High-strength housings resist corrosion in saline marine environments.
Heavy-duty, flameproof motors designed for shearers, scraper conveyors, and continuous mining equipment. Resists methane gas and explosive coal dust mixtures.
Supplying high-efficiency explosion-proof drives for large-scale industrial ventilation blowers, municipal water pumps, fire safety pumps, and cooling systems.
Practical engineering answers to common technical, regulatory, and mechanical questions from global procurement teams.
Ex d (Flameproof): The motor enclosure can withstand an internal explosion of an explosive mixture and prevent the transmission of the explosion to the surrounding atmosphere. This is common in Zone 1 applications.
Ex e (Increased Safety): Design measures are applied to prevent high temperatures, arcs, or sparks from occurring on internal or external parts of the motor during normal operation. Used in Zone 2 or Zone 1 applications.
Ex nA (Non-sparking / Ex ec): Similar to standard industrial motors but designed to minimize the risk of arcs or sparks during normal operation. Typically limited to Zone 2 environments.
Variable Frequency Drives (VFDs) introduce high-frequency voltage spikes (dV/dt) and can cause additional rotor heating at low operating speeds due to reduced fan cooling. Ex-proof motors running on VFDs must be thermal-performance certified, using integrated winding RTDs or thermistors linked to safe-disconnection switches. Using water-cooled motor designs, like the WOLONG YBBP series, helps maintain stable operating temperatures across a wide speed range.
Yes, provided the motor carries dual markings or is certified to meet NEMA performance ratings (such as torque characteristics, insulation class, and service factors). Mechanical modifications—including shaft configurations, flange adapters, and conduit box locations—can be applied by our OEM facility to match NEMA configurations.
Standard maintenance includes checking flamepath clearances, verifying shaft seal integrity, checking IP55/IP66 enclosure gaskets, and monitoring bearing temperature profiles. Only certified service shops should handle internal maintenance to prevent compromising the flameproof enclosure.
All load-bearing and pressure-retaining motor frames undergo non-destructive testing (NDT), including ultrasonic checks, magnetic particle tests, and hydrostatic pressure testing at 1.5 times the maximum design pressure. This ensures the frame can contain an internal explosion without fracturing.
Explore our specialized brushless synchronous, permanent magnet, and positive pressure motor configurations.
Get in touch with Shaanxi Nanfang Motor Technology Co., Ltd. for technical specifications, sizing inquiries, or quotation requests for Wolong's explosion-proof motor product lines.
We provide comprehensive design support, including customized drawings, electrical models, and thermal evaluation files.
Official Distribution Office: Shaanxi Nanfang Motor Technology Co., Ltd.
Global Technical Network: 39 Manufacturing Facilities, 4 dedicated R&D Centers
Our application engineering team will review your specifications and provide a response within one business day.
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