Explore our premium selection of low and high voltage Ex d flameproof asynchronous & permanent magnet motors.
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 on the Shanghai Stock Exchange in 2002 (code SH600580).
With over 35 years of continuous industrial evolution, Wolong boasts 3 global manufacturing bases, 39 state-of-the-art factories, and 3 global R&D centers. Empowered by a robust international brand strategy, Wolong stands out as a world leader in R&D, control technologies, high-precision manufacturing, and global sales channels.
LEARN MOREWhy leading EPC contractors and heavy industries choose Wolong Ex d flameproof motors.
Engineered to comply with stringent explosion-proof safety codes globally, offering dual/triple certifications (ATEX, IECEx, CU-TR/EAC, TestSafe) tailored for volatile oil, gas, and coal mining environments.
Available in premium ultra-high efficiency models (IE4, IE5, and variable frequency PM synchronous motor types) to slash operating expenses (OPEX) and reduce global industrial carbon footprints.
Combining the heritage of century-old industrial motor brands under one roof, meeting the exact standards of diverse hazard zone operations from Zone 1 to Zone 22.
Wolong has unified motor and drive system R&D centers in China, Europe, and Japan, establishing a central research institute in Shanghai. The resulting technological synergy guarantees that our explosion-proof motor product range surpasses conventional thermal efficiency limits and sets new industry benchmarks.
Through strategic acquisitions of legendary global motor manufacturers, Wolong has combined top-tier European & American engineering with competitive Chinese manufacturing scale.
Acquired in 2011. Morley, boasting 130 years of history, stands as the premier brand in harsh underground coal mining environments, synonymous with rugged flameproof reliability.
Famous for nuclear-grade safety, supplying high-performance naval generators and low starting current medium/high voltage motors for hazardous heavy duty installations.
A century-old pioneer in highly energy-efficient electric motor engineering, offering standard low-voltage adjustable speed drive packages for explosion-hazardous atmospheres.
Established in 1882, setting the gold standard for high-power hazardous duty drives in international oil & gas, metallurgy, water management, and shipbuilding pipelines.
A joint business powerhouse since 1999, specializing in Ex-certified industrial vibration motors, holding the largest global market share in structural dynamic excitation.
Merged in 2015. As China's largest scientific research and manufacturing base for flameproof machinery, it supplies key sectors like petroleum, aerospace, and nuclear power.
Integrating GE's legendary commercial and industrial motor division in 2018, bringing advanced thermal modeling and heavy-industry motor engineering to Wolong's global base.
Encompasses 39 state-of-the-art factories worldwide, delivering cross-continental supply-chain redundancy and localized customer service offices across 58 nations.
Explore the high-fidelity internal engineering that distinguishes our Ex d flameproof three-phase electric motors.
The rotor features a rugged squirrel cage design. Cast aluminum rotors are produced using centrifugal casting or advanced high-pressure die-casting techniques. The molten pure aluminum is poured into the slots of the rotor core, creating a single-piece construction that integrates the rotor bars and end rings.
For high-capacity, high-voltage configurations, copper bar rotors are utilized, using premium bar securing and end-ring induction welding procedures. The custom protective ring layout on high-speed Ex d motors keeps the copper bar assembly dynamically stable at extreme RPMs.
The coil is crafted from high-grade polyester film reinforced with glass cloth, using low-powder mica tape with a high mica content. Following the VPI (Vacuum Pressure Impregnation) process, a pristine white coil insulation structure is formed.
This thermal and mechanical treatment offers absolute resistance to moisture ingress, chemical corrosion, and high thermal stress (Class F/H insulation ratings), maximizing winding life under repetitive starting loads.
The motor frame employs a fully digital engineering platform for multi-physics structural and fluid thermal simulation. Using mature, high-tensile strength cast iron (with structural steel available as an option), our frames deliver excellent mechanical rigidity and heat dissipation.
Designed with generous inherent frequency isolation margins, it easily handles heavy mechanical shock and keeps motor vibration levels well below standard limits.
Our low-noise fan cover system consists of a fan cover body, air guide cylinder, protective window, and silencer plate. Its compact structure and lightweight design minimize operating vibration.
An innovative side-entry air inlet bypasses obstacles behind the motor, reducing aerodynamic drag and noise. Fitted with sound-absorbing materials and rated IP22, the fan guard keeps operators safe while keeping temperatures low.
Ex d motors fully certified to meet the regulatory requirements of different hazardous industrial zones worldwide.
Nemko / ATEX
CSA
CE Mark
CCC Ex
SABS
TestSafe
ISO 9001 Ex Manufacturing: Our production bases implement strict ISO 9001 protocols. This systematic quality assurance ensures that every flameproof joint, path gap, and mechanical seal matches our approved drawings.
NEMA Standards: For American markets, we test motors to NEMA MG1 standards, covering starting currents, insulation resistance, torque, and vibration. Our low-voltage ranges carry UL and CSA markings.
IECEx and ATEX Standards: Dual certifications are standard for our flameproof lines, simplifying installation in EU Zone 1 and Zone 2 environments.
TESTSAFE Standard: Certified by TestSafe, the largest safety authority in the Southern Hemisphere, our mining-duty motors have open access to the Australian mining market, establishing Wolong as a trusted supplier globally.
The global industrial explosion-proof motor market is shifting toward highly efficient, durable designs that meet stringent safety standards. Chinese factories, led by Wolong's advanced facilities, combine robust supply chains, state-of-the-art automation, and direct access to rare earth permanent magnets.
This supply chain advantage makes China the premier sourcing hub for high-efficiency Ex d motors, offering short lead times and custom configurations for complex global engineering projects.
Our localized manufacturing capabilities allow us to customize shaft sizes, mounting footprints, and terminal boxes to drop into existing oil & gas systems, reducing plant downtime.
Integrating electric drive technology into heavy industrial processes.
Ex d IIC T4 motors optimized for high-pressure pumps and gas compressors. Engineered to contain internal hydrocarbon explosions and prevent propagation in hazardous refining environments.
Ex d I Mb motors constructed with reinforced steel frames and copper-rotor components to withstand abrasive dust, moisture, and high starting-torque loads in coal conveyors.
High-efficiency YBX5 and YFB3 motors designed with chemical-resistant paint and stainless-steel hardware to ensure reliable operation in corrosive environments.
Technical answers to help engineers, EPC buyers, and procurement specialists make informed decisions.
Complete your project configuration with our specialized high-voltage and variable frequency motor ranges.
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