Engineered to withstand harsh environments with international explosion-proof and dust-proof certifications.
In modern industrial processes, the movement of dry bulk solids, powders, and granular materials presents unique hazards. The generation of combustible dusts, coupled with the presence of flammable gases, renders standard industrial vibrators obsolete. Explosion-proof vibratory motors are critical mechanical components designed to facilitate the smooth discharge, conveying, screening, and compaction of materials in locations classified as hazardous zones. Industries such as chemical processing, offshore oil and gas exploration, coal mining, and flour milling require drive systems that can safely generate centrifugal forces without presenting an ignition risk.
As regulatory oversight tightens globally through bodies such as the European Union (ATEX directives), the International Electrotechnical Commission (IECEx), and North American standards (UL and CSA), the demand for certified flameproof and increased-safety vibrators has experienced rapid growth. Heavy industries are transitioning away from high-maintenance pneumatic vibratory solutions to highly efficient, electrical solutions that integrate directly with variable frequency drives (VFDs) to offer precise material handling and substantial energy savings.
Driving global industry forward through decades of consolidation, innovation, and technological refinement.
Shaanxi Nanfang Motor Technology Co., Ltd stands as the premier authorized distributor of Wolong Electric Drive Group Co., Ltd. Founded in 1984, Wolong successfully entered the public market in 2002 (code SH600580). Over a trajectory spanning more than three decades, Wolong has established a presence as a global pioneer. The organization manages 3 key manufacturing bases, 39 state-of-the-art factories, and 3 global R&D centers.
Wolong’s strategic objective is centered on manufacturing advanced motors and control systems while executing a global brand strategy. This focus has enabled Wolong to secure leading market shares across international industries, serving as a trusted technology partner for hazardous location motor designs globally.
Unifying world-renowned engineering brands under one comprehensive industrial umbrella.
Wolong entered into strategic partnerships to supply and distribute OLI vibration motors (MVE) and Ex vibration sensors within China, laying the foundation for world-class vibration technologies and setting the benchmark for the largest market share globally.
Wolong acquired a 97.94% stake in the Austrian ATB Group, positioning itself as the actual controller of a top European motor manufacturer. This transaction integrated historic brands including Morley (130 years of underground mining experience) and Laurence Scott (famous for low starting current systems and naval defense generators).
Schorch, established in 1882, brought high-quality electric motor and driving system technologies to Wolong. Their industrial systems are used in tunnels, pipelines, offshore test stations, and chemical plants globally.
China's largest explosion-proof motor scientific research and production base joined Wolong, establishing a specialized hub for heavy-duty flameproof motors and positive-pressure shell machines.
Wolong acquired General Electric's (GE) commercial and industrial motor division. This acquisition merged GE's historical heavy-industry design practices (NEMA standards) with Wolong's lean manufacturing capability.
Providing custom engineering architectures that optimize efficiency, guarantee safety, and lower operational overhead.
Our explosion-proof vibrators and motors carry comprehensive global certifications, facilitating compliance with zone-specific rules worldwide (Zone 1, Zone 21, Class I Division 1, and Class II Division 1).
Leverage the latest IE3, IE4, and IE5 permanent magnet synchronous configurations. By combining these technologies with optimized variable-frequency operation, users achieve up to 30% reduction in electricity demand.
From micro-unbalanced motors for pharmaceutical hoppers to ultra-heavy high-voltage exciters for mining screens, our portfolio scales to meet diverse force requirements and mechanical configurations.
Examine the mechanical elements that ensure continuous performance in harsh, hazardous environments.
The rotor features a high-density squirrel cage configuration, utilizing cast aluminum structures engineered through advanced centrifugal casting or precision die-casting. This methodology guarantees a monolithic component, integrating the rotor bars and end rings to provide excellent torque capability and mechanical durability under fluctuating loads.
For high-capacity machinery, copper bar rotors are fabricated with specialized welding and securement schemes. A high-strength protective ring maintains balance during high-velocity rotation, protecting against mechanical deformation during high-frequency vibration.
The stator coil utilizes premium polyester film insulated wire wrapped in reinforced glass cloth. Specialized low-powder or medium-powder mica tape is applied, providing high dielectric strength.
The entire stator assembly is subjected to the Vacuum Pressure Impregnation (VPI) cycle, forming a solid insulation barrier that resists moisture penetration, aggressive chemical vapours, and structural degradation caused by continuous vibratory stress.
Our structural design leverages advanced multi-physics fluid and thermal simulation software to model mechanical stress and thermal profiles. Constructed from high-tensile cast iron (with steel alloy options), the frame features thick-ribbed construction that delivers structural stiffness.
This design isolates vibration energy and prevents housing resonance, allowing the mechanical force to be transmitted directly to the material handling machine while protecting internal bearings and stator coils from structural fatigue.
The acoustic management design incorporates a specialized fan cover body, structured air guide cylinder, protection window, and sound-absorption plates. By placing air inlet orifices laterally, the assembly reduces the risk of air blockages in confined locations.
The integration of composite noise-dampening elements lowers acoustic emission levels. The fan cover is rated at IP22, preventing contact with the rotating fan blades during maintenance operations.
Broad compliance credentials enabling direct deployment across international jurisdictions.
Certified for installation in Zone 1 (flammable gas atmospheres) and Zone 21 (combustible dust atmospheres) within the EU.
Complies with North American safety requirements for Class I Division 1 & 2 hazardous area installations.
Meets health, safety, and environmental protection standards within the European Economic Area.
Ensures conformity with China Compulsory Certificate protocols for explosion-proof machinery.
South African Bureau of Standards certification for safe application in African mining systems.
Provides compliance for underground coal mining and material handling installations in Australia.
By conforming to ISO 9001, NEMA standard mechanical profiles, and IECEx / ATEX flameproof specifications, Wolong's vibrators can be integrated into existing infrastructure. Testing processes, including insulation resistance checks, starter-torque loading, dynamic balancing, and vibration noise profiling, confirm that all manufactured units meet the requirements of international engineering projects.
How modern production facilities deploy specialized vibratory drive systems to automate workflow safety.
Powders, granules, and active pharmaceutical ingredients (APIs) tend to bridge or stick inside hoppers and transport systems. Certified Ex-proof vibrators prevent flow interruptions in areas where solvent vapours or fine dusts pose explosion hazards.
Used to feed raw ores and coal into crushing systems. With TESTSAFE and ATEX certifications, our vibrators operate safely in underground mines containing methane gas and highly combustible coal dust.
Applied to catalyst recovery systems, sulfur handling equipment, and wastewater filtration networks. Components are designed to resist corrosion from salt spray and aggressive acid environments.
Key Market Trends: Industry 4.0 is accelerating the integration of smart wireless vibration sensors (Ex-rated) that monitor temperature, amplitude, and bearing health. This transition from reactive maintenance to predictive analytics reduces unexpected downtime in hazardous areas. Additionally, the development of high-efficiency permanent magnet synchronous vibrator motors reduces electricity consumption, supporting corporate sustainability and decarbonization initiatives.
Adapting electrical drive systems for next-generation material handling technologies.
As industrial automation demands higher precision, the development of explosion-proof vibrators is transitioning toward variable-speed, multi-frequency system architectures. Over the next five years, the integration of digital control interfaces and adjustable unbalanced weights will become standard, allowing operators to dynamically modulate force outputs in real time via PLC systems.
Research is also focused on high-temperature superconducting windings and advanced lubrication systems that extend the operational life of bearings under continuous axial loads. These advancements will help ensure that material handling systems operate safely and reliably, even in extreme conditions.
Get answers to common queries regarding explosion-proof classifications, technical operation, and custom design options.
Heavy-duty, flameproof, and high-efficiency AC motors designed for industrial applications.
NANFANG
