In modern oil and gas extraction, petrochemical refining, and heavy mining infrastructure, the electric motor acts as the vital mechanical muscle. Specifically, horizontal gas motors—referring to horizontally-mounted electric motors constructed to drive compressors, pumps, and fans in gaseous, flammable, and dust-hazardous environments—require the highest engineering safeguards. Stability, vibration dampening, thermal resilience, and explosion protection are not merely performance metrics; they are absolute mandates for operational survival.
China has transitioned from a high-volume manufacturing center to a global leader in high-specification, specialized motor design. Operating under stringent international frameworks including IECEx, ATEX, NEMA, and local standards, leading manufacturers are pushing the boundaries of material science, electromagnetic modeling, and digital diagnostics. Shaanxi Nanfang Motor Technology Co., Ltd., in partnership with the globally renowned Wolong Electric Drive Group, serves as the pivotal engineering and supply gateway providing these advanced systems to heavy industries worldwide.
Complete compliance with global explosion-proof directives. Designed with positive pressure shells (Ex p), flameproof casings (Ex d), and non-sparking structures (Ex nA) to eliminate ignition risks in Class I, Div 1 & 2 zones.
Ultra-efficient designs adhering to IEC IE4 and IE5 efficiency thresholds. By utilizing permanent magnet technologies (WEPM) and variable frequency controls (VFD), energy losses are cut by up to 30%.
Engineered for high-vibration applications. High-grade structural cast iron or reinforced steel frames ensure deep structural redundancy and a wide margin of isolation from structural natural frequencies.
Shaanxi Nanfang Motor Technology Co., Ltd. is the authorized global distributor of Wolong Electric Drive Group Co., Ltd. founded in 1984 and listed on the Shanghai Stock Exchange in 2002 (code SH600580). Over four decades of calculated engineering growth, Wolong has established a global footprint containing 3 manufacturing bases, 39 advanced manufacturing plants, and 3 premier R&D institutions worldwide. The brand is dedicated to redefining precision motor manufacturing and drive control architectures.
Wolong's global leadership is fortified by the strategic integration of legendary century-old motor brands. By acquiring these industry cornerstones, Wolong has unified European precision, American standardization, and Chinese manufacturing scale.
Acquired in 2011, ATB is one of Europe's top three motor manufacturers. Within ATB, Morley represents nearly 130 years of history in high-performance underground coal mining motors, recognized worldwide as the benchmark for heavy-duty flameproof designs.
As the specialized brand that supplied electric motors to British nuclear stations and generator systems to navy vessels, Laurence Scott is renowned for low starting currents and high reliability, securing the Queen's Award for three consecutive years.
With over 100 years of mastery, Brook Crompton has spearheaded the development of low, medium, and high-voltage AC motors. Their flagship "W" and "10" series lead the industry in adjustable speed drive systems for harsh environments.
Since 1882, Schorch has defined high-power driving systems. Working within chemical plants, gas transmission pipelines, and major shipbuilding projects, Schorch motors are built to handle high torque dynamics and severe loads.
Partnering with Wolong since 1999, OLI dominates the global industrial vibration motor and Ex-proof sensor landscape, optimizing bulk material handling across diverse process industries.
As China's largest R&D and production base for explosion-proof motors, CNE integrated with Wolong in 2015. It forms the backbone of Chinese-engineered high-voltage ex-motors for petro, chemical, and nuclear installations.
In 2018, GE's commercial and industrial motor division entered a deep strategic alignment with Wolong. This partnership provides access to century-old American standard NEMA motor manufacturing techniques for severe-duty applications.
The global shift toward green hydrogen transmission requires safety profiles that prevent ignition in Group IIC hydrogen environments. Our R&D path focuses on positive pressure purge systems (Ex pz/pxb) that maintain inert gaseous environments inside horizontal motor casings.
The future of industrial horizontal motors lies in digitalization. Wolong is integrating localized vibration, temperature, and magnetic flux sensors directly on frame casting points. This data connects to edge computing nodes, enabling predictive maintenance schedules and minimizing unscheduled downtime.
To withstand continuous operation under high-frequency harmonics from VFDs, the new technical insulation route incorporates corona-resistant enamel wires paired with VPI (Vacuum Pressure Impregnation) using advanced Class H epoxy resins.
Horizontal gas motors operate at the core of critical infrastructure. Selecting the correct motor relies heavily on matching electrical characteristics with the fluid dynamics of the driven application.
Large-scale gas transmission pipelines require high-speed, horizontally foot-mounted motors configured to run 24/7/365 under unstable power grid conditions. Our high-voltage non-sparking (YWKK) and flameproof series are engineered to handle high torque starting demands while maintaining minimal thermal rise to protect close-coupled gas compressors.
In refining facilities, the environment is saturated with volatile hydrocarbons. Wolong's explosion-proof variable frequency motors (YBBP) regulate flow rates in pump systems, adjusting speeds dynamically to process pressures while maintaining ATEX/IECEx Zone 1 flameproof integrity.
Operating in narrow galleries filled with coal dust and methane, space limitations dictate low-profile, highly robust designs. The YBSS and YBS series flameproof motors are built with water-cooled jackets and specialized dual-shaft arrangements to support massive conveyor starting torques.
Offshore oil platforms must withstand extreme salinity, moisture, and potential gas leaks. The DNV-type approved YQ series marine motors offer IP56 high-integrity ingress protection, marine-grade protective paint cycles, and anti-condensation heating elements to handle rapid temperature variations.
Industrial motor reliability is determined in the manufacturing plant. Wolong's Factory 4.0 production bases implement advanced industrial automation and strict quality control measures to ensure that every motor meets global standards.
Insulation failure is a primary cause of stator breakdown. Wolong's vacuum pressure impregnation facilities utilize automated cycles to ensure bubble-free resin coating across stator coils, offering superior dielectric strength and moisture protection.
Horizontal motors must maintain low vibration limits (often exceeding ISO 10816 standards). Our rotors undergo dynamic balancing using computerized high-speed test rigs to ensure minimal residual imbalance, prolonging bearing and mechanical seal lifetimes.
By managing the supply chain for raw copper, electrical steel laminations, and heavy-duty frame casting within the Wolong Group, we insulate international buyers from supply chain shocks, ensuring on-time delivery for large engineering contracts.
Operating across different regulatory environments requires deep compliance engineering. Global procurement divisions must identify the exact standard frameworks required for their specific region.
Nemko / ATEX
CSA
CE Compliance
CCC Standards
SABS Approved
TESTSAFE
The rotor features a squirrel cage design, with cast aluminum construction widely utilized. These rotors are produced using centrifugal casting or high-pressure die-casting, where molten pure aluminum is poured directly into the slots of the rotor core. This results in a single-piece construction that integrates the rotor bars and end rings, delivering outstanding starting torque and structural durability. For high-capacity high-voltage setups, copper bar rotors are used, secured by specialized welding procedures and protective high-speed retaining rings to prevent radial distortion.
Coils are wrapped in glass-reinforced polyester film paired with high-content mica tapes. Following the VPI process, the stator turns into a solid, moisture-resistant assembly. The winding layout and insulation are designed to withstand electrical surges, moisture, and high thermal loads.
The frame structure is simulated using advanced structural and fluid multi-physics platforms. Utilizing high-strength cast iron (or fabricated steel options), it provides structural redundancy, efficient heat dissipation, and natural frequency isolation margins. This layout minimizes operating vibration and dampens impact loads.
The ventilation system integrates an air guide cylinder, a protective mesh window, and acoustic dampening panels. Side air inlets optimize airflow around obstacles, reducing energy losses and acoustic levels. The fan system meets IP22 protection limits, preventing accidental contact during operation.
A horizontal gas motor refers to a foot-mounted (B3 or B35 configuration) industrial motor designed to drive compressors, fans, or pumps in gaseous or chemical processing environments. Unlike standard motors, these systems incorporate strict explosion-proof designs (Ex d, Ex p, or Ex n) to prevent igniting surrounding flammable gases.
Our drive systems carry certifications including ATEX, IECEx, CSA (for North America), CU-TR (EAC for Eurasian customs unions), SABS (South Africa), and Australia's TESTSAFE. This ensures compliance with local safety standards in various regions.
Yes. We design and build motors with custom shaft ends, thrust bearing configurations, and special mounting configurations to match existing compressor footprints or custom machine designs.
VPI replaces manual varnishing with a vacuum process that pulls moisture out of the stator windings and injects insulating resin deep into the gaps. This prevents partial discharges, improves heat transfer, and protects the motor against humidity, chemicals, and vibration.
Our permanent magnet motors achieve energy-saving performance levels matching IE4 and IE5 standards, helping facilities lower power usage under varying speed controls.
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