OEM IEC Hazardous Area Motors Factory & Industrial Solutions

High-Performance, Explosion-Proof & Multi-Classification Electric Drivetrains for Critical Global Applications

Premium High-Voltage & Explosion-Proof Drivetrains

Explore our core engineering portfolio of IEC-compliant high and low voltage industrial motors designed for ultimate performance and reliability.

Y2 Series Compact High Voltage AC Motor
China Y2 series compact structure high voltage AC motor Manufacturers, Factory
Compact High Voltage AC Induction
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High Voltage Soft Start State Cabinet
Custom High voltage soft start state cabinet Manufacturer, Suppliers
Soft Start Control Custom Panels
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YE5 IE5 Three Phase Ultra Premium Efficiency Motor
Discount YE5 IE5 Three Phase Ultra Premium Efficiency Motors Manufacturers, Factory
IE5 Ultra Premium Low Carbon Footprint
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T Series Large Three-phase Synchronous Motor
Discount T Series Large Size Three-phase Synchronous Motor Suppliers, industrial
Synchronous Motor Heavy Industry
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Z Series Large DC Motor
Custom Z series large DC motor Company, Factories
Heavy DC Drive Rolling Mills
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YFB3 Dust Explosion-Proof Motor
China YFB3 series Dust explosion-proof three-phase asynchronous motor Factories, industrial
Dust Ignition Proof Zone 21 / Zone 22
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Z4 Series DC Motor
OEM Z4 series DC motor Manufacturers, Factories
Precision DC Control Extruder Duty
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SIMO Factory Infrastructure and Industrial Facility

Macro Industrial Drivetrain Engineering

In the modern industrial layout, safety compliance and operational continuity are the twin pillars of profitable operations. Modern chemical plants, oil refineries, and offshore platforms operate under volatile atmospheres where gas, vapors, and combustible dust present persistent explosion hazards. Designing electric drivetrains for these harsh environments requires a meticulous understanding of IEC standards and thermodynamic isolation methodologies.

As a global partner to major EPCs and industrial developers, Xi’an Lite SIMO Motor Co., Ltd. (LITESIMO) provides custom-engineered OEM solutions that bridge the gap between regulatory stringency and operational efficiency. By leveraging over six decades of advanced mechanical design, our motors guarantee stable performance under high thermal stress and corrosive environments.

1955
Established
60+
Years of R&D
260+
Engineers
1800+
Varieties

Six Decades of Innovation: Xi’an Lite SIMO Motor History

From a state-owned pioneering enterprise to a leading mechanical engineering group driving international industrial systems.

Founded in 1955, SIMO Motor has navigated the evolution of electrical machine manufacturing in China and the global stage. Headquartered in the ancient industrial hub of Xi'an, the company ranks in the top tier of China’s motor manufacturing sector. Today, SIMO maintains a robust capital foundation of 21.5 million RMB, managing fixed assets valued at 380 million RMB.

With 3 production sites and 1 auxiliary plant covering over 1,200 employees, our factory features 1,172 sets of high-grade machining and testing machinery. Our R&D department is driven by 260 technical engineers, featuring 21 senior engineers and 15 state-level expert engineers, specializing in customized motor solutions.

1955
SIMO Motor established as a key enterprise under state guidance.
1957 - 1966
Relocated to a dedicated plant in Xi'an and formally named Xi'an Motor Factory after structured acquisitions.
1999 - 2006
Reformed into a limited liability company, established SIMO Motor Group with 14 subsidiaries, and moved to high-tech industrial parks.
2009 - 2019+
Rebranded to Tech Full Simo Motor, driving industrial progress into low-carbon, smart VFD, and ultra-high voltage motor systems.

Product & Design Capability

Our core capabilities span 34 major product series, over 1,800 varieties, and 19,500 electrical/mechanical specifications, offering a output range from 0.35kW up to 25,000kW. Main production lists include:

  • YX, YXKK, YXKS Series: High-efficiency, high-voltage induction motors.
  • YR, YRKK, YRKS Series: Slip-ring wound rotor high-voltage motors.
  • YE3, YE4, YE5 Series: Premium, super-premium, and ultra-premium IE5 low-voltage systems.
  • YVFE3, YVFE4, YVFE5 Series: Variable frequency and variable speed drives.
  • YBX3, YBX4, YBX5 Series: Explosion-proof motors for hazardous locations.
  • T, TD, TK, TDMK Series: Large synchronous motors.
  • Z2, Z4, and Z Series: Industrial DC motors.

Historical Plant Galleries

Explosion Protection Methodologies: Ex d, Ex e, Ex nA, Ex t

Understanding the mechanical and thermal isolation standards defined by IEC 60079 for explosive atmospheres.

Flameproof Enclosure (Ex d)

Designed to withstand internal explosions of flammable gas mixtures without propagating the ignition outward. Ideal for Zone 1 and Zone 2 application scopes. Features robust cast-iron frames, long joint paths, and minimal flame gaps.

Increased Safety (Ex e / Ex eb)

Focuses on eliminating hot spots, sparks, and electrical arcs by using high-quality insulation materials, specialized cable entries, and precise temperature-rise margins during start-up.

Dust Ignition Protection (Ex t)

Utilizes tight dust-exclusion enclosures (IP65 or IP66 rating) to limit surface temperatures. Specifically engineered to prevent combustible dust clouds (e.g., starch, coal dust, grains) from finding an ignition source.

Global Standards Comparison: NEC vs. IEC

Industrial motors intended for hazardous areas must align with localized installation codes. While North America traditionally follows the National Electrical Code (NEC) Class/Division framework, Europe and global operations utilize the IECEx / ATEX zone model.

Our OEM motors are built on the IEC standard framework (IEC 60079 series) to allow simple cross-border project design. A Zone 1 gas group classification aligns with Class I Division 1 parameters, whereas Zone 2 operations align with Class I Division 2. By ensuring multi-standard compliance, SIMO allows project developers to utilize unified mechanical designs globally.

Target Application Scenarios

Specialized drivetrains optimized for demanding settings in oil & gas, mining, chemistry, and bulk handling.

1. Oil & Gas Refining (Gas Hazard Zone 1 & 2)

Refineries and petrochemical pipelines are prone to gaseous atmospheres containing ethylene, hydrogen, or hydrocarbons. For these installations, the YBX4 flameproof motor series provides a reliable solution. Featuring a spark-free terminal box design and heavy-duty frame casting, it mitigates risk in volatile environments.

2. Underground Coal Mining (Firedamp Hazards)

Underground mines contain flammable coal dust and methane. The YBK3 flameproof motor series is custom-built for conveyors, shearers, and ventilation fans, featuring thick cast-iron construction to withstand mechanical impact and prevent electrical sparking.

3. Grain Handling & Milling (Dust Hazard Zone 21 & 22)

Grain silos and agricultural storage units manage dust that can become explosive when mixed with air. The dust explosion-proof YFB3 and YFB4 series restrict external temperatures and use high-grade IP65/IP66 ingress protection to prevent dust entry.

4. High-Torque Power Plant Vent Systems

High-volume primary air fans and boiler feed pumps require large-scale high-voltage induction or synchronous motors like the YXKK or TFW series. These are designed for continuous duty (S1), optimized start-up profiles, and compatibility with variable frequency drives.

Global Quality Certifications

SIMO maintains rigorous compliance verification systems, securing international accreditations for demanding safety frameworks.

We manage internal production flows under ISO9001 Quality System Certification parameters. Our explosion-proof and standard motor designs carry approvals including European CE, American UL, Russian GOST, and others.

SIMO Certification Document 1
SIMO Certification Document 2
SIMO Certification Document 3
SIMO Certification Document 4
SIMO Certification Document 5
SIMO Certification Document 6
SIMO Certification Document 7
SIMO Certification Document 8
SIMO Certification Document 9
SIMO Certification Document 10
SIMO Certification Document 11
SIMO Certification Document 12

Technical Roadmap & Future Outlook

Our vision for next-generation drivetrains focuses on efficiency, smart diagnostics, and safety for demanding applications.

IE5 Ultra-Premium Efficiency

With global energy regulations tightening, our R&D roadmap focuses on expanding our YE5 (IE5) efficiency solutions. Utilizing advanced electromagnetic field simulation software, we minimize rotor loss, reducing operating temperature and carbon emissions.

Integrated Smart Diagnostics

The integration of Ex-certified vibration and temperature sensors allows for real-time monitoring of bearings and stator windings. By analyzing thermal anomalies and signature vibrations, operators can perform predictive maintenance before failures occur.

Hydrogen Economy Compatibility

As green hydrogen production scales, handling systems require motors certified for gas group IIC. We are upgrading our flameproof enclosures to handle hydrogen gas environments, meeting new industry demands.

Hazardous Area Motors FAQ

Addressing key engineering inquiries regarding classifications, operations, VFD pairing, and maintenance.

Q1: What is the primary design difference between a standard industrial motor and a flameproof (Ex d) motor?
A: A flameproof (Ex d) motor is designed with an enclosure capable of containing an internal explosion of gas or vapor. It features flame paths (long, narrow pathways along joints) that cool escaping gases before they can ignite the surrounding atmosphere. In contrast, standard motors do not contain internal explosions and have lower ingress protection.
Q2: Can we run an explosion-proof motor on a Variable Frequency Drive (VFD)?
A: Yes, our YVFE3 and YBBP series are designed for VFD operation. Utilizing VFDs requires careful management of temperature rise at lower speeds and mitigation of shaft voltages. Our VFD motors feature thermal sensors and insulated bearings to prevent discharge currents.
Q3: How do Dust Ignition Proof (Ex t) ratings differ from Gas Protection (Ex d) ratings?
A: Gas protection (Ex d) is designed to manage internal gas combustion. Dust protection (Ex t) relies on ingress protection (IP65/IP66) to prevent combustible dust from entering the motor. The certification also specifies maximum external surface temperatures to prevent dust layer ignition.
Q4: What is the maintenance schedule for motors operating in Zone 1 vs Zone 2?
A: Zone 1 installations require frequent inspection of flame paths, terminal box seals, and insulation resistance. Zone 2 installations are less critical but benefit from regular thermal monitoring, bearing lubrication, and vibration analysis. All repairs should be handled by certified service centers to maintain their safety ratings.

Explosion-Proof & Industrial Specialty Motors

Targeted solutions for challenging environments, including heavy duty DC systems, mining designs, and high-efficiency induction drivetrains.