High-performance electric motor range for extreme environments, hazardous oil-gas facilities, mining operations, and large-scale industrial systems.
Xi’an Lite SIMO Motor Co., Ltd is an electric machinery manufacturer specializing in large, medium-sized, high and low voltage AC motors, DC motors, synchronous motors, and high-efficiency flameproof explosion-proof motors within the mechanical industry.
SIMO operates as a comprehensive manufacturer and services supplier, offering in-house design, foundry work, mechanical processing, mold fabrication, and automated assembly operations. We are structured to meet complex custom design briefs from global engineering contractors and plant operators.
For over six decades, SIMO Motor has evolved from a local manufacturing base to an international hub for high-efficiency electric motors.
How our R&D engineers construct explosion-proof motors that withstand extreme internal pressures without releasing ignition sources.
Unlike increased safety (Ex e) structures, SIMO Ex d motors (YBX3, YBX4, YBX5) are engineered with heavy-duty cast iron frames (FC250/FCD450) designed to contain an internal explosion of gas or vapor mixtures without rupturing, preventing the transition of fire to the outer explosive environment.
Our CNC machining ensures strict flamepath clearance (spigoted, cylindrical, and threaded joints) conforming to IEC 60079-1 standards. These microscopic escape routes cool the escaping gas expansion down below the ignition temperature threshold of ambient gases before exiting.
By using low-loss cold-rolled silicon steel laminations and optimized stator windings, we minimize heat generation in hazardous zones. SIMO's YE4 and YE5 motor series provide high power density, reduced operational cost, and lower carbon emissions across the system lifetime.
| Motor Series | Protection Type | Efficiency Class | Power Range (kW) | Suitable Hazardous Zone | Key Gas/Dust Group |
|---|---|---|---|---|---|
| YBX3 Series | Ex d I Mb / Ex d IIB T4 Gb | IE3 Premium Efficiency | 0.55 - 375 kW | Zone 1 & Zone 2 | Methane, Coal Dust, Group IIB |
| YBX4 Series | Ex d IIC T4 Gb | IE4 Super Premium | 0.37 - 375 kW | Zone 1 & Zone 2 | Hydrogen, Acetylene, Ethylene |
| YBX5 Series | Ex d IIC T4/T5 Gb | IE5 Ultra Premium | 0.55 - 375 kW | Zone 1 & Zone 2 | Highly Volatile Refineries, Chemical Plant Gases |
| YFB3 Series | Ex tD A21 IP65 | IE3 Premium Efficiency | 0.75 - 375 kW | Zone 21 & Zone 22 | Combustible Dusts (Grain, Coal, Sugar, Metal) |
Why leading global EPC firms source from Xi'an SIMO Motor: infrastructure scale, automated quality control, and robust vertical integration.
SIMO's main plant in Xi'an houses 1,172 sets of advanced equipment. Our casting, CNC machining, winding insertion, and insulation treatment are integrated under a single, unified MES (Manufacturing Execution System).
With a registered capital of 21.5 million RMB and total fixed assets of 380 million RMB, we run three specialized motor assembly units and one high-precision accessory factory. This guarantees raw material availability and control over core components (stators, dynamically balanced rotors, flameproof casings, and specialized shaft forgings).
Our Vacuum Pressure Impregnation (VPI) equipment delivers Class F and Class H class insulation that prevents electrical failures, humidity ingress, and thermal degradation in aggressive environments.
Delivering high-reliability power systems for demanding processes worldwide.
Operating gas compressor packages, pipeline transfer pumps, agitators, and air-cooled heat exchangers in refineries and offshore drilling platforms. Ex d IIC classification ensures complete safety under heavy hydrocarbon vapor presence.
Severe underground mining applications require high-strength explosion protection (Ex d I Mb). SIMO motors run main mine ventilation fans, longwall conveyors, heavy-duty shearers, and dewatering pumps with protection against coal dust/methane atmospheres.
Driving high-capacity water intake pumps, biological process aerators, and high-pressure chemical dosing pumps. Featuring advanced protection against moisture and corrosive fumes using custom epoxy-based paints.
SIMO motors conform to global engineering directives. Every machine is extensively tested for safety-critical deployment.
We hold certifications from major international registrars and verification houses, ensuring compliance with ISO9001:2015 Quality System, European Union CE, United States UL, and Russian EAC (GOST). This guarantees that our explosion-proof motor product lines satisfy strict local safety protocols.
Key criteria to evaluate when assessing Chinese flameproof motor manufacturers for capital projects.
Ensure the manufacturer uses high-strength structural grade gray cast iron or ductile cast iron for frames (minimum HT250/FCD450). Terminal boxes must be separately certified and robustly sealed using high-performance fluororubber or silicone gaskets to maintain IP66 rating.
For chemical and heavy duty applications, specify Class F insulation with a Class B temperature rise limit (80K). The addition of dual Pt100 RTDs in stator winding slots and bearing housings ensures continuous telemetry feedback to DCS systems.
Heavy-duty radial load designs should utilize oversized SKF, FAG, or high-tier domestic bearings. For VFD-fed motors, insulated non-drive end (NDE) bearings and shaft grounding rings are necessary to prevent electrical discharge erosion (fluting).
Answers to engineering and compliance questions regarding design, operation, and maintenance.
Explore our line of heavy industry synchronous motors, ultra-premium efficiency IE5 motors, and high-voltage soft-starters.
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