Explore our top-performing industrial motors engineered for heavy-duty HVAC, positive pressure ventilation, and hazardous environment ventilation applications.
Shaanxi Nanfang Motor Technology Co., Ltd serves as 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), Wolong has pioneered the electric motor and drive control industry for over 30 years. Today, the group operates 3 massive manufacturing bases, 39 advanced factories, and 3 state-of-the-art R&D centers globally.
Our commitment to a globalized brand strategy places Wolong at the pinnacle of scientific research, technology, design processes, automated manufacturing, and worldwide sales networks. We provide integrated industrial drive systems to meet the most exacting industrial compliance guidelines across continents.
How Wolong integrated century-old global motor expertise to build the world's most robust industrial drive ecosystem.
Accumulating abundant assets and brilliant experience in manufacturing, Wolong reached for global integration. To position itself as the leading manufacturer of AC motors and drives worldwide, the group executed strategic overseas acquisitions of major heavy industrial drive manufacturers:
In 2011, Wolong acquired 97.94% of the Austrian ATB Group, one of Europe's top three motor manufacturers. This brought Morley Motors under the Wolong umbrella. Morley, with a 130-year legacy in underground coal mining ventilation and conveyor systems, represents the gold standard of mining durability.
Pioneering low starting current motors, Laurence Scott is renowned for supplying specialized drives for British nuclear power plants and marine navy vessels. Wolong's technological integration has sustained Laurence Scott's continuous recognition, winning prestigious engineering awards globally.
Brook Crompton specializes in highly efficient, low-voltage, and high-voltage AC motors. Operating in harsh municipal and petrochemical sectors, they lead the market in energy efficiency with their premium "W" and "10" motor series.
Founded in Germany in 1882, Schorch represents ultra-heavy industrial drive excellence. Their specialized motors drive compressors, gas transmission systems, and large centrifugal blower fans in water management and steel plants.
Partnering since 1999, OLI is the global market leader in electric vibration motors and hazardous area vibration sensors, providing critical flow-aid solutions in massive bulk material handling plants.
In 2015, China's largest explosion-proof motor base (CNE) joined Wolong. In 2018, General Electric (GE) Industrial Motors partnered with Wolong, strengthening capabilities in massive petrochemical drive systems.
Engineered to operate in high-risk zones, petrochemical fields, and municipal infrastructures around the globe.
Engineered for Zone 1, Zone 2, Zone 21, and Zone 22. Certified with complete explosion-proof ratings to satisfy regional HSE compliance for petrochemicals and underground coal mining.
IE3, IE4, and ultra-premium IE5 permanent magnet synchronous designs. Substantially reduces operating costs in continuous running blower applications, supporting corporate carbon-neutrality initiatives.
A comprehensive drive matrix ranging from low-voltage AC blowers to ultra-high voltage (up to 13.8kV) positive-pressure asynchronous motors, handling flows in municipal ventilation and raw gas pipelines.
By bringing Brook Crompton, Laurence Scott, and Schorch together, Wolong has introduced advanced digital platform configurations across all factory sites. The implementation of digital twin modeling and finite element thermal simulations guarantees optimal ventilation performance.
Our blower motor solutions are widely utilized in heavy industries, municipal water management, mine shafts, offshore drillships, and steel manufacturing plants. Through structural improvements, we minimize vibration transfer, reduce acoustic output, and extend the operational life of key components.
A look inside Wolong's precision-engineered industrial AC blower motors.
Our rotors feature robust squirrel cage designs, using centrifugal aluminum casting or die-casting techniques. Molten pure aluminum is poured into the rotor core slots to form a unified structure that integrates the rotor bars and end rings. This design minimizes joint resistance, prevents bar breakage, and ensures high starting torque properties.
For larger capacities, copper bar rotors are used. They feature high-strength end-ring welding and protective rings for high-speed applications, ensuring stable operation during dynamic load shifts.
Our stator coils are insulated using high-mica content tape, polyester film, and glass cloth. The winding assemblies undergo the Vacuum Pressure Impregnation (VPI) process to eliminate air pockets, creating a moisture-proof, hermetically sealed insulation barrier.
This process provides high mechanical strength, excellent thermal dissipation, and long-term dielectric performance in chemical atmospheres and high-humidity environments.
The motor frames are developed using structural and fluid multi-physics simulations to determine heat dissipation pathways and natural frequency margins. Cast from high-strength gray iron or structural steel, they provide excellent mechanical redundancy.
This construction isolates high-frequency vibration, absorbs shock, and prevents frame resonance, maintaining alignment under heavy belt tension and direct-drive configurations.
The system features an integrated fan cover body, air guide cylinder, protective window, and silencer plate to optimize airflow and reduce aerodynamic noise. The side-entry air inlet design prevents obstruction from nearby walls, optimizing airflow into the impeller.
IP22 protection ensures safety by preventing contact with moving parts. Sound-absorbing liners damp high-frequency blade-pass noise, helping facilities meet occupational noise limits.
Discover why global engineering companies select our Chinese manufacturing bases for industrial HVAC drives.
As the primary manufacturing hub for Wolong Electric, our facilities in China provide significant cost, technical, and supply chain advantages. Our factories feature automated winding equipment, robotic assembly lines, and CNC machining centers to ensure high-precision tolerances.
Our proximity to local high-grade silicon steel suppliers, copper refineries, and rare-earth element processing centers ensures stable supply chains. It allows us to produce IE4 and IE5 permanent magnet motors with lower carbon footprints and consistent materials quality.
Our facilities accommodate customized shaft variations, custom mounting configurations, multi-speed windings, and integrated temperature sensor packages (PTC, PT100). This flexibility allows for drops-in replacements in existing systems without altering system layout.
Every motor undergoes load tests, insulation resistance checks, vibration analysis, and sound level validation before shipment. Our facilities house authorized witness testing labs for CSA, UL, and ATEX/IECEx certifications, streamlining delivery timelines.
Keep pace with global regulations, environmental standards, and automated control developments.
Global regulations are moving toward IE4 and IE5 energy targets to lower emissions. Blower applications, which run continuously, benefit significantly from these high-efficiency designs, offering substantial returns on investment over their operating life.
Modern ventilation drives integrate smart vibration sensors, thermal probes, and current monitors. This data feeds into central SCADA systems, enabling predictive maintenance that avoids unplanned downtime in critical environments like mines or chemical plants.
Traditional fixed-speed blowers are being replaced by VFD-driven systems. Our motors feature insulated non-drive end bearings and reinforced insulation schemes to withstand VFD voltage spikes, protecting against premature bearing degradation.
Wolong motors are built to operate reliably in diverse environments, from sub-zero municipal installations to high-temperature oil and gas facilities.
Volatile hydrocarbons require flameproof and positive-pressure motors. Our YBBP and YZYKS series prevent sparks from contacting explosive gas mixtures, maintaining continuous operation in refinery cooling systems.
Mining operations require high-volume fresh air systems. Our high-voltage explosion-proof motors drive large fans to clear carbon monoxide and methane gas, ensuring safe operating conditions underground.
Our WXF high-temperature fire motors are certified to operate continuously at high temperatures (up to 400°C for two hours). They keep emergency smoke evacuation systems running during facility fire events.
Continuous oxygenation in wastewater treatment plants requires reliable aeration blowers. Our WE3 series provides efficient continuous service, helping plants lower their annual energy consumption.
Wolong drives carry certifications recognized by regulatory authorities worldwide.
Our products are engineered to comply with multiple regional standards, simplifying import, installation, and commissioning. We design motors according to both IEC and NEMA guidelines to meet global specifications.
Nemko / ATEX
CSA Standard
CE Certification
CCC Mark
SABS Approved
TESTSAFE
A step-by-step overview of the ordering process, from technical review to delivery.
Our engineering team works with global buyers to match motor specifications to operational needs. Follow this process to ensure correct sizing and compliance:
Step 1: Technical Parameter Alignment
Define input voltage, frequency, ambient temperature range, and speed profiles (single-speed, multi-speed, or VFD-controlled). Identify structural dimensions and mounting positions (foot-mount B3, flange B5, or B35 combinations).
Step 2: Environmental Classification
For hazardous zones, specify gas/dust classifications (Group IIA, IIB, IIC) and temperature classes (T1 through T6) to select the correct ATEX, IECEx, or EAC protection level.
Step 3: Custom Winding & Accessories Selection
Incorporate thermal protection (PT100 RTDs in bearings and windings), anti-condensation heaters for damp environments, or custom shaft extensions.
Step 4: Inspection, Logistics, and Document Delivery
We supply complete test reports, drawings, maintenance manuals, and certificates with every shipment to simplify customs and commissioning.
Technical answers to common questions about industrial AC blower motors and environmental compliance.
CE certification indicates compliance with European health, safety, and environmental protection standards, required for any motor imported into the EEA. ATEX is a European directive focused on equipment safety in explosive atmospheres. IECEx is an international standard for certifying equipment used in explosive atmospheres. While ATEX is mandatory in the EU, IECEx is widely accepted across other global regions.
Permanent magnet (PM) motors use rare-earth magnets in the rotor to generate a constant magnetic field, eliminating the rotor current losses (heat) found in typical squirrel cage induction motors. This design achieves IE4 or IE5 efficiency ratings, particularly during part-load operations controlled by a VFD.
Vacuum Pressure Impregnation (VPI) extracts air bubbles from the stator coils and fills the gaps with premium resin under high pressure. This creates a solid insulation block that resists moisture, chemical corrosion, dust, and mechanical vibration, preventing winding short-circuits in harsh conditions.
Positive pressure (Type Ex p) motors maintain an internal pressure of clean air or inert gas higher than the surrounding atmosphere. This pressure barrier prevents flammable gases or dust from entering the housing, allowing the motor to operate safely in Zone 1 or Zone 2 areas.
Standard motors running on VFDs can suffer from bearing damage caused by shaft currents and winding insulation degradation from voltage spikes. For VFD operation, we use insulated non-drive end bearings to block shaft currents and apply reinforced winding wire with Class H insulation to handle voltage peaks.
We design low-noise systems using optimized air intake hoods, balanced fan impellers, internal acoustic insulation liners, and ribbed frames to reduce vibration. This structure dampens motor noise and limits vibration transfer to connected ductwork.
The temperature class (T-rating) specifies the maximum surface temperature the motor can reach under any operating condition, including faults. This temperature must remain below the ignition temperature of the gases or dust present in the environment. For example, a T4-rated motor will not exceed 135°C, making it safe for gases with ignition thresholds above that limit.
Wolong holds TESTSAFE certifications, the primary coal product certification accepted in Australia. Our motors undergo testing for impact resistance, dust ingress, flamepath tolerances, and thermal limits to comply with local safety regulations.
Explore our certified heavy-duty asynchronous, synchronous, and high-voltage motors designed for industrial drive applications.
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