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Hazardous location and explosion-proof servo motors are engineered for motion control in environments where flammable gases, vapors, or combustible dust may be present.
In these settings, motor selection is driven by regulatory classification, ignition risk, and certified protection methods—not just torque and speed.
Compliance with Class/Division or Zone standards determines whether equipment can be legally and safely installed in a defined area. Construction methods, enclosure design, and temperature ratings are all tied directly to the surrounding atmosphere.
Understanding how hazardous classifications differ from explosion-proof protection is the first step in selecting the correct motor for the application.
What Is a Hazardous Location Servo Motor?
A hazardous location servo motor is certified for environments containing flammable gases, vapors, or combustible dust. Certification defines where the motor may be installed and under what conditions it can operate safely.
Classification systems include:
Class I, Division 1
Class I, Division 2
Zone 1 and Zone 2 (ATEX / IECEx)
Gas group and temperature class (T-ratings)
What Does Explosion-Proof Mean?
Explosion-proof is one specific protection method within hazardous locations.
An explosion-proof servo motor:
Contains an internal ignition event
Prevents flame propagation outside the enclosureWhat Is a Hazardous Location Servo Motor?
Uses defined flame paths and heavy-duty housings
Is certified for specific gas groups and temperature classes
Explosion-proof is not synonymous with all hazardous ratings. It is a subset.
Designed for closed-loop servo control in applications involving flammable gases, vapors, or combustible dusts, while maintaining mechanical and control compatibility with standard AKM motors.
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