An explosion proof fan motor is a special motor for fans. It can work safely in places where explosions might happen. It is made from ordinary fan motors but has extra safety features. The motor has a sealed design and uses strong materials. These materials resist fire and impacts. The design stops sparks or heat inside the motor from lighting up nearby flammable gases or dust. This makes the motor safe for dangerous areas. It helps with ventilation and cooling without causing explosions.
Application Environment
Explosion proof fan motors are used in dangerous areas. These places have risks of fire or explosions.
Common places include:
Chemical plants: Where flammable liquids (like gasoline, alcohol) or gases (like methane) are stored.
Coal mines: Underground areas with explosive dust and gases.
Drug factories: Where solvent vapors can catch fire during production.
Grain plants: Where flour or starch dust can explode if sparks occur.
Oil/gas stations: Where gasoline or diesel is stored.
Ordinary fans are unsafety here. Explosion-proof fans work safely in these places.
The Ex mark is an international standard symbol indicating that a motor complies with explosion-proof regulations. When choosing explosion-proof motors, be sure to select products bearing the Ex mark.
As a motor manufacturer, Milestone Motor offers CNEX explosion-proof certification and ISO9001 quality management system certification. Our motors meet the requirements of the GB3836 national explosion proof fan motor standard. At Milestone Motor, we are dedicated to producing high-quality products that meet standards and ensure product safety and reliability.
The Parameter For Explosion Proof Grade
| Components of Explosion-Proof Grade | Common Markings | Description |
| Explosion-Proof Type | d, ia, ib | 1. d (Flameproof Type): The most commonly used type. The motor housing can "contain" internal sparks and explosion pressure to prevent leakage and ignition of hazardous substances;2. ia/ib (Intrinsically Safe Type): Prevents the generation of ignitable sparks or high temperatures by limiting circuit energy, mostly used in instruments and small motors. |
| Explosion-Proof Area Class | I, II, III | 1. I: Suitable for underground coal mine environments, applicable to scenarios with explosion risks such as gas and coal dust;2. II: Suitable for industrial explosive gas environments, such as chemical workshops and oil depots;3. III: Suitable for explosive dust environments, such as grain processing plants (flour dust) and metal powder workshops. |
| Gas/Dust Group | IIA, IIB, IIC; IIIA, IIIB, IIIC | 1. Gas Groups (Series II): IIA ＜ IIB ＜ IIC. Class IIC is the strictest and can handle highly explosive gases such as methane and acetylene;2. Dust Groups (Series III): IIIA ＜ IIIB ＜ IIIC. Class IIIC can handle high-risk dusts such as aluminum powder and magnesium powder. |
| Temperature Class | T1, T2, T3, T4, T5, T6 | Represents the maximum surface temperature of the motor during operation; the higher the number, the lower the temperature:T1 (450℃) → T2 (300℃) → T3 (200℃) → T4 (135℃) → T5 (100℃) → T6 (85℃);Class T4 or lower is commonly used in oil depots and gas stations to prevent high temperatures from igniting flammable substances. |
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