Choosing the Right Explosion-proof Equipment for Your Company’s Operations

90% of explosion accidents are caused by incorrect equipment selection!

Industrial explosions are devastating—yet most are preventable. If you work in oil & gas, chemical processing, or any hazardous industry, this guide is for you. Learn how to select the right explosion-proof devices that meet international standards and protect both your people and assets.

1. Understanding the Explosion-Proof Markings

Every certified device carries critical markings, such as:
Gas: Ex db ⅡC T6 Gb / Dust: Ex tb ⅢC T85℃ Db

This code means:

Ex db = Flameproof protection (for gas environments)

ⅡC = Highest risk gas group (hydrogen, acetylene)

T6 = Maximum surface temperature ≤ 85°C (safest rating)

ⅢC = Highest risk dust group (conductive metals like aluminum/magnesium)

Our explosion-proof damper actuators comply with these standards, ensuring maximum safety.

2. Types of Explosion-Proof Protection (Which One Do You Need?)

Type	Application	Typical Use
Flameproof (Ex db)	Zone 1/2 (high power)	Motors, actuators, heavy equipment
Intrinsically Safe (Ex i)	Zone 0 (low power only)	Control units, sensors
Safety-Increasing (Ex e)	Non-sparking, medium power	Passive sensors, junction boxes

※ Our products use Flameproof (Ex db), ideal for high-power industrial applications in Zone 1/2.

3. Know Your Environment: Gas & Dust Hazards

Gas Explosive Environments (Class II)

ⅡA (Low risk) – Propane, butane

ⅡB (Medium risk) – Ethylene, industrial gases

ⅡC (Highest risk) – Hydrogen, acetylene

Dust Explosive Environments (Class III)

ⅢA – Flammable fibers (cotton, wood)

ⅢB – Non-conductive dust (flour, coal)

ⅢC – Conductive dust (aluminum, magnesium)

※ Our equipment covers ⅡB, ⅡC (gas) and ⅢC (dust)—the most hazardous conditions.

4. Temperature Ratings Matter—T6 Is the Safest

Class	Max Surface Temp.	High-Risk Scenarios
T3	200°C	Hydrogen-rich chemical plants
T4	135°C	Oil depots, ether storage
T5	100°C	Low-ignition dust environments
T6	85°C	Labs, hydrogen-air mixtures

※ Our explosion-proof dampers are T6-rated—the highest safety rating for surface temperature.

5. Hazardous Area Zoning: Choose the Right Equipment for the Setting

Gas Zones

Zone 0 – Constant presence of gas (e.g., inside fuel tanks)

Zone 1 – Frequent presence of gas (e.g., chemical reactor, processing areas)

Zone 2 – Occasional risk (e.g., outdoor loading areas, maintenance spaces)

Dust Zones

Zone 20 – Constant dust clouds (e.g., inside silos)

Zone 21 – Frequent dust exposure (e.g., conveyor belts)

Zone 22 – Rare dust exposure (e.g., filter leaks)

※ Our products are certified for Zone 1/2 (gas) and Zone 21/22 (dust).

Conclusion: Choose Right, Stay Safe

Explosion protection isn’t just about compliance—it’s about responsibility. With:

• Flameproof Ex db design,

• Certifications for IIC/IIIC environments,

• T6-rated thermal safety, and

• Compliance with ATEX & IECEx

Our explosion-proof actuators are trusted in the harshest conditions worldwide.

Don’t compromise. Upgrade to certified safety today.

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