When choosing actuators for explosive environments, safety and compliance with international standards are paramount. The goal is to prevent ignition caused by electrical sparks, high temperatures, or material interactions. Below are key considerations and actuator types suited for hazardous areas:
Explosion Proof Valve
* Certified to meet safety regulations, such as:
- ATEX (European Directive for explosive atmospheres)
- IECEx (International Electrotechnical Commission Certification)
- NEC/CEC Class I, Division 1 & 2 (U.S. and Canada hazardous location standards)
* "Ex" markings indicate suitability for hazardous areas.
Non-sparking materials like stainless steel, aluminum, or bronze.
Resistance to corrosive gases, dust, or chemicals present in the environment.
Rated for the temperature class (T1–T6) of the hazardous area.
Constructed with heat-resistant enclosures and proper ventilation.
Weatherproof ratings (IP66, IP67, or IP68) for dust and water protection.
Explosion-proof enclosures prevent internal ignition sources from escaping.
Compressed air control for low maintenance and long life.
Electric control for easy installation and reliable performance.
Pneumatic control using compressed air or inert gases, eliminating ignition risks.
- Can also be controlled with electric solenoid valves.
- Sometimes used with non-inert gases such as methane gas.
Suitable for high-speed, repetitive motion applications.
Require air preparation systems to ensure clean and dry air.
Electric control when intrinsically safe or have explosion-proof enclosures.
Additional features may include fail-safe or proportional control.
Explosion-proof solenoids are used for quick, controlled actuation.
Often integrated into valves and emergency shut-off systems.
Conduct a hazard analysis to identify the type of explosive atmosphere (gas, vapor, dust) and its classification.
Regularly inspect seals, housings, and components for wear or damage.
Work with reputable manufacturers experienced in designing actuators for explosive environments.
