An explosion-proof (Ex) thruster is an electro-hydraulic actuator designed for use in hazardous areas where flammable gas or combustible dust may be present. The thruster’s electrical and mechanical design prevents ignition of the surrounding atmosphere, typically through flameproof enclosures, increased safety design, or other protection methods depending on certification type.
Ex thrusters are commonly used in coal mines, petrochemical plants, oil and gas facilities, grain handling, and certain chemical processing environments—anywhere a brake must be released reliably while meeting hazardous-area compliance. They are frequently paired with drum (block) brakes on conveyors, hoists, and material handling machinery.
Selecting an Ex thruster requires matching the correct certification to the site classification (gas group/dust type, temperature class, zone). Also consider IP rating, ambient temperature, duty cycle, and maintenance access. Installation practices matter: certified cable glands, proper grounding, and avoiding unauthorized modifications are essential to maintain compliance. Using certified spare parts helps preserve the integrity of the explosion-proof system.