The use of ventilators in industrial environments is extremely important given the impact of manufacturing and synthetic chemicals on the environment and employee health. One way to protect workers from evaporative gases in industrial and refinery plants is to install ventilators resistant to atmosphere in risk to explosion, which can occur in such environments. In industries that deal with grains, chemicals, paints, ammunition, fuel, explosives, dust, fine particles and fibers, explosion-proof ventilators are required by law.