The enclosures are certified Ex d IIB+H2 and Ex tb as well as "explosion-proof". They are available in many sizes, a wide range of operating elements and monitoring functions can be integrated. Breakdown of the Model Number HRMD91: The manufacturer's. Pepperl+Fuchs provides a specialized portfolio of Ex d (flameproof) and Ex tb (dust protection by enclosure) certified terminal boxes and junction boxes engineered for reliable use in explosion-hazardous areas. These sturdy solutions are certified according to global standards such as ATEX, IECEx. ROSE supplies flameproof enclosures in various sizes and types for use in various gas groups and service-temperature ranges. Whether as. Exd IP66 Explosion-proof Isolators Box Aluminum Controll Panels The explosion-proof electrical equipment produced by our factory has explosion-proof control Panels, explosion-proof starters, explosion-proof power distribution boxes and explosion-proof junction boxes. The professional technical team. Warom Explosion proof Distribution Box (Ex d llB+H2) in 316 stainless steel.