Unlike containment or prevention, purge and pressurization separates general-purpose equipment from the surrounding potentially explosive atmosphere using a standard, lightweight enclosure. The enclosure is then purged with industrial-grade air or inert gas to eliminate all hazardous gas inside. Then, the flow is decreased to maintain a pressure higher than that of the dangerous external atmosphere. This prevents the flammable mixture from coming in contact with the components inside the enclosure.
Pepperl+Fuchs offers an array of purge systems. The 2000 series is a legacy system that is now obsolete, and its recommended replacement is the 6000 series—the latest Type X purge system from Pepperl+Fuchs.