Clean Air Purge Systems

Critical electronic systems like the process control systems used in oil refineries must be kept in a clean environment free of airborne contamination. To accomplish this, the system is housed in a sealed enclosure with a one-way pressure relief valve and a clean compressed-air or nitrogen source to create a positive differential pressure relative to the outside of the enclosure. The valve is set to a precise pressure that ensures no contamination enters the cabinet while protecting the structure from damage due to over-pressurization.