Model 3003 is a Rapid Exchange purging system that operates
on a supply of compressed instrument air or inert gas. It
regulates and monitors pressure within one or more sealed
(protected) enclosures, in order to rapidly remove and prevent
flammable vapor accumulation within the enclosure(s). The
system accomplishes four air exchanges and maintains a "safe"
(0.25") pressure on one or more enclosures not exceeding a
total volume of 90 cubic feet. An EPV-3 enclosure protection
vent is required for proper operation. This process reduces
the hazardous (classified) area rating within the enclosure(s),
in accordance with the NEC - NFPA 70, Article 500, NFPA 496
and ISA 2.4.