The 7500 series is a type Z/Ex pzc purge and pressurization system that enables non-rated electrical equipment to be used in hazardous areas. The 7500 series is a certified system for UL Class I and II/Div. 2 as well as for Zone 2/22 hazardous locations. A complete 7500 purge and pressurization system requires a control unit, a manifold valve, and a vent. It can be configured as a manual or fully automatic system. This blog article shows you how to configure the 7500 system components, i.e. control unit, manifold valve, and vent.