Purge and Pressurization is the onlytechnology that meets the demand forgeneral-purpose equipment with standard IP65enclosures inside hazardous locations by purging instrument air into marshalling cabinets/panels.
Purge and pressurization systems designed according to ATEX direction 94/9/EG, NFPA 496, and ISA 12.4 standards.Another benefit of purging and pressurization is use of the standard Type 4/12 enclosure as the protected enclosure. This saves money, weight, and space over explosion-proof methods.
Advantages• Reduces Heat Build up • Inhibits Metal Corrosion • Requires Low Maintenance • Increases Equipment Longevity • No Special Enclosures Required • Allows Fast Access to Equipment • Reduces Moisture & Dust Build up • Reduces Classification Within the Enclosure • Continuous System Status Indication • Protects Enclosures up to 450 ft3 • Allows use of any Enclosure Shape • Cost of Protection per ft3 DecreasesWith Enclosure Size
Disadvantages• Contains Moving Parts • Requires Instrument Air Supply • Some Systems Require Electronics • Hot Permits Required