This installation is an example of a purge air system utilizing an AMCA Type “A” Spark Resistant Exhaust Blower. Designed for the OEM as part of the larger purge system to help prevent contamination of electrical surfaces from overheating, corrosive gasses, and dirt by moving clean air through the system. This high-pressure arrangement-1 blower features an aluminum fan wheel and housing for spark resistance.
This purge system environment required the most stringent level of spark resistance, the Air Movement & Control Association International (AMCA) Type-A classification, which requires the construction of all fan parts in contact with the airstream and particulates using non-ferrous metal.
For more information, watch this 2-minute video or read our blog on spark resistant fan construction.