VPI System Overview
Our Vacuum Pressure Impregnation (VPI) System is a better method than the older method of "dip and bake." It is used for many applications ranging from insulations to sealants. VPI provides 100% solid mass structure, and solvent varnishes lose 50% to 70% of volume during baking. According to numerous field audits since 1975, VPI has, for all practical purposes, eliminated field failures caused by voltage tracking*. *EASA, Electrical Apparatus Service Association, Inc.