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Vacuum Pressure Impregnation (VPI)

K&N has the largest Vacuum Pressure Impregnation (VPI) system in the Northwest. We will protect your motor from the chemical exposure and harsh environments using state-of-the-art technology and superior VonRoll Permafil catalyzed epoxy resin.


Our VPI Capabilities

Our 10 ft diameter is capable of impregnating motors up to 7 kV and Von Roll 74035 single component epoxy resin, which will increase the dielectric rating, improve the mechanical bond, and enhance resistance to moisture and chemicals.

Vacuum Pressure Impregnation (VPI): The Insulation Process

Vacuum Pressure Impregnation, or VPI, is a crucial step in our form wound coil rewind process. Not only does this step provide the necessary electrical insulation for motors and apparatuses, VPI also works to keep coils in place, bonded together, and guards these new windings against corrosion and pollutants.

VPI, like its name implies, is an insulation procedure that makes use of highly precise vacuum and pressure cycles. Using our vacuum systems, K&N is able to coat the coils with a layer of epoxy resin.

The advantages of the VPI coil insulation process are numerous. Firstly, it provides significant protection and corrosion resistance when placed in difficult environments. VPI is also known for offering better heat transfer abilities, which results in increased motor and apparatus efficiency. Lastly, the vacuum pressure impregnation process is the most efficient insulation process for reducing coil vibration. For insulation services you can trust, contact K&N today!


If you’re searching for an electric motor resource with decades of proven excellence installing and maintaining the industry’s best equipment, call K&N Electric today at (509) 838-8000. With locations in the Spokane and Moses Lakes regions, we are ready to provide you with the sales and service support you need.