Nov 30, 2025
In a vacuum environment, the insulating varnish is degassed, and then the pressure difference is used to transport the insulating varnish to the impregnation tank of the product for impregnation (special insulating medium needs to be pumped). Because in a vacuum environment, the insulating varnish can be fully immersed in the gap of the product coil and then immersed in the product. Applying a certain pressure of air (or nitrogen) to the varnish surface further enhances the wetting ability of the insulating paint and greatly improves the insulation strength of the coil.