WHIRLER Vacuum Pressure Impregnation Systems
WHIRLER Vacuum Pressure Impregnation (VPI) Systems are specialized industrial equipment designed to enhance the performance and durability of various components, primarily by filling microscopic voids and pores with a protective resin or varnish. This process is crucial for improving insulation, mechanical strength, thermal conductivity, and resistance to environmental factors like moisture and contaminants.
How it works: The VPI process typically involves placing the component (e.g., electrical windings, metal castings) into a sealed chamber. A vacuum is then applied to remove air and moisture from any internal voids or porous structures. Once the vacuum is established, a liquid resin or varnish is introduced into the chamber, which then saturates the component under pressure. After impregnation, the component is cured, usually through a thermal process, to solidify the resin, creating a monolithic and homogenous structure.
Key Applications:
- Electrical Insulation: WHIRLER VPI systems are widely used for impregnating electrical windings in motors (including induction and submersible pump motors), generators, transformers, and coils. This significantly increases their dielectric strength, thermal stability, and resistance to environmental damage, leading to a longer, more maintenance-free lifespan for electrical apparatus.
- Casting Porosity Sealing: They are also utilized to seal microscopic pores in metal castings across various industries such as automotive, aerospace, and power generation. This improves the casting’s structural integrity, pressure tightness, surface finish, and reduces scrap rates.
WHIRLER offers various VPI systems, including single-stage, multi-stage, fully automatic, and semi-automatic options, catering to different production needs and component sizes. They are known for their robust construction, efficient performance, and ability to provide a “void-free” insulation system, which is vital for preventing component failures.