8414.90.91.40 - Of vacuum pumps

This HTS category, 8414.90.91.40, specifically enumerates parts of vacuum pumps. It encompasses a wide array of components and subassemblies that are integral to the functioning of vacuum pumps. This includes, but is not limited to, impellers, rotors, stators, housings, seals, diaphragms, vanes, and various internal mechanisms designed to create and maintain a vacuum. The key defining characteristic is that these parts are intended for and specifically designed for use in vacuum pump machinery.

While the parent heading covers parts for air or vacuum pumps, compressors, fans, and hoods, this specific sub-heading narrows the focus exclusively to components for vacuum pumps. It distinguishes itself from sibling categories, such as 8414.90.91.80 ("Other" parts), by providing a more granular classification for those parts dedicated solely to vacuum generation. This ensures that components specifically related to vacuum technology are appropriately categorized, facilitating accurate tariff assessment for these specialized items.

As this is a leaf node in the HTS classification structure, there are no further subcategories to introduce. Therefore, the focus remains on clearly defining the scope of "parts of vacuum pumps." Classification within this category is determined by whether a particular component is solely designed and intended for incorporation into a vacuum pump, regardless of the specific type of vacuum pump (e.g., rotary vane, diaphragm, scroll, etc.). The material composition and physical characteristics of the part will be relevant in applying specific tariff rules and notes if further clarification is needed during the classification process.