8413.60.00.90 - Other

This category, HTS 8413.60.00.90, encompasses a broad range of other rotary positive displacement pumps that are not specifically enumerated in preceding subheadings. These pumps are designed to move liquids by trapping a fixed amount of fluid and forcing (or "displacing") that trapped volume into the discharge pipe. The defining characteristic is their rotary action, which distinguishes them from reciprocating positive displacement pumps. This classification will include various types of rotary pumps not covered by more specific descriptions, such as gear pumps, screw pumps, vane pumps, and lobe pumps when used for general industrial, agricultural, or domestic fluid transfer applications.

To correctly classify within this subheading, it is crucial to differentiate from sibling categories. HTS 8413.60.00.50 specifically covers oil well and oil field pumps, which are designed for the unique and demanding environments of petroleum extraction. Similarly, HTS 8413.60.00.70 pertains to roller pumps, which typically utilize rollers to displace the fluid. If a rotary positive displacement pump's primary application or design aligns with these specific uses, it would be classified under those respective subheadings rather than this residual "Other" category.

As this is a leaf node within the HTS classification, there are no further subcategories to introduce. Classification under 8413.60.00.90 is dependent on identifying that the pump is a rotary positive displacement type and that it does not fit into any of the more narrowly defined subheadings within 8413.60. The scope is therefore defined by exclusion, focusing on all remaining rotary positive displacement pumps not otherwise specified.