8413.50.00 - Other reciprocating positive displacement pumps

HTS code 8413.50.00 encompasses "Other reciprocating positive displacement pumps." This category is for pumps that move a fixed volume of fluid through a reciprocating action, typically involving a piston, plunger, or diaphragm within a cylinder or chamber. Unlike hand pumps (8413.20.00.00) or pumps specifically designed for internal combustion engines (8413.30), these pumps are not limited to manual operation or automotive applications. They also differ from rotary positive displacement pumps (8413.60.00), which utilize rotating elements like gears, lobes, or screws to achieve fluid displacement.

This classification is intended for reciprocating pumps that do not fall into more specific categories, such as concrete pumps (8413.40.00.00) or pumps designed for measuring applications. The key defining characteristic remains the reciprocating mechanism for positive displacement, meaning the pump traps a fixed amount of fluid and forces it through the discharge outlet.

Within 8413.50.00, further subcategories exist to refine classification based on specific applications or designs. "Oil well and oil field pumps" (8413.50.00.10) are designated for the extraction and handling of oil and gas. "Diaphragm pumps" (8413.50.00.50), which utilize a flexible diaphragm to create the pumping action, are also separately classified. The residual "Other" category within this subheading serves to capture all remaining reciprocating positive displacement pumps that do not meet the criteria for these more specific subdivisions.