8481.80.30.75 - Butterfly type

This HTS classification, 8481.80.30.75, specifically covers butterfly type valves constructed from steel. These valves are designed for controlling or directing the flow of fluids through pipes, boiler shells, tanks, vats, or similar vessels. The "butterfly type" designation refers to their operational mechanism, which typically involves a disc rotating on a central spindle. When the disc is positioned parallel to the flow, it allows for unrestricted passage; when perpendicular, it effectively blocks the flow.

Within the broader category of hand-operated iron or steel valves, this subcategory is distinguished by its unique operating principle compared to its siblings. For instance, gate valves (8481.80.30.55) employ a sliding gate, globe valves (8481.80.30.60) utilize a plug seating against a ring, and ball valves (8481.80.30.70) feature a rotating ball with a bore. The butterfly valve's characteristic disc design and rotational quarter-turn actuation are key identifiers for this specific classification.

As this HTS code represents a leaf node within the tariff schedule, there are no further subcategories under 8481.80.30.75. Classification at this level therefore relies on confirming that the valve is indeed of the butterfly type, is hand-operated, and is manufactured from steel, as opposed to other forms of iron or steel, or other types of valves at the same 8481.80.30 level.