8481.80.10.90 - Butterfly type

This HTS classification covers butterfly-type valves, specifically those designed for pipes, boiler shells, tanks, vats, and similar vessels. These valves are characterized by a disc mounted on a rotating shaft, which, when turned, either obstructs or permits flow. This particular subcategory is limited to butterfly valves that are hand-operated and constructed primarily of copper. Furthermore, to fall within this classification, the valves must have a pressure rating of 850 kPa or higher, indicating their suitability for applications involving significant internal pressure.

Distinguishing this category from its siblings, the key differentiator is the "butterfly type" of valve. While other sibling categories at this level (e.g., gate, globe, plug, ball types) define valves based on their internal sealing mechanism and operational design, this one specifically isolates the butterfly configuration. The material (copper) and the pressure rating (850 kPa or over) are also critical classification criteria that must be met in conjunction with the butterfly design and hand-operation.

As this is a leaf node within the HTS structure, there are no further subcategories. The classification ends with the specific description of hand-operated copper butterfly valves with a pressure rating of 850 kPa or over. Therefore, classification decisions under this code hinge entirely on the accurate identification of a valve as butterfly type, its hand-operated nature, its copper composition, and its specified pressure handling capability.