8481.80.30.30 - Butterfly type

This classification, HTS Code 8481.80.30.30, specifically designates butterfly-type valves of iron or steel. These valves are characterized by a disc-shaped closure element that rotates on a central spindle. When the disc is positioned perpendicular to the flow, it obstructs the passage, and when parallel, it allows full flow. They are commonly employed for throttling, isolation, and quick shut-off applications within pipelines, tanks, and similar vessels.

The "Butterfly type" designation distinguishes these valves from other similar appliances classified under 8481.80.30. For instance, gate-type valves (8481.80.30.10) use a sliding gate, globe-type valves (8481.80.30.15) utilize a movable disc that seats against a valve seat, plug-type valves (8481.80.30.20) feature a cylindrical or conical plug, and ball-type valves (8481.80.30.25) employ a spherical closure element. This butterfly type is specifically identified by its unique rotating disc mechanism.

As a leaf node, HTS Code 8481.80.30.30 does not have further subcategories. Classification at this level is determined by the specific operating mechanism (butterfly type) and the material of construction (iron or steel) as specified in the parent categories. Therefore, any butterfly-type valve made of iron or steel, falling under the broader scope of hand-operated appliances for pipes, boiler shells, tanks, vats, or the like, and not specifically classified elsewhere, would be classified under this HTS code.