8481.30.20 - Of iron or steel

This HTS category, 8481.30.20, specifically covers check (nonreturn) valves that are constructed from iron or steel. These valves are designed to allow fluid or gas to flow in only one direction, preventing backflow. Their application is broad, serving in various piping systems, boiler shells, tanks, and vats across industrial and commercial settings.

Within the broader classification of check valves, this subcategory is distinct from its sibling, 8481.30.10, which pertains to check valves made of copper. The primary distinguishing factor is the material of construction, with 8481.30.20 exclusively applying to ferrous metals. This distinction is crucial for customs valuation and duty assessment.

Further specialization is provided by the subcategories under 8481.30.20. These subdivisions, 8481.30.20.10 (Of iron) and 8481.30.20.90 (Of steel), allow for a more precise classification based on the specific type of iron or steel alloy used in the valve's manufacturing. This granular detail facilitates accurate statistical tracking and regulatory compliance for imports and exports of these essential industrial components.