Ball valves, gate valves, globe valves, butterfly valves, plug valves, and needle valves generally fall here when they are not designed specifically for pressure-reducing, hydraulic/pneumatic transmission, check, or safety-relief functions. The residual nature of this heading means classification disputes are common, and a binding ruling from CBP can provide certainty for high-volume importers.

A mill certificate or manufacturer's material declaration specifying the alloy or material grade (e.g., WCB carbon steel, CF8M stainless, LF2 low-temperature carbon steel) is the standard supporting document. This is particularly important because HTS subheadings for valves are often differentiated by body material, and CBP may request this documentation during examination.