8481.10.00 - Pressure-reducing valves

HTS Code 8481.10.00 specifically classifies pressure-reducing valves. These devices are designed to automatically control and maintain a lower downstream pressure from a higher upstream pressure, regardless of fluctuations in the inlet pressure or flow rate. They are integral to systems requiring precise pressure regulation for safety and operational efficiency, commonly found in plumbing, industrial process control, and fluid power applications.

While other valves are classified under heading 8481, pressure-reducing valves are distinct in their primary function. For instance, sibling category 8481.20.00 covers valves specifically for oleohydraulic or pneumatic transmissions, focusing on directional control or flow regulation within these systems. Similarly, 8481.30 deals with check valves, which only permit flow in one direction, and 8481.40.00.00 covers safety or relief valves designed to prevent over-pressurization. Category 8481.80 encompasses a broader range of miscellaneous valves and appliances not otherwise specified, and 8481.90 pertains to parts.

Within 8481.10.00, subcategories further refine the classification based on the type of fluid power system. 8481.10.00.20 is designated for pressure-reducing valves used in hydraulic fluid power systems, typically handling oil-based fluids. The subcategory for pneumatic fluid power type, although not explicitly detailed with a code in the provided context, would cover valves controlling compressed air systems. Lastly, 8481.10.00.90 serves as a residual category for pressure-reducing valves not falling into the hydraulic or pneumatic fluid power classifications, such as those used in general water or gas distribution systems.