Butterfly type
Taps, cocks, valves and similar appliances, for pipes, boiler shells, tanks, vats or the like, including pressure-reducing valves and thermostatically controlled valves; parts thereof: > Other appliances: > Hand operated: > Of iron or steel > Of iron: > Butterfly type
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 8481.80.30.30
Cast Iron Butterfly Valve DN50
A hand-operated butterfly valve made of cast iron, featuring a disc that rotates within the pipe to control flow, classified under HTS 8481.80.3030 as a butterfly type hand-operated valve of iron. Used in industrial piping systems for water, air, or low-pressure gas applications. Its quarter-turn operation allows for quick throttling and isolation.
Wafer Fab Cast Iron Butterfly Valve
Hand-operated cast iron butterfly valve designed for cleanroom use in semiconductor wafer processing lines, controlling inert gas flow, under HTS 8481.80.3030 for butterfly type iron valves. Features low-particle generation and precise throttling for sensitive environments. Meets statistical notes for semiconductor manufacturing equipment.
Lugged Cast Iron Butterfly Valve 4-inch
4-inch hand-operated lugged cast iron butterfly valve for end-of-line or dead-end service in chemical processing, HTS 8481.80.3030 as hand-operated iron butterfly type. Lugs allow bolting between flanges without full pipe disassembly. Provides bubble-tight shutoff for slurries and powders.
Triple Offset Cast Iron Butterfly Valve
Hand-operated triple offset cast iron butterfly valve for high-temperature steam service up to 450°F, classified HTS 8481.80.3030 for iron butterfly types. Offset design ensures metal-to-metal seating for zero leakage in demanding conditions. Common in power plants and HVAC systems.
Semiconductor Crystal Grower Butterfly Valve
Specialized hand-operated cast iron butterfly valve for Czochralski crystal puller systems in silicon wafer manufacturing, HTS 8481.80.3030 butterfly type. Controls argon purge gas flow during monocrystalline boule growth per statistical notes. Designed for ultra-high purity environments.
DN100 Cast Iron Lever Butterfly Valve
DN100 (4-inch) lever-handled cast iron butterfly valve for municipal water treatment plants, under HTS 8481.80.3030 as hand-operated iron butterfly. Epoxy-coated for corrosion resistance in wastewater applications. Quick 90-degree operation for flow control.
High Purity Butterfly Valve for Wafer Grinding
Hand-operated cast iron butterfly valve with electropolished interior for semiconductor wafer grinding equipment coolant systems, HTS 8481.80.3030. Used post-crystal grinding to maintain flatness tolerances per statistical notes. Resists slurry abrasion.
Resilient Seated Cast Iron Butterfly Valve
Hand-operated resilient seated cast iron butterfly valve for HVAC ductwork and low-pressure gas lines, classified HTS 8481.80.3030 butterfly type iron. EPDM seat provides bubble-tight closure from vacuum to pressure. Standard lever or gear operation.
Float Zone Crystal Puller Butterfly Valve
Precision hand-operated cast iron butterfly valve for float zone crystal growers producing high-purity silicon wafers, under HTS 8481.80.3030 per statistical note (a)(i). Regulates process gases during zone refining. Vacuum-rated construction.
2-inch Cast Iron Wafer Butterfly Valve
Compact 2-inch wafer-style hand-operated cast iron butterfly valve for tight spaces in semiconductor wafer prep lines, HTS 8481.80.3030 butterfly iron. Thin profile sandwiches between flanges without bolts. Ideal for crystal grinder coolant circuits.