Parts, including regulators
Hydraulic turbines, water wheels and regulators therefor; parts thereof: > Parts, including regulators
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 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 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(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified under HTS 8410.90.00.00
Kaplan Turbine Blades
Adjustable propeller blades for Kaplan turbines used in low-head, high-flow hydroelectric sites, allowing pitch variation for efficiency. Typically cast from stainless steel or bronze alloys. Classified as parts of hydraulic turbines under HTS 8410.90.00.00.
Turbine Draft Tube
Conical or elbow-shaped draft tube that recovers kinetic energy from water exiting hydraulic turbine runners, improving overall efficiency. Fabricated from welded steel plate. Parts of hydraulic turbines under HTS 8410.90.00.00.
Stay Ring for Turbine
Circular steel ring with radial stay vanes that support spiral casing and guide water flow evenly to wicket gates in Francis turbines. High-strength welded construction. Classified under HTS 8410.90.00.00 turbine parts.
Turbine Bearing Housing
Oil-lubricated bearing housings for supporting turbine main shafts, designed for continuous operation under high radial and thrust loads. Includes cooling jackets. HTS 8410.90.00.00 as hydraulic turbine parts.
Head Cover for Turbine
Top steel cover plate sealing the upper chamber of Francis turbines above the runner, designed to withstand hydraulic head pressure. Includes lifting lugs for maintenance. Parts under HTS 8410.90.00.00.
Servomotor for Wicket Gates
Hydraulic or electric servomotor actuating wicket gate linkages in reaction turbines, providing precise position control under high pressure. Integrated position feedback. Regulators/parts under HTS 8410.90.00.00.
Turbine Generator Coupling
High-torque flexible coupling specifically designed to connect vertical hydraulic turbine shafts to generators, compensating for thermal expansion and alignment variations. Disc or gear type. HTS 8410.90.00.00 parts.
Bulkhead Gate for Turbine Intake
Heavy steel maintenance gate sealing turbine water intake during runner removal or inspection, with hydraulic hoist provisions. Pressure-rated for full head. Considered regulators/parts under HTS 8410.90.00.00.
Pelton Wheel Runner
The Pelton wheel runner is a key rotating component of Pelton turbines used in high-head hydroelectric power plants. It features bucket-shaped cups designed to efficiently capture the kinetic energy from high-velocity water jets. Classified under HTS 8410.90.00.00 as a part of hydraulic turbines.
Francis Turbine Runner
Francis turbine runners are mixed-flow impellers used in medium-head hydroelectric installations, featuring adjustable guide vanes for optimal performance. Made from high-strength alloys to withstand water pressure and cavitation. Falls under HTS 8410.90.00.00 as essential parts of hydraulic turbines.
Wicket Gates Assembly
Adjustable guide vanes (wicket gates) that control water flow into Francis turbine runners, regulating power output and preventing cavitation. Precision-machined from stainless steel. HTS 8410.90.00.00 as regulators/parts for hydraulic turbines.
Hydraulic Turbine Governor
Electronic-mechanical regulator that maintains constant turbine speed by adjusting wicket gates or blade pitch based on load changes. Includes PID controllers and hydraulic actuators. Specifically 'regulators therefor' under HTS 8410.90.00.00.
Spiral Casing for Hydraulic Turbine
Volute-shaped steel casing that distributes water evenly around the turbine runner in Francis and Kaplan turbines. Designed for optimal velocity distribution. HTS 8410.90.00.00 as hydraulic turbine structural part.
Turbine Shaft and Coupling
Forged steel shaft connecting hydraulic turbine runner to generator, with flexible couplings to accommodate misalignment. Precision-balanced for high-speed rotation. Parts of hydraulic turbines per HTS 8410.90.00.00.
Turbine Pit Liner
Stainless steel or rubber-lined liner protecting concrete turbine pits from cavitation erosion and sediment abrasion in run-of-river installations. Custom-formed panels. HTS 8410.90.00.00 hydraulic turbine parts.