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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If steel bridge/construction components
Radial support structures without water flow function classify as steel structures.
If complex pipe fittings
General steel fittings with radial elements go under Chapter 73.
If pump casings
Pump housings have similar structural elements but different flow paths.
Not sure which classification is right?
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Import Tips & Compliance
• Specify vane angle geometry and pressure containment ratings
• Include radiographic weld test reports for customs inspection
• Differentiate from bridge construction (7308) with hydraulic specifications
Related Products 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.
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.