Parts, including regulators
Hydraulic turbines, water wheels, and regulators therefor. > Hydraulic turbines and water wheels: > Parts, including regulators > Parts, including regulators
Duty Rate (from China)
Subheadings
Products classified under Tariff item 8410.90.00
Bulkhead Gate for Turbine Intake
A bulkhead gate is a heavy steel maintenance gate used to seal a turbine water intake during runner removal or inspection. It is pressure-rated for full head and includes provisions for hydraulic hoisting. This gate is a part of the hydraulic turbine system, specifically used for maintenance and safety, and falls under the parts provision of this tariff item.
Francis Turbine Runner
A Francis turbine runner is a mixed-flow impeller used in medium-head hydroelectric installations. It features adjustable guide vanes for optimal performance and is made from high-strength alloys to withstand water pressure. As a key rotating component, it is a part of the hydraulic turbine and falls under this tariff item.
Head Cover for Turbine
A head cover is a top steel cover plate that seals the upper chamber of a Francis turbine above the runner. It is designed to withstand hydraulic head pressure and includes lifting lugs for maintenance. This component is a part of the hydraulic turbine and is classified under this tariff item.
Hydraulic Turbine Governor
A hydraulic turbine governor is an electronic-mechanical regulator that maintains constant turbine speed by adjusting wicket gates or blade pitch based on load changes. It includes PID controllers and hydraulic actuators. This is specifically a regulator for a hydraulic turbine and falls under this tariff item.
Kaplan Turbine Blades
Kaplan turbine blades are adjustable propeller blades used in low-head, high-flow hydroelectric sites. They allow pitch variation for efficiency and are typically cast from stainless steel or bronze alloys. These blades are parts of hydraulic turbines and fall under this tariff item.
Pelton Wheel Runner
A 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 kinetic energy from high-velocity water jets. As a part of the hydraulic turbine, it falls under this tariff item.
Servomotor for Wicket Gates
A servomotor for wicket gates is a hydraulic or electric actuator that moves wicket gate linkages in reaction turbines. It provides precise position control under high pressure and includes integrated position feedback. This is a regulator or part of a hydraulic turbine and falls under this tariff item.
Spiral Casing for Hydraulic Turbine
A spiral casing is a volute-shaped steel casing that distributes water evenly around the turbine runner in Francis and Kaplan turbines. It is designed for optimal velocity distribution and is a structural part of the hydraulic turbine. This falls under the parts provision of this tariff item.
Stay Ring for Turbine
A stay ring is a circular steel ring with radial stay vanes that supports the spiral casing and guides water flow evenly to wicket gates in Francis turbines. It is constructed with high-strength welded steel. This is a part of the hydraulic turbine and falls under this tariff item.
Turbine Bearing Housing
Turbine bearing housings are oil-lubricated housings that support turbine main shafts, designed for continuous operation under high radial and thrust loads. They include cooling jackets and are parts of hydraulic turbines. This falls under the parts provision of this tariff item.
Turbine Draft Tube
A turbine draft tube is a conical or elbow-shaped tube that recovers kinetic energy from water exiting hydraulic turbine runners, improving overall efficiency. It is fabricated from welded steel plate and is a part of the hydraulic turbine. This falls under this tariff item.
Turbine Generator Coupling
A turbine generator coupling is a high-torque flexible coupling designed to connect vertical hydraulic turbine shafts to generators. It compensates for thermal expansion and alignment variations and can be disc or gear type. This is a part of the hydraulic turbine system and falls under this tariff item.
Turbine Pit Liner
A turbine pit liner is a stainless steel or rubber-lined liner that protects concrete turbine pits from cavitation erosion and sediment abrasion in run-of-river installations. It is made of custom-formed panels and is a part of the hydraulic turbine. This falls under this tariff item.
Turbine Shaft and Coupling
A turbine shaft and coupling is a forged steel shaft that connects the hydraulic turbine runner to the generator, with flexible couplings to accommodate misalignment. It is precision-balanced for high-speed rotation and is a part of the hydraulic turbine. This falls under this tariff item.
Wicket Gates Assembly
A wicket gates assembly consists of adjustable guide vanes that control water flow into Francis turbine runners, regulating power output and preventing cavitation. It is precision-machined from stainless steel and is a regulator or part of the hydraulic turbine. This falls under this tariff item.