Heat exchangers
Steam or other vapor generating boilers (other than central heating hot water boilers capable also of producing low pressure steam); super-heated water boilers; parts thereof: > Parts > Heat exchangers
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 8402.90.00.10
Czochralski Crystal Puller Heat Exchanger
This heat exchanger is a critical part of Czochralski crystal growers used in semiconductor wafer manufacturing to control the temperature of the melt during monocrystalline silicon boule pulling. It falls under HTS 8402.90.0010 as a heat exchanger component for vapor generating boilers in semiconductor processing equipment.
Float Zone Crystal Grower Heat Exchanger
Designed for float zone method crystal growers, this heat exchanger manages RF heating zone temperatures in semiconductor boule production from polysilicon feedstock. Classified under HTS 8402.90.0010 for its role in super-heated vapor systems of these specialized boilers.
Silicon Wafer Processing Boiler Heat Exchanger
Heat exchanger for boilers in silicon wafer growth systems, precisely controlling vapor temperatures during monocrystalline boule formation for semiconductor fabrication. HTS 8402.90.0010 applies as parts of vapor generating boilers per statistical notes for semiconductor equipment.
Gallium Arsenide Crystal Puller Heat Exchanger
Specialized heat exchanger for compound semiconductor (GaAs) crystal pullers using Czochralski method, managing high-temperature vapor flows in the growth chamber. Falls under 8402.90.0010 as boiler parts for semiconductor material processing equipment.
Crystal Boule Cooling Zone Heat Exchanger
This heat exchanger controls the cooling gradient in the post-growth zone of semiconductor crystal pullers, preventing thermal stress in silicon boules. Classified in HTS 8402.90.0010 for vapor boiler systems in wafer manufacturing equipment.