Czochralski Crystal Puller Compressor Valve from China
This precision compressor valve is a critical part of the gas delivery system in Czochralski crystal pullers used for growing monocrystalline silicon boules in semiconductor manufacturing. It regulates high-purity argon or nitrogen flow under vacuum conditions to prevent contamination during crystal growth. Classified under 8414.90.41.55 as a part of hermetic compressors in subheading 8414.40 for semiconductor wafer production equipment.
Duty Rate — China → United States
35%
Rate breakdown
9903.03.0110%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
9903.88.0125%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]
Import Tips
• Verify the part is specifically for 8414.40 hermetic compressors used in semiconductor equipment via manufacturer specs and end-use certification
• Include detailed technical drawings and bills of materials showing compatibility with crystal growers to avoid reclassification