Czochralski Crystal Puller Gas Control Valve from China
High-precision valve component for regulating argon or nitrogen gas in Czochralski crystal pullers used to grow pure silicon boules for semiconductor wafers. Classified under HTS 8481.90.9040 as a part of 8481.20 pressure-reducing valves tailored for semiconductor manufacturing processes.
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
• Include detailed blueprints showing compatibility with 8481.20 valves to support classification
• Comply with ITAR/EAR if valve tech enables advanced semiconductor purity levels
• Test for leak rates below 10^-9 atm-cc/sec to satisfy import quality inspections