Czochralski Crystal Puller Gas Control Valve from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 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