Iron Pressure Reducing Valve Seat for Czochralski Pullers from Japan
Steel seat insert for hand-operated pressure-reducing valves maintaining stable argon pressure in Czochralski crystal pullers for silicon wafers. HTS 8481.90.3000 covers such iron/steel parts in semiconductor growth equipment. Critical for boule uniformity.
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 process flow diagrams; test for helium leak rates; common error: classifying as general pressure vessel part