Iron Pressure Reducing Valve Seat for Czochralski Pullers from Canada
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 — Canada → United States
15%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Include process flow diagrams; test for helium leak rates; common error: classifying as general pressure vessel part