Proportional Pressure Control Valve for Float Zone Crystal Furnace from Japan
Used in float zone furnaces for growing high-purity silicon crystals, this valve proportionally adjusts process gas pressure via electronic signals from vacuum controllers. Falls under 8481.80.9020 as a control valve designed for proportional signal operation in semiconductor crystal manufacturing apparatus. Maintains zone stability during melting without crucible contamination.
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
• Specify vacuum-rated construction (e.g
• <10^-6 Torr) and signal protocol (Profibus/EtherCAT) in entry docs
• Classify individually, not as furnace parts, if imported separately with mounting hardware