Proportional Pressure Control Valve for Float Zone Crystal Furnace from Mexico
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 — Mexico → United States
12%
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
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