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%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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