Hydraulic Sequence Valve for Float Zone Wafer Crystal Growth Systems from Japan
Hydraulic sequence valve that controls pressure staging in float zone crystal growers for producing high-purity silicon crystals used in semiconductor wafers. Classified under HTS 8481.10.0020 as hydraulic pressure-reducing type for precise fluid power control. Critical for maintaining zone stability during monocrystalline semiconductor material processing.
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
• Provide technical specifications showing sequence timing compatible with float zone process parameters,Include material certificates confirming compatibility with ultra-high purity process environments,Document integration with crystal growth chamber pressure control systems for proper HTS verification