Hydraulic Sequence Valve for Float Zone Wafer Crystal Growth Systems from China
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 — China → United States
39.5%
Rate breakdown
9903.88.0125%Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
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