Servo-Controlled Proportional Valve for Wafer Grinding Coolant from China
This valve provides proportional control of coolant flow to diamond wafer grinders, responding to spindle load signals for maintaining optimal surface flatness during semiconductor wafer preparation. HTS 8481.80.9020 applies due to its electrical actuator designed for signal-proportional operation in crystal grinding equipment. Critical for achieving nanometer-level wafer tolerances.
Duty Rate — China → United States
39.5%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 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(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• Include OEM specifications confirming compatibility with semiconductor wafer prep equipment to prevent Chapter 84 machinery misclassification
• Test certificates for deionized water compatibility essential; contamination risks lead to CBP holds
• Avoid describing as 'flow controller'—emphasize 'valve with proportional actuator' for correct heading