Hydraulic Counterbalance Valve for Wafer Grinder Spindle Systems from China
Counterbalance hydraulic valve maintaining stable spindle downforce in wafer grinders processing semiconductor wafers to precise thickness. Classifies under HTS 8481.10.0020 as hydraulic pressure-reducing valve for wafer preparation equipment. Prevents spindle bounce during high-precision grinding operations.
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
9903.88.0125%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]
Import Tips
• Provide spindle load and counterbalance force specifications for grinder compatibility,Include dynamic response specifications preventing grinding chatter,Document cleanroom vibration isolation requirements for grinder installation