Brass Diaphragm Check Valve for Crystal Grinder Coolant from United States
A brass diaphragm check valve designed for coolant systems in crystal grinders that shape semiconductor boules. It provides zero-leakage, unidirectional flow at pressures exceeding 850 kPa, ensuring precision during wafer preparation. Classified under tariff item 8481.30.00 as a check (nonreturn) valve of copper alloy.
Duty Rate — United States → Canada
0%
Import Tips
• Ensure the valve's pressure rating (over 850 kPa) is documented in the commercial invoice to support classification under 8481.30.00
• Verify the copper alloy composition with a mill certificate, as valves of other materials may fall under different tariff items
• Declare the end-use in semiconductor manufacturing to facilitate CBSA review