Brass Non-Return Valve for Crystal Puller Gas Systems from United States
A brass non-return valve rated above 850 kPa for argon or nitrogen gas lines in Czochralski crystal pullers. It ensures unidirectional gas flow to maintain ultra-pure monocrystalline silicon boule growth. Classified under tariff item 8481.30.00 as a check valve of copper alloy.
Duty Rate — United States → Canada
0%
Import Tips
• Provide technical datasheets showing the valve's pressure rating and gas compatibility to support classification
• Confirm the brass alloy meets Canadian standards for gas service
• If the valve is part of a larger crystal puller system, consider whether it should be classified with the machine under Section XVI Note 4