Semiconductor Crystal Grower Butterfly Valve
Specialized hand-operated cast iron butterfly valve for Czochralski crystal puller systems in silicon wafer manufacturing, HTS 8481.80.3030 butterfly type. Controls argon purge gas flow during monocrystalline boule growth per statistical notes. Designed for ultra-high purity environments.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for general chemical vapor deposition processes
CVD-specific process valves have separate provisions.
If integrated with crystal growth monitoring
Apparatus combining valves with instruments classify in Chapter 90.
If valve bodies without operating mechanisms
Parts imported separately from hand-operating components.
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Import Tips & Compliance
• Provide statistical note reference and process description for favorable treatment; ensure particle and outgassing specs documented
• Differentiate from standard HVAC valves in entry paperwork
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