Float Zone Crystal Puller Butterfly Valve
Precision hand-operated cast iron butterfly valve for float zone crystal growers producing high-purity silicon wafers, under HTS 8481.80.3030 per statistical note (a)(i). Regulates process gases during zone refining. Vacuum-rated construction.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for epitaxy reactor gas control
Epi-specific process control valves separate.
If part of complete crystal growth machine
Machines for semiconductor material manufacture classified as complete units.
If replacement parts for installed valves
Aftermarket parts use dedicated parts headings.
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Import Tips & Compliance
• Reference statistical note (a)(i) crystal pullers explicitly; include vacuum specs and gas compatibility certs
• Distinguish from atmospheric pressure valves
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