PTFE Diaphragm Valve for Crystal Grower Fluid Control
A hand-operated diaphragm valve with PTFE (Teflon) body for corrosive chemical handling in Czochralski crystal pullers during silicon boule growth. Classified under HTS 8481.90.5000 as parts of other materials (plastics like PTFE) for hand-operated appliances in semiconductor processing.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If of copper or aluminum
Non-ferrous metal valves like copper are under 8481.90.2000, separate from plastic 'other materials'.
If sold as unfinished plastic component without valve function
Unassembled plastic articles without specific valve features fall into Chapter 39 plastics.
If part of semiconductor wafer processing heat exchangers
Parts for semiconductor equipment may shift to 8419.90 if tied to heat exchange in Chapter 84.
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Import Tips & Compliance
• Provide FDA or semiconductor-grade PTFE certification to confirm 'other materials' status
• Document end-use in wafer manufacturing to differentiate from general industrial valves
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