High Vacuum Pump Bellows Valve
Bellows-sealed isolation valves control gas flow in vacuum pump inlet manifolds for semiconductor wafer grinders. HTS 8414.90.91.40 covers it as a part of vacuum pumps in wafer preparation equipment. Ensures all-metal, bakeable seals for UHV conditions.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If imported separately for general vacuum service
Non-pump-specific valves go to valves and similar articles.
If dedicated to boule grinder vacuum extraction
Wafer prep grinders/lappers have precise statistical categories.
If as component in complete wafer polishing machine
Parts of unfinished semiconductor machines classify under 8479.
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Import Tips & Compliance
• Specify bakeout temperature ratings (>200°C) to prove semiconductor fab suitability
• Pair with pump model affidavits for binding ruling requests if uncertain
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