Hand-Operated Relief Valve for Wafer Polisher Tanks
Adjustable hand-operated bronze relief valve for overpressure release in chemical tanks of wafer polishers during semiconductor surface preparation. Classified in HTS 8481.80.5090 for other hand-operated valves.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If automatic pressure-reducing type
Thermostatic/pressure-regulating valves have separate Chapter 84 headings.
If imported solely as parts for polisher rebuild kits
Valve parts for semiconductor machines classify under parts provisions.
If with integrated electronic pressure indicators
Measuring instruments with valves shift to Chapter 90 for testing apparatus.
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Import Tips & Compliance
• Provide setpoint adjustment range docs to confirm hand-operated status vs automatic
• Avoid declaring as 'pressure-reducing' if manual only, to prevent heading 8481.40 shift
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