Czochralski Crystal Puller Gas Control Valve
High-precision valve component for regulating argon or nitrogen gas in Czochralski crystal pullers used to grow pure silicon boules for semiconductor wafers. Classified under HTS 8481.90.9040 as a part of 8481.20 pressure-reducing valves tailored for semiconductor manufacturing processes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sold as part of a complete valve assembly set
Assembled appliance sets for semiconductor use may classify under complete valves rather than parts.
If for steam pressure regulation in float zone crystal growers
Specialized steam-regulating instruments for semiconductor processing go to Chapter 90.
If bulk imported for wafer fab machine integration
Unspecified machines for semiconductor manufacture encompass loose valve parts.
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Import Tips & Compliance
• Include detailed blueprints showing compatibility with 8481.20 valves to support classification
• Comply with ITAR/EAR if valve tech enables advanced semiconductor purity levels
• Test for leak rates below 10^-9 atm-cc/sec to satisfy import quality inspections
Related Products under HTS 8481.90.90.40
Semiconductor Wafer Processing Pressure Regulator Valve
A precision pressure-reducing valve designed specifically for controlling gas flow in semiconductor wafer processing equipment, such as crystal growers and pullers. It falls under HTS 8481.90.9040 as a part of valves from subheading 8481.20, optimized for high-purity environments in monocrystalline semiconductor boule production using Czochralski methods.
Wafer Slicing Saw Coolant Flow Control Valve
Valve part for precise coolant flow management in wafer slicing saws that cut monocrystalline semiconductor boules into thin wafers. It is a component of 8481.20 valves, falling under HTS 8481.90.9040 due to its role in semiconductor wafer preparation equipment.
Crystal Grinder Air Pressure Valve
Pneumatic pressure control valve for crystal grinders that shape semiconductor boules to exact wafer diameters and flats indicating conductivity. As a part of 8481.20 valves used in wafer preparation, it is classified in HTS 8481.90.9040.
Wafer Lapping Machine Slurry Valve
Specialized valve for metering abrasive slurry in wafer lappers and polishers that achieve flatness tolerances for semiconductor fabrication. It qualifies under HTS 8481.90.9040 as a part of 8481.20 valves in wafer preparation equipment.
Float Zone Crystal Grower Vacuum Valve
Vacuum control valve for float zone methods in growing high-purity semiconductor crystals from which wafers are sliced. Classified as HTS 8481.90.9040 for its role as a 8481.20 valve part in crystal grower equipment.
Gallium Arsenide Wafer Polisher Fluid Valve
Precision fluid regulation valve for polishers processing gallium arsenide wafers in compound semiconductor manufacturing. It is a part of 8481.20 valves, thus under HTS 8481.90.9040 per chapter statistical notes.