Pneumatic Diaphragm Valve for Gas Delivery in Crystal Pullers
Diaphragm valve with pneumatic actuator for controlling process gases in Czochralski crystal pullers during monocrystalline silicon boule production. Classified in HTS 8481.80.9040 for other pneumatic actuated valves used in semiconductor material growth equipment. Provides zero-dead-volume flow control essential for purity.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If solenoid or electric actuation
Solenoid valves shift to electric subcategory regardless of diaphragm design.
If when integrated into complete semiconductor gas cabinet systems
Assembled semiconductor-specific apparatus may classify under finished machinery headings.
If configured as check valve function
Pure check valves without actuators fall under pressure-regulating subheading.
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Import Tips & Compliance
• Provide evidence of semiconductor end-use for potential duty relief; test pneumatic actuators for leak rates <10^-9 sccs He; label with Cv values and pressure ratings
Related Products under HTS 8481.80.90.40
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