Stainless Steel Needle Valve for Float Zone Crystal Puller
Precision steel needle valve part for fine flow control of argon gas in float zone crystal pullers producing monocrystalline semiconductor material. HTS 8481.90.3000 for iron/steel parts of hand-operated appliances in wafer manufacturing equipment. Essential for zone refining purity.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If solenoid or pneumatic operated
Process control valves excluding hand-operated types use other subheadings.
If for laboratory crystal growth
Lab-scale instruments classify in Chapter 90, not industrial semiconductor machines.
If seamless steel tube fitting
Needle-like fittings without true valve mechanism go to steel pipes/tubes.
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Import Tips & Compliance
• Specify RF zone process compatibility; provide pressure ratings >10 bar; pitfall: classification as labware if not tied to industrial equipment
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