Electro-Pneumatic Proportional Valve for Crystal Puller Gas Control from Germany
Designed for Czochralski crystal growers, this proportional valve modulates argon gas flow based on real-time signals from temperature controllers during silicon boule pulling. Classified in 8481.80.9020 for its electro-pneumatic actuator responding proportionally to control signals in semiconductor material growth equipment. Ensures ultra-precise atmosphere control to prevent crystal defects.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
Import Tips
• Provide process flow diagrams showing valve integration in crystal growth systems to support 8481 classification over semiconductor machinery notes
• Declare flow rate range (e.g
• 0-100% proportional) and signal input specs (4-20mA) explicitly to distinguish from binary valves