Float Zone Optical Fiber Preform Grower
A float zone machine employs zone melting to produce ultra-pure silica rods or boules for optical fiber preforms by floating a molten zone along a polycrystalline rod. It achieves higher purity than Czochralski for low-loss fibers. Falls under HTS 8475.21.00.00 for specialized optical fiber preform production.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If for other hot glass working not optical fiber specific
General hot glass working machines excluded from 8475.21 optical fiber provision.
If when integrated with industrial electric heating elements
Parts of industrial furnaces may apply if not complete preform making machine.
If for testing preform quality rather than production
Testing machines for optical properties classified in Chapter 90.
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Import Tips & Compliance
• Include process diagrams showing zone melting for fiber-grade silica to distinguish from semiconductor crystal growers
• Label as 'optical fiber preform equipment' clearly; mislabeling risks reclassification to semiconductor machinery
• Check for dual-use restrictions on high-purity melting tech under export control regulations
Related Products under HTS 8475.21.00.00
Preform Etching Station
Automated hydrofluoric acid etching station removes surface defects from optical fiber preforms, improving fiber strength. Precise chemical dosing and rinsing. HTS 8475.21.00.00 for preform processing machinery.
Optical Preform Grinder
Precision grinder shapes ends of optical fiber preforms to exact geometry for fiber drawing process, with diamond tooling for silica glass. Maintains flatness critical for draw quality. Classified HTS 8475.21.00.00.
Integrated Preform Manufacturing Line
Complete turnkey line combining VAD deposition, sintering, dehydration, and collapsing for high-volume optical fiber preform production. PLC controlled with recipe management. HTS 8475.21.00.00 for complete optical fiber making systems.
Fluorine-Doped Preform Plasma Processor
Plasma processor dopes optical fiber preforms with fluorine using downstream microwave plasma for depressed cladding index profiles in dispersion-shifted fibers. Critical for DWDM systems. Under HTS 8475.21.00.00.
Fiber Preform Dehydration Oven
Oven removes hydroxyl impurities from soot preforms using chlorine gas at elevated temperatures, essential for low-loss optical fibers. Controlled humidity environment. Specialized under HTS 8475.21.00.00.
Czochralski Crystal Puller for Optical Fiber Preforms
This machine uses the Czochralski method to grow high-purity silica monocrystalline boules from which optical fiber preforms are sliced. It melts silica in a crucible and slowly pulls a seed crystal to form the boule under precise temperature control. Classified under HTS 8475.21.00.00 as it is specifically designed for producing preforms used in optical fiber manufacturing.