Gas-Charged Piston Accumulator for Wafer Polishers
Specifically designed gas-charged piston accumulators for maintaining consistent pressure in semiconductor wafer lappers and polishers during surface flattening. Classified in HTS 8479.89.95.65 under hydraulic accumulators for wafer preparation equipment. Critical for achieving dimensional tolerances in semiconductor fabrication.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If test equipment components with sensors
Parts of testing machines for flatness shift to Chapter 90.
If linear acting hydraulic cylinders mistaken for accumulators
Pure cylinders without storage function classify under 8412.
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Import Tips & Compliance
• Provide cleanroom compatibility certs (ISO 14644) for fab imports
• Detail gas type (N2 typical) in commercial invoice
• Watch for reclassification if shipped pre-charged with hazardous gases
Related Products under HTS 8479.89.95.65
Diaphragm Hydraulic Accumulator
Diaphragm accumulators employ a flexible diaphragm for fluid-gas separation, suited for compact spaces in wafer slicing saws and polishers during semiconductor wafer preparation. This product is under HTS 8479.89.95.65 for hydraulic accumulators in semiconductor manufacturing apparatus. They maintain system pressure and compensate for leakage in precision grinding equipment.
Bladder-Type Hydraulic Accumulator
A bladder-type hydraulic accumulator stores hydraulic energy using a flexible bladder to separate fluid from gas, commonly used in industrial machinery for energy storage and shock absorption. It falls under HTS 8479.89.95.65 as a hydraulic accumulator, classified as other machines and mechanical appliances having individual functions not elsewhere specified. This subheading specifically covers hydraulic accumulators for semiconductor manufacturing equipment like wafer processing tools.
Piston-Type Hydraulic Accumulator
Piston-type hydraulic accumulators use a movable piston to separate hydraulic fluid from pre-charged gas, ideal for high-pressure applications in crystal growers for semiconductor boule production. Classified under HTS 8479.89.95.65 as hydraulic accumulators within other machines for semiconductor manufacturing and testing. They provide pulsation dampening and emergency power in wafer fabrication equipment.
High-Pressure Weight-Loaded Hydraulic Accumulator
Weight-loaded accumulators use mechanical weights for gasless energy storage, applied in heavy-duty crystal grinders for semiconductor boule preparation. Falls under HTS 8479.89.95.65 as hydraulic accumulators for semiconductor growth and processing machines. They offer reliable performance in high-force grinding operations.