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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If classified as a complete semiconductor processing machine
Fully assembled crystal pullers or wafer grinders are under dedicated semiconductor headings.
If imported as valve-integrated units
Hydraulic accumulators with valves may classify as other hydraulic valves/appliances.
If basic uncoated pressure vessels without accumulator function
Plain steel reservoirs shift to Chapter 73 for reservoirs over 20 liters.
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Import Tips & Compliance
• Ensure hydraulic fluid compatibility certification to comply with EPA import regs
• Label with maximum working pressure (MWP) and provide proof of semiconductor end-use
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.
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.
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.
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.