8421.91Centrifuges, including centrifugal dryers
Also written 842191
HTS Code 8421.91 covers any article best defined as Machinery and Mechanical Appliances; Electrical Equipment; Parts Thereof; Sound Recorders and Reproducers, Television Image and Sound Recorders and Reproducers, and Parts and Accessories of Such ArticlesNuclear reactors, boilers, machinery and mechanical appliances; parts thereofCentrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof:Parts:Of centrifuges, including centrifugal dryers: in the Harmonized Tariff Schedule — covering 3 sub-classifications.
Tariff updates
Recent US tariff actions that name 8421.91 or its heading.
- Dec 18, 2025 · PublishedUS cuts reciprocal tariff on Swiss and Liechtenstein goods to 15% all-in, exempts certain products
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Relevant HTS Notes
Official USITC notes that may affect classification under HTS 8421.91.
Related CROSS Rulings for HTS 8421.91
CBP classification rulings related to 8421.91. Open a ruling to read how Customs classified a similar product.
The tariff classification of parts of a centrifuge system from China
What does HTS code 8421.91 cover?
HTS code 8421.91 covers centrifuges, including centrifugal dryers (Of centrifuges, including centrifugal dryers:), classified under Chapter 84 (Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof) in the US Harmonized Tariff Schedule. There are 3 more specific sub-classifications under this code.
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