Heading 8421: Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof
In chapter 84, Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof. 14 rate lines, laid out as HTS Revision 20 (2026) prints them.
| HTS number | Description | Units | General | Special | Column 2 |
|---|---|---|---|---|---|
| 8421 | Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: | ||||
| Centrifuges, including centrifugal dryers: | |||||
| 8421.11.00.00 | Cream separators | No. | Free | 25% | |
| 8421.12.00.00 | Clothes-dryers | No. | Free | 25% | |
| 8421.19.00.00 | Other | No. | 1.3% | Free (A,AU,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 25% |
| Filtering or purifying machinery and apparatus for liquids: | |||||
| 8421.21.00.00 | For filtering or purifying water | No. | Free | 35% | |
| 8421.22.00.00 | For filtering or purifying beverages other than water | No. | Free | 35% | |
| 8421.23.00.00 | Oil or fuel filters for internal combustion engines | No. | 2.5% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8421.29.00 | Other | Free | 35% | ||
| 8421.29.00.05 | Refrigerant recovery and recycling units | No. | |||
| Other: | |||||
| 8421.29.00.15 | Oil-separation equipment | No. | |||
| Other: | |||||
| 8421.29.00.40 | Hydraulic fluid power filters, rated at 1,000 kPa or greater | No. | |||
| 8421.29.00.65 | Other | No. | |||
| Filtering or purifying machinery and apparatus for gases: | |||||
| 8421.31.00.00 | Intake air filters for internal combustion engines | No. | 2.5% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% |
| 8421.32.00.00 | Catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines | No. | Free | 35% | |
| 8421.39.01 | Other | Free | 35% | ||
| Dust collection and air purification equipment: | |||||
| 8421.39.01.05 | For machine tools of headings 8456 through 8465, inclusive | kg | |||
| 8421.39.01.15 | Other | kg | |||
| Other: | |||||
| Industrial gas cleaning equipment: | |||||
| 8421.39.01.20 | Electrostatic precipitators | No. | |||
| 8421.39.01.30 | Other | No. | |||
| 8421.39.01.40 | Gas separation equipment | No. | |||
| Other: | |||||
| 8421.39.01.60 | Pneumatic fluid power filters, rated at 550 kPa or greater | No. | |||
| 8421.39.01.90 | Other | kg | |||
| Parts: | |||||
| 8421.91 | Of centrifuges, including centrifugal dryers: | ||||
| 8421.91.20.00 | Drying chambers for the clothes-dryers of subheading 8421.12 and other parts of clothes-dryers incorporating drying chambers | No. | Free | 25% | |
| 8421.91.40.00 | Furniture designed to receive the clothes-dryers of subheading 8421.12 | No. | Free | 25% | |
| 8421.91.60.00 | Other | kg | Free | 25% | |
| 8421.99.01 | Other | Free | 35% | ||
| 8421.99.01.40 | Parts of machinery and apparatus for filtering or purifying water | kg | |||
| 8421.99.01.80 | Other | kg |
Rates are quoted as printed. Each 8-digit number opens its own page with footnotes and cited chapter 99 headings.
Watch lines in heading 8421
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- 9903.90.08 cited by 1 line
What this page leaves to your broker
This page quotes the schedule. It does not add the rates together, and it does not say whether a chapter 99 heading applies to a shipment: that turns on the country of origin, the dates and the U.S. notes to chapter 99. Section 301, Section 232 and other chapter 99 measures list the goods they cover in those notes and in Federal Register notices, so a line can be covered by a heading its footnotes never cite. A licensed customs broker makes the determination.
Built September 29, 2026 from HTS Revision 20 (2026) (USITC release 2026HTSRev20, published September 23, 2026, current since September 28, 2026). The schedule changes often; USITC's own site always has the current text.