# HTS 8421: Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof:

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Source: [2026 HTS Revision 21 (October 9, 2026)](https://hts.usitc.gov/search?query=8421). Additional duties by country of origin may apply; estimate a shipment's full duty with the tariff calculator: https://geopax.app/tariffs/calculator

## 8421: Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof:

| Code | Description | General | Special | Column 2 | Units |
| --- | --- | --- | --- | --- | --- |
| 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 | Free |  | 25% | No. |
| 8421.12.00.00 |     Clothes-dryers | Free |  | 25% | No. |
| 8421.19.00.00 |     Other | 1.3% | Free (A,AU,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 25% | No. |
|  |   Filtering or purifying machinery and apparatus for liquids: |  |  |  |  |
| 8421.21.00.00 |     For filtering or purifying water | Free |  | 35% | No. |
| 8421.22.00.00 |     For filtering or purifying beverages other than water | Free |  | 35% | No. |
| 8421.23.00.00 |     Oil or fuel filters for internal combustion engines | 2.5% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | No. |
| 8421.29.00 |     Other | Free |  | 35% |  |
| 8421.29.00.05 |       Refrigerant recovery and recycling units | Free |  | 35% | No. |
|  |       Other: | Free |  | 35% |  |
| 8421.29.00.15 |         Oil-separation equipment | Free |  | 35% | No. |
|  |         Other: | Free |  | 35% |  |
| 8421.29.00.40 |           Hydraulic fluid power filters, rated at 1,000 kPa or greater | Free |  | 35% | No. |
| 8421.29.00.65 |           Other | Free |  | 35% | No. |
|  |   Filtering or purifying machinery and apparatus for gases: |  |  |  |  |
| 8421.31.00.00 |     Intake air filters for internal combustion engines | 2.5% | Free (A,AU,B,BH,C,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) | 35% | No. |
| 8421.32.00.00 |     Catalytic converters or particulate filters, whether or not combined, for purifying or filtering exhaust gases from internal combustion engines | Free |  | 35% | No. |
| 8421.39.01 |     Other | Free |  | 35% |  |
|  |       Dust collection and air purification equipment: | Free |  | 35% |  |
| 8421.39.01.05 |         For machine tools of headings 8456 through 8465, inclusive | Free |  | 35% | kg |
| 8421.39.01.15 |         Other | Free |  | 35% | kg |
|  |       Other: | Free |  | 35% |  |
|  |         Industrial gas cleaning equipment: | Free |  | 35% |  |
| 8421.39.01.20 |           Electrostatic precipitators | Free |  | 35% | No. |
| 8421.39.01.30 |           Other | Free |  | 35% | No. |
| 8421.39.01.40 |         Gas separation equipment | Free |  | 35% | No. |
|  |         Other: | Free |  | 35% |  |
| 8421.39.01.60 |           Pneumatic fluid power filters, rated at 550 kPa or greater | Free |  | 35% | No. |
| 8421.39.01.90 |           Other | Free |  | 35% | 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 | Free |  | 25% | No. |
| 8421.91.40.00 |       Furniture designed to receive the clothes-dryers of subheading 8421.12 | Free |  | 25% | No. |
| 8421.91.60.00 |       Other | Free |  | 25% | kg |
| 8421.99.01 |     Other | Free |  | 35% |  |
| 8421.99.01.40 |       Parts of machinery and apparatus for filtering or purifying water | Free |  | 35% | kg |
| 8421.99.01.80 |       Other | Free |  | 35% | kg |