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Code 8421 39 · Heading 8421

Machines and equipment for filtering or purifying gases, excluding engine air filters, exhaust catalysts and particulate filters, and isotope separators

This code covers machines and equipment for filtering or purifying gases. It excludes isotope separators, air filters for combustion engines, and catalysts and particulate filters for cleaning or filtering combustion-engine exhaust gases.

For example

  • A machine for filtering or purifying non-air gases, not using a catalytic process
See the official tariff text

Official tariff text

Machinery and apparatus for filtering or purifying gases (excl. isotope separators and intake air filters for internal combustion engines, and catalytic converters and particulate filters for purifying or filtering exhaust gases from internal combustion engines)

How we got to this code

  1. XVI
  2. 84
  3. 8421
  4. 8421 39
Show the steps

Pick the 8-digit code

Pick the description that best matches your product.

Import duty on the codes below: 0.0–1.7%

4 codes below this one

Compare the sibling codes

See all 12 codes at this level

Classification decides the rate here: from 0.0% to 2.7%.

Selling to Norway, Great Britain and the United States

What they charge on arrival.

Norway, Great Britain and the United States use their own tariff lines under the 6-digit HS code. The rates below are what their customs charge on goods arriving from the EU. Match the goods against each country's own wording before you rely on a rate.

Norway

Duty free

  • Their lines1 Norwegian line

84.21.3900 Other

Norwegian tariff data checked Sept. 13, 2026.

Great Britain

Duty free

  • Their lines7 British lines

8421 39 15 00 With stainless steel housing, and with inlet and outlet tube bores with inside diameters

Northern Ireland follows other rules.

UK tariff data checked Sept. 13, 2026.

United States

10.0%

Estimated from published US measures

  • Their lines7 US lines
  • Entry dateSept. 17, 2026

8421.39.01.05 Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus

The US importer of record files the entry.

US tariff data checked Sept. 16, 2026.

See the 1 Norwegian line

Selling to Norway

Norway splits the 6-digit category its own way, so these are Norway's own lines under it, not this EU code. Check your product against their wording; what Norwegian customs charges is shown per line.

  • 84.21.3900

    Other

    Ordinary duty
    Duty free

Norwegian tariff data version 1.5/1.2, last checked Sept. 13, 2026.

Contains data from Norwegian Customs (data.toll.no), licensed under CC BY 4.0, adapted for display.

See the 7 British lines

Selling to Great Britain

What UK customs charges when goods like these arrive in Great Britain.

  • All 7 UK lines under this code

    They all have the same duty rates shown here.

    Ordinary duty
    Duty free

These rates apply in Great Britain. Different rules may apply for goods entering Northern Ireland.

UK tariff data version v4.0.1599, last checked Sept. 13, 2026.

Contains public sector information licensed under the Open Government Licence v3.0.

Source: UK Department for Business and Trade (data.api.trade.gov.uk).

See the 7 US lines

Selling to the United States

What US customs charges when goods like these arrive from the EU. The US importer of record files the entry and pays the duty.

  • 8421.39.01.05

    Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof, Filtering or purifying machinery and apparatus for gases, Other, Dust collection and air purification equipment, For machine tools of headings 8456 through 8465, inclusive

    General rate
    Free
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 8421.39.01.15

    Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof, Filtering or purifying machinery and apparatus for gases, Other, Dust collection and air purification equipment, Other

    General rate
    Free
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 8421.39.01.20

    Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof, Filtering or purifying machinery and apparatus for gases, Other, Industrial gas cleaning equipment, Electrostatic precipitators

    General rate
    Free
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 8421.39.01.30

    Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof, Filtering or purifying machinery and apparatus for gases, Other, Industrial gas cleaning equipment, Other

    General rate
    Free
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 8421.39.01.40

    Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof, Filtering or purifying machinery and apparatus for gases, Other, Gas separation equipment

    General rate
    Free
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 8421.39.01.60

    Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof, Filtering or purifying machinery and apparatus for gases, Other, Pneumatic fluid power filters, rated at 550 kPa or greater

    General rate
    Free
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

  • 8421.39.01.90

    Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof, Filtering or purifying machinery and apparatus for gases, Other

    General rate
    Free
    From the EU
    10.0% Estimated from published US measures US headings applied: 9903.05.39 Section 301 forced-labour action, 91 FR 47318 (memorandum 91 FR 47717), U.S. note 52 to subchapter III of chapter 99

Worked out for an entry on Sept. 17, 2026.

US tariff schedule 2026HTSRev19, last checked Sept. 16, 2026.

Last change we recorded: Revision 19 (2026), Sept. 16, 2026.

Anti-dumping and countervailing duties, US import taxes and customs fees are not included.

The descriptions above are the US tariff texts, which the United States publishes in English only.

Source: the US International Trade Commission's Harmonized Tariff Schedule (hts.usitc.gov), public domain, and the measures published in the Federal Register.

This is a planning estimate from the US Harmonized Tariff Schedule (revision shown) and the published Federal Register measures as of the date shown, for a shipment of EU origin. It is not a customs entry, legal advice or a broker's opinion, and tariffs.help is not a US-licensed customs broker. The US importer of record or their broker confirms the classification, origin, value and the duty due before filing.

Duty rates shown here are estimates, read from official EU / Danish, Norwegian and UK tariff data for orientation only. Confirm the current rate with Toldstyrelsen, TARIC, Norwegian Customs or the UK Online Trade Tariff before you file. The rate you pay can also depend on the country of origin. These are base customs duties only: import VAT, excise duties, anti-dumping duties and safeguard or quota measures are not included.