U.S. imports of Filters and Purifying Machinery for Gases, Not Elsewhere Specified (SITC 74369) totaled $638.5M in August 2026, imported from 89 countries.
Importers of Filters and Purifying Machinery for Gases, Not Elsewhere Specified paid $35.0M in duties in August 2026, an average duty rate of 5.61% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Filters and Purifying Machinery for Gases, Not Elsewhere Specified imports of $638.5M in August 2026 ran 19% above the year-to-date monthly average of $537.2M.
Last updated: August 2026 dataGas filtration and purification equipment not dedicated to engine intake air — including industrial dust collectors, HEPA filtration systems, activated-carbon gas scrubbers, compressed-air dryers, and process gas purifiers — serves environmental compliance, clean-room manufacturing, chemical processing, and industrial hygiene applications. The NES scope means intake air filters for internal combustion engines are explicitly excluded. Importers of gas filtration equipment from China should assess Section 301 tariff exposure, which varies by the specific HTS subheading applicable to the equipment.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
18.3K import shipments a month
Yes — dust collectors, baghouse filters, and similar equipment designed to remove particulates from industrial gas or air streams (outside of engine intake applications) fall within the NES gas filtration heading. Classification is based on the equipment's function of filtering or purifying a gas stream in an industrial or process context, not on the specific filter media used.
Compressed-air dryers that remove moisture or contaminants from compressed air streams are generally classified as gas purification apparatus under this heading. However, if the dryer operates by refrigeration or desiccant adsorption and is more accurately described as a refrigerating or drying machine, it may fall under a different machinery heading. The principal function and design of the specific unit should be reviewed with a licensed customs broker before entry.
Basic heading 39 of 642 in section 7
Basic heading 74369 · $638.5M of $172.0B
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ImportsExports
Imports
$638.5MYoY · free account
Exports
$329.8MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $6.1B of Filters and Purifying Machinery for Gases, Not Elsewhere Specified.
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.
Imports · August 2026
origin
Mexico and Canada together supply 58% of it. China pays 26.8% duty; Canada 0.2%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.