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SITCSection 7
U.S. imports of parts of filtering or purifying machinery and apparatus (SITC 74395) totaled $203.9M in April 2026, traded with 71 countries.
Importers of Parts of Filtering or Purifying Machinery and Apparatus paid $20.3M in duties in April 2026 — an effective duty rate of 14% on $149.1M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataFiltering and purifying machinery parts serve critical roles across water treatment, petroleum refining, semiconductor fabrication, and HVAC industries, making accurate classification essential for duty and trade-remedy purposes. The heading captures components such as filter housings, membranes, and media frames that are identifiable as belonging to filtering or purifying equipment rather than to centrifuges or other separation machinery. Trade professionals should document the parent machine's function clearly, as the boundary between filtering-equipment parts and centrifuge parts (SITC 74391) is a common point of customs scrutiny.
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Technical drawings, OEM part numbers, and the parent machine's operating manual are the most persuasive supporting documents. A binding ruling request from CBP can provide advance certainty when a component could plausibly serve either a filtering or a centrifugal function.
Membranes designed specifically for use in industrial filtration or purification units are generally classified as parts of filtering machinery. However, membranes with broad cross-industry applications may be classified under their constituent material heading instead, so a fact-specific analysis is advisable.
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Monthly import values over time