Other
Centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus, for liquids or gases; parts thereof: > Filtering or purifying machinery and apparatus for liquids: > Other
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Subheadings
Products classified under HTS 8421.29.00
Industrial Sand Filter for Water Treatment
A large-scale sand filter system designed to remove suspended solids from water in municipal or industrial treatment plants. It falls under HTS 8421.29.00 as other filtering machinery for liquids, distinct from oil/gas separators or fuel filters. Sand filters use layers of graded sand to trap particles through mechanical filtration.
Cartridge Filter Housing for Process Water
Stainless steel housing that holds replaceable cartridge filters to remove fine particulates from industrial process water. Classified in HTS 8421.29.00 as other apparatus for purifying liquids through mechanical filtration. Commonly used in food/beverage and pharmaceutical manufacturing.
Bag Filter System for Chemical Processing
Multi-bag filtration system that uses fabric bags to capture solids from corrosive chemical liquids in industrial processes. HTS 8421.29.00 covers this as other purifying apparatus for liquids via mechanical separation. Essential for protecting downstream equipment from contaminants.
Inline Disc Filter for Wastewater
Rotating disc filter that continuously filters wastewater through fine mesh screens for tertiary treatment. Falls under HTS 8421.29.00 for other liquid filtering machinery, excluding oil filters. Used in sewage treatment plants for effluent polishing.
Membrane Filter Module for Ultrapure Water
Cross-flow membrane modules (microfiltration/ultrafiltration) producing ultrapure water for semiconductor fabrication. HTS 8421.29.00 includes these as other purifying apparatus for liquids, critical for removing submicron particles. Excludes reverse osmosis in some contexts.
Vibratory Screen Separator for Slurry
Vibrating screen machine that separates solids from liquid slurries using mesh screens in mining and food processing. Classified HTS 8421.29.00 as other liquid filtering apparatus through mechanical sieving. Handles high-volume wet separation.
Plate and Frame Filter Press for Sludge
Hydraulic filter press using cloth-covered plates to dewater industrial sludge and wastewater solids. HTS 8421.29.00 for other liquid purifying machinery via pressure filtration. Common in mining, chemical, and municipal sludge handling.
Depth Cartridge Filter for Hydraulic Fluids
High-capacity depth filters in cartridge form for removing contaminants from hydraulic and lubricating oils in machinery. While oil-related, classified HTS 8421.29.00 as other liquid filters (not intake/engine specific). Used in heavy equipment maintenance.
Continuous Rotary Vacuum Filter Drum
Rotary vacuum drum filter for continuous filtration of liquids in mineral processing and chemical plants. HTS 8421.29.00 covers vacuum-assisted liquid filtering apparatus excluding centrifuges. Provides high throughput for slurry dewatering.
Microfiltration Ceramic Element System
Ceramic membrane-based microfiltration system for purifying liquids in food, beverage, and biotech applications. Classified HTS 8421.29.00 as other filtering machinery for liquids using porous ceramic media. Withstands high temperatures and aggressive cleaning.
Pressure Leaf Filter for Edible Oils
Vertical pressure leaf filter using stainless steel leaves coated with filter aid for clarifying edible oils and fats. HTS 8421.29.00 for other liquid purifying apparatus in food processing. Removes waxes, gums, and color bodies.
Woven Wire Mesh Filter for Cooling Water
Stainless steel woven wire mesh strainer for removing debris from industrial cooling water systems. Simple mechanical filtering apparatus under HTS 8421.29.00 for other liquid filters. Prevents clogging in heat exchangers and chillers.
Self-Cleaning Backwash Filter for Irrigation
Automatic backwashing screen filter that cleans itself to maintain irrigation water quality in agriculture. HTS 8421.29.00 as other filtering machinery for liquids removing sediment. Essential for drip/micro irrigation systems.
Activated Carbon Filter Vessel for Beverage Processing
Carbon steel pressure vessel filled with granular activated carbon for decolorizing and purifying liquids in beverage production. Adsorption purification apparatus under HTS 8421.29.00 for other liquid treatment. Used for water, beer, and liquor polishing.
Magnetic Separator Filter for Ferrous Contaminants
Pipeline magnetic separator that captures ferrous particles from liquids in machining and hydraulic systems. Classified HTS 8421.29.00 as other purifying apparatus using magnetic filtration. Prevents wear in pumps and valves.