Gas separation equipment
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 > Other: > Gas separation equipment
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]
Products classified under HTS 8421.39.01.40
PSA Oxygen Concentrator Generator
This pressure swing adsorption (PSA) system uses molecular sieves to separate oxygen from ambient air by selectively adsorbing nitrogen, producing high-purity oxygen for medical or industrial use. It falls under HTS 8421.39.0140 as gas separation equipment for purifying and isolating oxygen from air.
Membrane Nitrogen Generator Module
Hollow fiber membrane modules separate nitrogen from air by allowing oxygen and other gases to permeate through semi-permeable membranes under pressure. Classified under HTS 8421.39.0140 for its specialized gas separation function in industrial inert gas supply.
Carbon Molecular Sieve Nitrogen PSA System
This PSA unit employs carbon molecular sieves with precise pore sizes to kinetically separate nitrogen from oxygen in compressed air, yielding high-purity N2 for food packaging and electronics. HTS 8421.39.0140 covers this dedicated gas separation machinery.
Industrial Helium Recovery PSA Unit
Pressure swing adsorption system recovers and purifies helium from natural gas streams or mixed gas exhaust by preferentially adsorbing impurities. Falls under HTS 8421.39.0140 as specialized gas separation equipment for rare gas recovery.
CO2 Capture Membrane Separator
Polymeric membrane modules selectively permeate CO2 from flue gas or biogas streams, enabling carbon capture for environmental control. Classified in HTS 8421.39.0140 for gas separation via selective permeation technology.
VPSA Vacuum Pressure Swing Oxygen Plant
Vacuum pressure swing adsorption plant produces tonnage oxygen from air using zeolite adsorbents, with vacuum regeneration for energy efficiency in steelmaking. HTS 8421.39.0140 applies to this large-scale gas separation apparatus.
Biogas Methane Membrane Separation Skid
Integrated skid with multiple membrane stages upgrades biogas by separating methane from CO2, H2S, and water vapor for pipeline-quality RNG. Falls under HTS 8421.39.0140 as gas separation equipment for renewable energy.
Rare Gas Xenon Recovery Unit
Cryo-adsorption hybrid system recovers xenon from air separation plant waste streams using specialized activated carbon cold traps. HTS 8421.39.0140 for trace rare gas separation equipment.
Hydrogen Purification PSA Purifier
Multi-bed PSA purifier removes impurities from steam methane reformate, achieving 99.999% H2 purity for fuel cell and electronics applications. Under HTS 8421.39.0140 as gas separation for ultra-high purity hydrogen.
Natural Gas Liquids NGL Membrane Separator
Membrane system removes heavy hydrocarbons and water from natural gas to meet pipeline specs, preventing liquid dropout. HTS 8421.39.0140 covers gas separation for petroleum gas conditioning.