Sourcing compressed-air filter elements from China
Compressed-air filter elements from China have a checked UK duty range of 0% to 0% under heading 8421. Confirm the parts classification and supply safe products with adequate safe-use information for workplace use. Match the element to the housing and verified filtration performance. Cambridge China Bridge sources compressed-air filter elements.
UK duty on compressed-air filter elements
Heading 8421 covers filtering and purifying apparatus for liquids or gases and their parts. Replacement cartridges are usually classified as parts; loose filter paper or felt can fall elsewhere. This guide focuses on finished compressed-air filter elements. The table includes complete apparatus only to help distinguish a replacement element from a filter supplied with its housing.
Read from the UK Trade Tariff on 3 October 2026, every supplied commodity line carried 0% duty for goods from China. The supplied records show no anti-dumping or countervailing duty, suspensions or attached import controls. Import VAT at 20% still applies; see import duty and VAT.
Confirm the commodity code using the element drawing, materials, function and parent housing specification. Many replacement elements are candidates for 8421 99 90 99, but the specified apparatus parts line needs separate checking. See the wider filtration equipment guide for complete equipment.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Other filtration parts, including many replacement compressed-air filter elements | 8421 99 90 99 | 0% | None |
| Parts for specified stainless-steel gas filters; check the parent apparatus | 8421 99 10 00 | 0% | None |
| Complete air filtering apparatus, for comparison with replacement elements | 8421 39 25 90 | 0% | None |
| Specified stainless-steel gas filtering apparatus, supplied with housing | 8421 39 15 00 | 0% | None |
Specify the housing fit and filtration function
State whether the element removes particles, coalesces oil aerosols or adsorbs oil vapour. Agree the media, support cage, end-cap construction, adhesive and seal material. Supply a housing drawing and an approved sample showing the locating features, sealing faces and flow direction. Record operating pressure, temperature, airflow and the acceptable pressure drop under agreed test conditions.
Ask for performance reports identifying the exact element and test housing. Agree how oil carry-over, particle removal and pressure drop will be checked. Keep advertised filtration claims within the evidence supplied. A dimensional match alone does not establish equivalent filtration performance.
HSE says articles supplied for workplace use must be safe so far as reasonably practicable and accompanied by adequate safe-use information. Request installation and replacement instructions. For a claimed spare part within the pressure-equipment guidance, retain documents showing its intended use; ask testing and certification to help review the product scope.
Worked duty example
Illustrative example, not a quote: Illustrative order of 1,000 replacement compressed-air filter elements under 8421 99 90 99, invoiced at £8,000 free on board, with £2,000 of freight and insurance to the UK. The customs value is £10,000. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £10,000, so it is £2,000. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.
Inspection checklist
Fit: trial-fit arrival samples in the intended housing and check seating, locating features, seal compression and flow direction against the approved drawing.
Construction: inspect media damage, support-cage distortion, end-cap bonding, loose fibres and seal condition against the approved sample.
Performance: compare sampled elements with the agreed filtration and pressure-drop results in the specified housing and operating conditions.
Identification: match element references, filtration function, batch identification and packaging to the order. Keep elements dry and protected from crushing; plan quality inspection before dispatch.
What goes wrong
An element can fit the housing yet let air bypass the media because its seal or end cap differs. A changed media pack can also increase pressure drop or leave oil carry-over above the agreed result. Approve construction and performance together, and require approval before the factory substitutes materials.
Confusing an oil-aerosol coalescing element with an oil-vapour adsorbing element creates the wrong specification. Generic reports and reference-number crossovers can hide that difference. Hold affected stock when arrival checks disagree with the approved sample, and request a documented investigation before release.
Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification.
Frequently asked questions
What is the UK import duty on compressed-air filter elements from China?
The supplied heading 8421 records show 0% duty on all listed lines, with no anti-dumping or countervailing duty. Confirm the exact parts code. Import VAT at 20% still applies.
What commodity code covers replacement compressed-air filter elements?
Many finished replacement cartridges are candidates for 8421 99 90 99. Check the parent apparatus and construction, because specified apparatus parts and loose filter media need separate classification.
Can I buy an element using only the original part number?
Use the part number as a starting point. Also agree a drawing, seal material, filtration function and performance evidence, then trial-fit a sample in the intended housing.
What should I inspect when the filter elements arrive?
Check housing fit, seals, end-cap bonding, media damage, support cages and identification. Compare sampled filtration performance and pressure drop with the agreed results.