Sourcing industrial fume scrubbers from China

UK duty on industrial fume scrubbers

Heading 8421 covers centrifuges and filtering or purifying machinery for liquids or gases. Industrial fume scrubbers sit within its gas purification family when their function and construction match the tariff description. The table gives candidate lines for complete apparatus and parts. The stainless-housing line has a specific connection-bore restriction; it is not a general code for stainless steel scrubbers.

Read from the UK Trade Tariff on 17 December 2026, all supplied lines carry 0% duty for goods from China. The supplied data lists no anti-dumping or countervailing duty, suspensions or attached import controls. Import VAT at 20% still applies.

Confirm the commodity code using the process gas, treatment method, housing and connection details, and whether you are importing complete machinery or parts. For the wider heading, see industrial dust collectors.

Specify the fumes and the wet treatment circuit

Describe the contaminants, inlet concentration, gas temperature, moisture, airflow and pressure available at the connection. Agree the outlet performance and the conditions under which it will be demonstrated. Ask the factory to explain its choice of packed tower, spray arrangement or other treatment method against your actual process.

For wet scrubbers, agree the casing, packing, seals, pump and pipe materials against both the fumes and the scrubbing liquor. Specify dosing, liquid circulation, mist elimination, drainage, cleaning access and replaceable components. Define whether the supply includes the fan, ductwork and controls, and who will install and commission the assembled system.

Confirm with the relevant authority whether powered scrubbers with moving parts fall under the Supply of Machinery (Safety) Regulations 2008 and which declaration and marking requirements apply in Great Britain. Request the declaration of conformity and check the proposed UKCA or CE marking. Agree a site commissioning test: HSE says installed extraction should follow the design, specification and manufacturer's instructions and meet specified technical performance.

Worked duty example

Illustrative example, not a quote: Illustrative order: a packaged wet scrubber for a small metal-finishing workshop under 8421 39 85 90, invoiced at £38,000 free on board, with £2,000 of freight and insurance to the UK. The customs value is £40,000. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £40,000, so it is £8,000. 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

Materials: compare the casing, lining, packing and seal specifications with the approved materials schedule; inspect joints and accessible surfaces for damage or poor bonding.

Wet circuit: witness a circulation and leak test; check spray distribution, pump operation, level controls, dosing connections and access to the mist eliminator.

Fan and controls: compare airflow and pressure results with the agreed operating duty; check rotation, vibration, guards, alarms and shutdown functions against the approved design.

Documents and arrival: match the nameplate and declaration to the delivered model; inspect supports, flanges and loose components for transit damage. Arrange quality inspection around the agreed tests.

What goes wrong

A scrubber selected only by nominal airflow can miss the contaminant chemistry or the resistance of the installed ductwork. Incompatible seals, uneven liquid distribution, blocked packing or an ineffective mist eliminator can undermine the agreed performance. Require test records stating the operating conditions, then verify performance after installation.

Wet treatment also creates spent liquor. Agree collection, drainage and disposal arrangements before ordering. In England, discharge of liquid effluent or waste water to surface water or the ground may need an environmental permit; check the proposed route before connecting a drain.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For machinery and equipment, see machinery imports.