Company lists · Data refreshed September 2026

Top 25 Membrane filtration companies based in the United Kingdom

Name: Membrane filtration companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 124 companies tracked

RevenueBase identified 124 membrane filtration companies headquartered in the United Kingdom as of September 2026 and tracks 1,563 professional contacts across them, including 755 with verified work emails. London is the largest hub.

This list covers membrane filtration companies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

124Companies

1,563Contacts tracked

755Verified emails

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The 25 largest membrane filtration companies based in the United Kingdom

Ranked by team size

Top 25 of 124 membrane filtration companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to membrane filtration companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Porvair Filtration Group	Partial evidence	Fareham, United KingdomHQ checked Sep 20, 2026	501-1,000	245 contacts →
	Partial evidence “Porvair Filtration Group is a fast-growing, international market leader in the design and manufacture of high performance, specialised components and assemblies for applications…” Source: RevenueBase Database · checked Sep 20, 2026
2	Russell Finex LTD	Partial evidence	Feltham, United KingdomHQ checked Sep 20, 2026	501-1,000	179 contacts →
	Partial evidence “Global Sieving and Filtration Specialists Russell Finex assure and enhance the reputation of companies in almost every process industry throughout the world.” Source: RevenueBase Database · checked Sep 20, 2026
3	Amazon Filters LTD	Partial evidence	Camberley, United KingdomHQ checked Sep 20, 2026	201-500	144 contacts →
	Partial evidence “Amazon Filters Ltd is one of Europe’s leading filtration equipment manufacturers.” Source: RevenueBase Database · checked Sep 20, 2026
4	AAF AIR Filters	Partial evidence	Cramlington, United KingdomHQ checked Sep 20, 2026	51-200	127 contacts →
	Partial evidence “AAF International, the world’s largest manufacturer of air filtration solutions, operates production, warehousing and distribution facilities in 22 countries across four…” Source: RevenueBase Database · checked Sep 20, 2026
5	Walker Filtration Limited	Partial evidence	Washington, United KingdomHQ checked Sep 20, 2026	201-500	94 contacts →
	Partial evidence “Walker Filtration designs, develops and manufactures a comprehensive range of high quality Compressed Air and Gas Filtration and Drying solutions for a wide range of industrial…” Source: RevenueBase Database · checked Sep 20, 2026
6	Salt Separation Services Limited	Indirect evidence	Rochdale, United KingdomHQ checked Sep 20, 2026	51-200	80 contacts →
	Indirect evidence “Salt Separation Services Limited is an independent water treatment company specialising in the design, manufacture, installation and commissioning of water treatment systems.” Source: RevenueBase Database · checked Sep 20, 2026
7	Envirogen Group	Partial evidence	Alfreton, United KingdomHQ checked Sep 20, 2026	201-500	75 contacts →
	Partial evidence “Envirogen Group is a global leader in industrial water treatment and process filtration solutions.” Source: RevenueBase Database · checked Sep 20, 2026
8	Fileder Filter Systems	Indirect evidence	Maidstone, United KingdomHQ checked Sep 20, 2026	51-200	53 contacts →
	Indirect evidence “In short, we’re 'easy to deal with'.” Source: RevenueBase Database · checked Sep 20, 2026
9	Axium Process LTD	Strong evidence	Hendy, United KingdomHQ checked Sep 20, 2026	51-200	36 contacts →
	Strong evidence “Axium Process is a ‘one stop’ engineering house providing customised solutions to meet your individual requirements be it for a membrane filtration system to treat your effluent…” Source: RevenueBase Database · checked Sep 20, 2026
10	John Morfield	Partial evidence	Thornaby, United KingdomHQ checked Sep 20, 2026	11-50	30 contacts →
	Partial evidence “The UK's leading independent filtration supplier.” Source: RevenueBase Database · checked Sep 20, 2026
11	Bollfilter UK	Partial evidence	Tolleshunt D'arcy, United KingdomHQ checked Sep 20, 2026	501-1,000	29 contacts →
	Partial evidence “BOLLFILTER is a brand of the renowned BOLL & KIRCH Filterbau GmbH in Germany, a world market leader in providing liquid and gas filtration equipment since 1950, with subsidiaries…” Source: RevenueBase Database · checked Sep 20, 2026
12	Dryden Aqua	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 20, 2026	11-50	28 contacts →
	Indirect evidence “We are a leading aquatic environmental water treatment company specializing in technology and product innovation.” Source: RevenueBase Database · checked Sep 20, 2026
13	Allied Filter Systems LTD	Indirect evidence	Irlam, United KingdomHQ checked Sep 20, 2026	51-200	23 contacts →
	Indirect evidence “Allied Filter Systems Ltd® is the UK’s leading manufacturer & supplier of high-performance liquid filter bags, filter cartridges and filter equipment for process industries.” Source: RevenueBase Database · checked Sep 20, 2026
14	Westbury Group	Indirect evidence	Sandringham Court, United KingdomHQ checked Sep 20, 2026	51-200	16 contacts →
	Indirect evidence “Established in 1969, Westbury has become the largest privately owned British air filter manufacturer, with it’s Head Office and Factory based in Burnley Lancashire and additional…” Source: RevenueBase Database · checked Sep 20, 2026
15	Headline Filters Limited	Partial evidence	Aylesford, United KingdomHQ checked Sep 20, 2026	11-50	16 contacts →
	Partial evidence “About Headline Filters Headline Filters is a UK-based manufacturer specialising in high-performance gas and instrument air filtration for critical applications.” Source: RevenueBase Database · checked Sep 20, 2026
16	Gfsa Limited	Partial evidence	Stourbridge, United KingdomHQ checked Sep 20, 2026	11-50	12 contacts →
	Partial evidence “History GFSA Ltd began trading as Goodtech Betex Filtration Ltd in 1997 and was part of the Goodtech Group of companies and in 1998 changed its name to Goodtech FSA Ltd.” Source: RevenueBase Database · checked Sep 20, 2026
17	Porvair PLC	Partial evidence	King's Lynn, United KingdomHQ checked Sep 20, 2026	1,001-5,000	11 contacts →
	Partial evidence “Porvair is a group of specialist filtration, laboratory and environmental technology companies.” Source: RevenueBase Database · checked Sep 20, 2026
18	Croft Filters	Indirect evidence	Warrington, United KingdomHQ checked Sep 20, 2026	11-50	11 contacts →
	Indirect evidence “Customised filter manufacturers for diverse industries.” Source: RevenueBase Database · checked Sep 20, 2026
19	M.C. AIR Filtration LTD	Partial evidence	Gillingham, United KingdomHQ checked Sep 20, 2026	51-200	10 contacts →
	Partial evidence “Camfil Ltd Gillingham Branch is one of the U.K.'s leading designers and manufacturers of air filters and associated air filtration systems for the Pharmaceutical, Nuclear…” Source: RevenueBase Database · checked Sep 20, 2026
20	Filtertechnik	Partial evidence	Nottingham, United KingdomHQ checked Sep 20, 2026	11-50	9 contacts →
	Partial evidence “Manufacturer of Portable Particle Counters, Filtration Polishing Systems & Distributor for Schroeder Industries.” Source: RevenueBase Database · checked Sep 20, 2026
21	Puretec Separations	Indirect evidence	Ledbury, United KingdomHQ checked Sep 20, 2026	11-50	9 contacts →
	Indirect evidence “PureTec Separations is a leader in technologies and customer experience within the water treatment and product processing industries.” Source: RevenueBase Database · checked Sep 20, 2026
22	Molymem LTD	Strong evidence	Manchester, United KingdomHQ checked Sep 20, 2026	1-10	9 contacts →
	Strong evidence “Molymem Ltd is a University of Manchester spin-out commercialising technology to improve existing filtration membranes for separation applications in a wide range of markets…” Source: RevenueBase Database · checked Sep 20, 2026
23	AB Components LTD	Partial evidence	Ilkeston, United KingdomHQ checked Sep 20, 2026	11-50	9 contacts →
	Partial evidence “AB Components Ltd is a filtration specialist supplied by world leading manufacturers.” Source: RevenueBase Database · checked Sep 20, 2026
24	Rosedale Products Europe Limited	Indirect evidence	Wakefield, United KingdomHQ checked Sep 20, 2026	1-10	8 contacts →
	Indirect evidence “Rosedale Products, Inc.” Source: RevenueBase Database · checked Sep 20, 2026
25	Classic Filters LTD	Indirect evidence	Rochester, United KingdomHQ checked Sep 20, 2026	11-50	8 contacts →
	Indirect evidence “From a filter element, to a filter housing, to a complete filter system for almost any function, we deliver some of the most robust, high-quality, coalescing and particulate…” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: membrane filtration companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names membrane filtration companies.
Partial evidence: Its own public description names part of membrane filtration companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name membrane filtration companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 124 membrane filtration companies based in the United Kingdom

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Membrane filtration companies based in the United Kingdom at a glance

As of Sep 20, 2026

48.3%Verified-email coverage

12.6Average contacts per company

1-10Median size (employees)

9.7%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 124 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among membrane filtration companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “membrane filtration companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names membrane filtration companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among membrane filtration companies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 755 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names membrane filtration companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many membrane filtration companies are there based in the United Kingdom?

RevenueBase identified 124 membrane filtration companies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Porvair Filtration Group, headquartered in Fareham, tops this list with the largest team on record.

Which city has the most membrane filtration companies?

London leads with 12 headquartered companies, followed by Kings Lynn (3) and Manchester (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 755 verified decision-maker contacts tracked across these 124 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.