Delivering Fluid Sealing Solutions Since 1972

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ChemUK 2026

M Barnwell Services is pleased to announce it’s participation at ChemUK 2026, the premier exhibition and meeting place for the Chemical, Laboratory and Process industries. The event takes place on 20th and 21st May 2026 at NEC, Birmingham. This year, you will find us in the Process and Chemicals Engineering Zone at stand K64. Our team of specialists will be […]

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Easter Opening Times

Happy Easter! We would like to wish you and your loved ones a Happy Easter from everyone at Barnwell. Please see below, our Easter opening times: Good Friday – Closed Saturday 4th April – Closed Easter Sunday – Closed Easter Monday – Closed Usual opening hours from Tuesday 7th April.  

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Aerospace Material Specification (AMS)

AMS Specification Seals for the Aerospace & Defence Industry Aerospace Material Specification (AMS) Seals are the Gold standard for compliance and material integrity. Managed by SAE International, these materials meet global benchmarks to withstand extreme thermal, chemical, and atmospheric aviation pressures. More than just a ‘part number,’ an AMS-certified seal provides: Compliance & Traceability Environmental Resilience Mission-Critical Safety Compliance & […]

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2024 Easter Competition Winners

Easter at M Barnwell Service

Winners of the “How many Circlips are in the jar?” Easter Competition 2024 Firstly, we would like to say BIG THANK YOU to everyone who participated in our free-to-enter Easter competition! Our very special CONGRATULATIONS go to 3 lucky winners: Geraint from Caerphilly – Winner of the Cadbury Ultimate Chocolate Basket Ashley from Stirlingshire– Winner of the Cadbury Ultimate Chocolate […]

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Easter Competition 2024

How many Circlips are in the Jar?

“How many Circlips are in the jar?” Competition 2024 Take part in M Barnwell Services’ Easter Competition 2024 “How many Circlips are in the jar?” and win one of three fantastic Cadbury’s Chocolate prizes – CADBURY ULTIMATE CHOCOLATE BASKET, CADBURY CHOCOLATE SHARING HAMPER, or CADBURY CLASSIC CHOCOLATE GIFT. To be in with the chance to win one of the 3 […]

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What is a Nominal Size?

Nominal Size O Rings

Understanding Nominal Seals and Gaskets In manufacturing, a nominal size is primarily for identification rather than reflecting exact product dimensions, often corresponding to standardised measurements and tolerances within the product’s domain. These nominal sizes can either be widely standardised across an industry or unique to a particular manufacturer. To apply nominal sizes effectively, one must understand the sizing systems in […]

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Vintage Seals for a BPH 106H Swift bus

M Barnwell Services supplies vintage seals for the restoration of a BPH 106H Swift Bus. M Barnwell Services, the UK’s largest independent manufacturer, stockist, and distributor of O Rings and Back-Up Rings, are proud to offer vintage Pneumatic seals for the restoration of a BPH 106H Swift Bus. With our ability to provide bespoke Pneumatic Seals, M Barnwell’s sales team was […]

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How to use an O Ring Tester

What is the purpose of an O Ring Tester? The O Ring Tester is a device used to approximately advise the shore hardness of  Viton™ (or FKM/FPM), Kalrez® or other Perfluoroelastomer (FFKM), Nitrile (NBR) or Ethylene Propylene (EPDM). It indicates the material composition of 100, 200, 300 and 400 series O-rings of 60 to 80 Durometer. Furthermore, O Ring Testers also: […]

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M Barnwell Services World Cup Chart

World Cup Wall Chart

Celebrate the World Cup with M Barnwell Services! At M Barnwell Services we have created a World Cup Wall Chart so you can follow the tournament along with us! Download your free Wall Chart here.

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Oil & Gas Industry Acronyms

Oil & Gas Acronym

The Complete Guide To Oil & Gas Industry Acronyms Learning a new language is not easy, and there is unfortunately no quick fix for learning Oil and Gas acronyms. On some occasions, use of these abbreviations often form part of a wider discussions when finding fluid sealing solutions. Improper use of acronyms can be confusing at best and embarrassing at […]

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