Delivering Fluid Sealing Solutions Since 1972

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Seals For The World

ASCENSION island

The Sun Never Sets On A Barnwell Seal In August the M Barnwell Services Export department supplied a range of specialist O Rings to their 69th and most remote location – Ascension Island. Ascension Island is an isolated volcanic island, south of the Equator in the South Atlantic Ocean. It is about 1,000 miles from the coast of Africa and […]

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Wet Chemical Process

Semiconductor Manufacturing – Wet Chemical Process Electro or Electroless Chemical Deposition Despite the fact that this is a smaller division of the semiconductor chip manufacturing industry, it still plays a crucial role. Wet chemical processes are used in etching, cleaning, and other stages in chip manufacturing. Wafers can be cleaned and rinsed after the first wafer preparation. In this stage, […]

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Trade Names for Seal Materials

Trade Names for Materials

Trade Names for Materials Using trade names for seal materials is very popular in our division in order to define common materials. The chemical names can be quite difficult to remember and quote. Manufacturers and trade names occur for the chemical names containing the most typical compounds. The material’s chemical name is permanently retained (example: Tetrafluoroethylene-Propylene Copolymer). It is not, […]

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Precision Sealing Solutions

Precision Sealing Products for the Medical Industry M Barnwell Services is one of the UK’s largest stockist, manufacturer and distributors of Precision Sealing products for the Medical industry. For over 45 years our customers benefit from technical expertise and industry knowledge. Together with our manufacturing partners, we continue to develop industry-leading performance on all our products and deliver within short […]

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Oil Seal Failure Checklist

A guide to why your Oil Seal / Rotary Shaft Seal may fail The below Oil Seal Failure Checklist provides information about seals leakage to those involved in the application and maintenance of Rotary Shaft Seals. Identifying and correcting the cause of leakage will assist the trouble-free, efficient and extended operation. There are two parts an Oil Seal / Rotary […]

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Semiconductor Manufacturing Process

Semiconductor Manufacturing Process

Semiconductor Manufacturing Process Overview: Plasma, Thermal & Wet Processes Synergistic process technologies that have some of the most demanding environments for elastomer materials are etch, ash/strip, deposition, thermal and plasma processing. They are frequently confronted throughout the manufacture of: MEMS Flat Panel Displays (FPD) LED/OLED HBLED Solar Cells (Concentrator, Multi-Crystalline, Crystalline) Logic and memory Photovoltaic cells Optoelectronics Power devices Semiconductor […]

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Plasma Process

Semiconductor Manufacturing – Plasma Process The plasma process is one of the most hostile for elastomers, especially those vulnerable to chemicals and/or close to the substrate or the wafer. The most hostile plasma processes for elastomers include oxygen resist strip and radical based plasmas (such as remote NF3) and chamber cleans using remote plasma sources (RPS). Every seal, especially one […]

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What is Rubber Shrinkage?

What you need to know about Rubber Shrinkage The calculation of O Ring squeeze is one of the main elements to take into consideration when designing a seal for a particular application. This is because the amount of O Ring by the media can have an impact on the design, material selection, and other important features. O Ring Squeeze – […]

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What is the difference between Teflon and PTFE?

Teflon vs PTFE

Teflon™ vs PTFE The sealing industry is full of trade names, technical phrases, and acronyms, which makes it hard to know what is what. In this learning journal, we will explain what Teflon™ and PTFE are, and also the differences. PTFE – what is it? PTFE is a carbon and fluorine synthetic polymer – Polytetrafluoroethylene. It is obtained from Tetrafluoroethylene […]

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Profile Seal DIN3869 Advantages & Features

Everything you need to know about Profile Seals DIN3869 Axially static soft seals combined with threaded elements are generally called Profile Seals (DIN3869 Seals or Fluid Connector Seals). They are often used as an alternative to an O Ring/Back-up Ring combination. How do they provide effective sealing? Profile Ring’s purpose is to stop the medium from leakage, at the same […]

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