Delivering Fluid Sealing Solutions Since 1972

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Christmas Competition 2019

”WIN A Hamper” Christmas Competition 2019 M Barnwell Services are giving you the chance to win a Fortnum & Mason Classic Christmas Hamper. From Monday 11th November 2019 there will be SIX jigsaw puzzle pieces hidden within the pages of the M Barnwell Services’ website. To win the prize hamper, all you have to do is find all six pieces […]

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Lucky competition winners get VIP treatment at The British Touring Car Championships

Bondloc BTCC

After winning a competition three lucky Barnwell customers got to enjoy a VIP experience at the British Touring Car Championships. The winners were: 1st Prize: Keith D from the West Midlands (Included x2 VIP Hospitality, Grid walk, Access to garage, Team track top) 2nd Prize: Marc B from Norfolk (Included x2 Grid walk, Team polo shirt) 3rd Prize: Jamie H […]

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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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Semiconductor Material Grades

Semiconductor Material Grades

Material Grades used in Semiconductor Manufacturing What are the Semiconductor Material Grades? Performance requirements vary based on elastomer location in the process. The advantages of using our elastomer materials include decreased cost of ownership, extended tool Preventative Maintenance (PM) cycles, lower process defects, decreased particle origination and maximised device performance. Below is the table with our recommended material grades (Other […]

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Guide to Seal Installation

Expert advice on seal installation The first step to having an efficient and lasting part is getting a precise, custom manufactured seal for your application. Anyhow, errors happen during installation of the seal, which leads to failure, no matter what the quality of the seal was in the first place. Make sure the seal and assembly equipment are clean Cleanliness […]

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International O Ring Sizes

O Ring Sizes An O Ring (also known as Toroidal Seal) is the most popular seal used globally nowadays. It is utilised to mould a physical barrier to stop the blending of liquid fluids or gasses. The O Ring’s straightforward toroidal configuration has proven to provide high sealing effectiveness over a broad scope of installations. We distribute, stock and manufacture […]

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Conversion Formulas in Sealing

Below Formulas can be used to convert your required metrics. Cross Section CS = (OD – ID) ÷ 2 Inner Diameter ID = OD – (2 x CS) Outer Diameter OD = ID + (2 x CS) Inner Diameter ID = (CL ÷ π) – CS °F = (1.8 x °C) + 32 °C = (°F – 32) ÷ 1.8 […]

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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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Types of Silicone

Types of Silicone: MQ, VMQ, PMQ & FVMQ – what does it all mean? Silicone is used in a wide selection of industries, including Food & Drink, Pharmaceutical to Aerospace. It presents low toxicity, excellent flexibility, resistance to oxygen, UV, ozone and microbial growth. Silicone as a sealing material has one of the greatest scopes of working temperatures. A Standard […]

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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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