We’ll develop exactly the right blend of materials for your performance requirements
At DP Seals we pride ourselves on being able to provide specialist advice in selecting and developing exactly the right blend of materials to meet a vast range of performance requirements. We specialise in providing customised solutions to customers seeking extreme performance without an extreme price tag. As a result we have mastered production parameters surrounding exciting new materials, putting us at the forefront of custom rubber moulding. We also maintain a large quantity and variety of quality raw materials in stock, enabling us to offer fast turnaround and provide for tight deadlines.
Giving you access to specialist rubber materials advice the way you want it
Given the plethora of rubber seal, gasket and moulding companies around, it’s easy to see why engineers leave selection until late in the design cycle. All too often, this forces engineers to choose an out-of-the-catalogue product that compromises performance, or into eleventh-hour development of a specialised moulding, delaying market entry. With the increasing variety of rubber compounds available, and the ability to tailor them to specific requirements, engineers are continually finding new and innovative uses for rubber mouldings. It’s never too early to start considering your material selection.
Here are all the ways we can support you:
- Use our chemical compatibility database to check over 1,600 chemicals against all the major polymers.
- Contact our materials technologists for help and advice. Phone on +44 (1202) 674671
- Download our guide to custom rubber
- Watch our video(s)
Rubber materials testing, analysis and development to ensure you get reliable and consistent performance
Materials testing obviously has a fundamental part to play in ensuring we achieve the standards that have become synonymous with our name. To this end, we’re now forming a working partnership with Artis – the Melksham based company that’s widely acknowledged as a leader in its field.
At its superbly equipped laboratories, Artis is able to undertake a comprehensive range of testing, analysis and development to provide critically accurate data relating to a huge variety of rubbers and polymers. Their dedicated team of expert scientists and technicians can investigate virtually any factor that might affect the seals or mouldings we produce – from temperature extremes to chemical contamination, UV ageing to pressure fluctuations and everything else besides. And just to underline their commitment to quality, they’ve recently installed six new autoclaves to carry out the sour gas testing that’s essential for compliance with stringent standards such as NORSOK M-710.
Frequently used and specialised materials
DP Seals has mastered perfluoroelastomers/FFKM. This fully-fluorinated polymer provides an exceptional combination of temperature and chemical performance making it the material of choice for fuel and lubrication seals as well as connectors operating under the harshest conditions. However, recent advances in compounding have identified some lower cost alternatives:
Below FFKM is FKM, offering high temperature performance, exceptional resistance to chemicals and mineral oils, and good resistance to ozone and sunlight. However, its long-term problems with high pH chemicals (bases) are solved with Viton Extreme compounds such as ETP 600S. This new fluoroelastomer offers improved tensile strength, superior compression set resistance and lower volume swell for longer seal life and wear resistance, making it ideal for use in fuel and lubrication seals.
Optimised HNBR compounds are now available that offer a performance envelope similar to FFKM at a significantly lower cost. They maintain the high temperature performance while extending low temperature applications to -50°C, expanding opportunities in Arctic-like weather conditions. Additionally, HNBR’s excellent resistance to abrasion is extended, offering engineers a choice between optimised HNBR and perfluoroelastomers.
Cutting-edge polymer choices
For companies at the cutting edge of their technologies, DP Seals continuously investigates new rubber polymers through its on-going R&D programme to better understand not only the material’s design performance but also its moulding characteristics.
Hydrogenated Carboxylated Nitrile
HNBR’s advantages in oil and gas are well understood; carboxylation further improves abrasion resistance making it one tough material.
Teflon-coated rubber has been around for some time. However, using nano-particle Teflon as a fluoroelastomer filler shows immense promise, reducing friction with no flexibility and flaking side-effects.
Fluoroelastomers perform well at high temperatures but poorly at low temperatures; silicone fluoroelastomer works down to -50°C without top-end compromise with upgraded chemical resistance and much improved metal bonding.
HPLT: high pressure, low temperature FKM
As oil and gas exploration moves into Arctic and Antarctic regions, so the demand for hard wearing, high pressure, low temperature polymers grows. DP Seals has teamed up with Solvay Specialty Polymers (world #2 in fluorochemicals) to pioneer the use of new technology polymers offering a -40°C glass temperature and improved chemical resistance profile. We are already making aerospace and subsea mouldings in this material for clients.