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Our extensive portfolio of high performance, high pressure O‑rings includes metric and inch sizes to a range of international, national and industry standards.
James Walker specialises in high-performance O-rings, manufactured in a variety of general and high performance elastomers to suit the vast majority of industrial and specialised applications.
The seemingly humble O-ring, or toroidal seal, is an exceptionally versatile sealing device. Applications ranging from garden hose couplings to critical aerospace or oil and gas duties make it the world's most popular volume produced seal.
We have been making top-quality O-rings since this sealing method was introduced in the 1930s. Today we stock many thousands of types and sizes in our most popular materials - including high pressure O-rings and specialised grades for applications such as oilfield, bioprocessing and nuclear - ready for same-day despatch.
If the O-rings you want are not available off-the-shelf, with our 'lean' manufacturing plant and flexible production schedules, we can often precision manufacture them within hours if necessary, to meet the most urgent of requests.
At James Walker, we deliver custom sealing solutions and bespoke O-rings to meet the needs of a broad range of specialised applications.
We create bespoke seals that adhere to an extensive range of international, national and industry standards, with a focus on high-performance and high-pressure environments. We make use of a combination of general and high-performance elastomers, to create custom O-ring and sealing solutions specifically engineered for the most demanding applications.
Our advanced manufacturing capabilities and flexible production schedule allow us to offer precision-manufactured, bespoke O-rings.
Working under tight time constraints? Let us know your deadline, and we will work to turn around your bespoke order to meet your schedule, potentially within hours.
Back-up rings are installed to prevent the extrusion of the ‘O’ ring. They are manufactured from Fluolion® PTFE (virgin or filled), and PEEK.
They are recommended for applications where:
Please consult our Technical Support Team if system pressure exceeds 42MPa (6092psi).
In instances where the application is double-acting, two back-up rings — one either side of the ‘O’ ring in its housing — are needed.
Our back-up rings are usually supplied as a spiral of two turns for virgin PTFE. This enables the back-up ring to be opened with ease for fitting over a shaft and ensures the ‘O’ ring is supported around its entire diameter.
Single-turn back-up rings can also be supplied, and these are usually endless to ensure good support in PEEK. However, they can be scarf split if required, although we do not recommend this because extrusion can occur at the split.
Back-up rings less than 3mm ID are available only as a single turn — 3mm ID is the smallest size suitable for machining as a two-turn spiral.
Want to discuss your project, engineering or materials challenge expert to expert? Simply provide us with your contact details and a little information about the application you are working on, and one of our experts will contact you as soon as possible.
