M&P makes custom and standard back-up rings from PEEK™ plastic.
PEEK™ back-up rings are designed to prevent extrusion in elastomer O-ring sealing systems.
Elastomer O-rings serve as effective seals for dynamic and static applications in hydraulic and pneumatic equipment systems. A drawback of elastomer O-rings is their tendency to extrude into the clearance of mating surfaces when subjected to increasing pressures and temperatures. Elevated temperatures impose a severe burden on the physical and mechanical properties of elastomer O-rings, which further increases their tendency to extrude. The combination of high pressures and high temperatures is a common occurrence in present day fluid systems. This establishes the need of the back-up ring in preventing O-Ring extrusion.
M&P makes various types of PEEK™ back-up ring designs.
PEEK™ is a registered trademark of VICTREX.