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DMR Seals FB03 profile is a tight tolerance ‘L’ shaped piston guide ring / wear ring which can be manufactured from several of our high-performance thermoplastic materials to provide precise clearance control of mating metallic hardware members in fluid power or pneumatic systems.

The tight tolerance control on the FB03 profile ensures excellent bearing contact which helps minimise and control misalignment while the piston or rod is under static or dynamic load which helps significantly increase seal life when compared to high volume moulded rings. This profile can be provided either solid or split for ease of installation and is commonly utilised in tandem alongside double acting (bi-directional) piston seals working on a split / two-piece piston as per our piston seal profile KB17 and in single acting (uni-directional) applications such as our profile XB51 where it can be used as a combined back-up ring and guide ring.

FB03 can be supplied with spiral grooves on the main contact surface to prevent entrapped pressure between the seal and the guide ring itself. The addition of these grooves can also help eliminate jet -erosion, which is where the high-pressure fluid of the hydraulic system is forced through the localised split in the ring and damages the seal.

Please contact our technical department for further information on the correct material choice for your application.