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DMR Seals FB07 profile is a tight tolerance ‘U’ shaped piston guide ring / wear ring which is produced with additional retaining lugs which help prevent axial movement while the piston is reciprocating under pressure. These retaining lugs can also help retain the ring when it may be required to pass over an inlet port.

Profile FB07 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 this profile ensures excellent bearing contact which helps minimise and control misalignment while the piston is under static or dynamic load which helps to significantly increase seal life when compared to high volume moulded rings.

This profile is provided split for ease of installation and is commonly utilised in tandem alongside our double acting (bi-directional) piston seal KB08E for heavy duty long stroke applications.

Profile FB07 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.