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Designed for use on one-piece solid pistons the KB09C is a more standard 5-piece piston seal profile.

It is a double acting/bi-directional piston seal comprising of a central elastomeric sealing element, precision machined thermoplastic guide rings and back-up rings which are split to allow assembly onto the solid piston.

The central sealing element provides initial radial compression upon installation to provide low pressure sealing, when subjected to system pressure the seal energises to provide further compressive force and leak tightness. While offering extrusion resistance the guide rings also support and centralise the piston head while reciprocating in the hydraulic cylinder and help prevent metal to metal contact under side load conditions