The performance envelope of the SPGW glide ring is dictated by its specialized material composite, designed for continuous operation in aggressive construction and mining environments.

• Dynamic Glide Ring (Bronze-Filled PTFE): Pure PTFE is too soft for heavy hydraulics. We compound our glide rings with high-density Bronze powder. This provides exceptional compressive strength, massive wear resistance, and high thermal conductivity to pull friction-generated heat away from the seal face.

• Anti-Extrusion Rings (POM / Nylon): Polyoxymethylene (POM) is a highly rigid engineering thermoplastic. It easily handles the immense shear forces generated by a heavy-duty excavator piston pushing against high-pressure hydraulic fluid.

• Static Energizer (High-Density NBR): The square-profiled NBR core provides permanent “memory” and radial force, ensuring the seal maintains boundary contact even at zero system pressure.

To ensure a factory-perfect installation, technicians must first heat the PTFE ring in clean hydraulic oil or water to approximately 80°C – 100°C to soften the material. It should then be carefully expanded over the piston using an installation cone. Once seated over the NBR energizer and flanked by the POM back-ups, the stretched PTFE will be loose. You must use a mechanical sizing sleeve (calibration tool) to compress the PTFE back to its precise operating diameter before inserting the piston assembly into the cylinder barrel. Failure to properly resize the ring will cause the PTFE to catch and shear on the cylinder chamfer during insertion.