Lipped seal DANAROTO®

circularpolymerfor rotating shafts

The Repack-S DANA range offers a wide range of rotary sealing options. Of particular note is the DANAROTO® seal. It comprises an inner polymer pad with multiple radial sealing grooves in contact with the rotating shaft, and an elastomer O-ring energiser installed on the outer diameter in the seal groove Designed specifically for rotary movements, the pad has a castellated profile. Its castellated design serves two functions: it provides multiple sealing barriers preventing ingress of abrasive particles from reaching the shafts bearing assemblies. Additionally the castellated designs recesses can be used to hold lubricating grease, if required. In addition, the castellated pad reduces the surface area in contact with the shaft to ensure lower contact friction. It also allows increased contact pressure, and therefore achieves better sealing. To fully optimise sealing efficiency, especially in high pressure applications, the surface profile of the interface between the polymer pad and rubber energiser is recessed to optimise surface contact.