The top of the line Simmerring Radiamatic R 37 has lasting radial contact pressure and is highly wear resistant and has design measures. To continue, the product is used, in case of adequate lubrication by the medium to be sealed, preferably where shafts pass through walls in mills and large gearboxes in heavy machinery manufacturing. Over pressure requires the usage of endless seals. Back-up ring drawings and installation instructions for open seals are available too.