SKF Blohm + Voss Industries introduces its SC3 ring – the new-generation lip-sealing ring for SIMPLEX-COMPACT stern tube seals. The new sealing ring meets the increasing demands of the marine industry as well as the requirements of the VGP 2013, thanks to new design and a new elastomer mix.
The new shape of the ring helps it function reliably and remain stable under increasingly extreme conditions like higher variations in pressure. The SC3 ring is better able to handle such differences in pressure. It has a shorter lip, which reduces the pressure-loaded area. Thanks to a now self-aligning annular spring, the ring is better able to adjust to the actual pressure. Both of these changes mean that the friction acting on the ring – and the associated heat generation – are reduced, without limiting the ring’s efficiency.
Further new features include the lubrication pockets that have been embedded into the ring. These feed a larger volume of oil to the sealing gap, which leads to a cooling effect, improved tribological performance in the sealing gap and a slow-down in the aging process.