The sealing rings are made of an elastomer element and a metal insert.
An helicoidal spring is situated on the oil shelter lip to favour a greater seal.
The sealing rings can be made of any type of synthetic compound, they can have different profiles according to the different seal requirements. They are used to seal the machines elements in a large variety of industrial applications as in the aeolic, naval, rolling, construction, agriculture fields, where the working conditions require very long maintenance intervals adaptable to different characteristic and extreme working conditions such as in presence of high temperature, acides, oils, stone fragments, seawater or high speeds. Its main task is prevent leakage and reduce friction and heating in the vicinity of crankshaft.