O-rings are the most common sealing element – a simple, cost-effective solution. An O-ring is a two-sided seal, which seals a fluid or gas from a metal surface. The seal acts as an extremely viscous liquid, which shifts compression to the points at which the seal is in contact with the groove and cylinder. Because they take up less space and provide two-sided sealing, O-rings make technical design work easier compared to other sealing elements.

O-rings are used in the vast majority of sectors and industries. O-rings are used in almost every industry and type of machinery but espe-cially in static sealing applications, such as flanges and cover seals. Under optimal operating conditions, O-rings can be used as dynamic seals, e.g. in cylinders. However, O-rings are not recommended for use in rotary applications.