Sealing elements require a standard elastic deformation (compression) between the sealing surfaces in order to function properly. Based on the direction in which this pressure-induced compression takes place, two types of installation of sealing elements can be distinguished.
The radial seal is pressed in a radial direction. Axial seals, on the other hand, are characterized by compression in the installation direction. Radial seals can be divided into two categories.
- Piston seal: installation space in the inner part
- Rod seal: installation space in the outer part
Piston seals are also referred to as externally sealing, while rod seals are referred to as internally sealing. Radial seals are used in static and dynamic applications.