Th e extrusion behavior of new sealing materials is determined, for example, by using rectangular piston seals or standard rings.
When using this method extrusion occurs as a result of the specifi ed loadings and the radial gap behind the seal. It can be measured as a permanent plastic deformation resulting from the intrusion of the material into the radial gap under the applied
Test Conditions Piston seals Ø 100 mm
(300 bar, 72 h, 80 °C, radial gap 0.5 mm)