Piston seals incorporating anti-extrusion rings
These SKF piston seals incorporate patented locking anti-extrusion rings made of polyamide (PA). They are split for easy installation. Their snap-in design makes it easy to identify the correct installation direction (fig. 1), holds them in place when installed and prevents damage during assembly.
Piston seals incorporating anti-extrusion rings have an improved high pressure performance and minimize the risk of gap extrusion at abrupt pressure peaks (→ Gap extrusion).