Selecting the correct elastomer matrix directly dictates sealing longevity in harsh operating environments. Standard NBR compounds deliver exceptional physical resistance to abrasion, mineral oils, and grease, operating reliably across temperature ranges from -30°C to 100°C. For heavy-duty applications exposed to extreme thermal cycling, aggressive synthetic fluids, or high linear shaft speeds, specialized FKM  formulations provide enhanced chemical stability and withstand continuous temperatures up to 200°C. Both elastomer options are compounding-optimized to resist permanent compression set, preventing leakage even under sustained cyclic pressure and dynamic runout.

The unitized Cassette Combi architecture greatly simplifies field replacement and scheduled maintenance routines. Because the elastomeric seal and wear sleeve function as a pre-assembled single unit, technicians can press fit the seal directly onto worn shaft surfaces without requiring secondary sleeving or shaft refinishing. During installation, press tool force must be applied evenly across the outer steel cage to align the seal flush with the housing bore. This eliminates shaft grooving, reduces mechanical downtime, and ensures optimal radial pre-load on the sealing lips right out of the box.