For this specific 52*72*8 model, we utilize high-performance NBR (Nitrile) for standard hydraulic oil applications, offering excellent oil resistance and elasticity. NBR is the industrial standard for temperatures ranging from -30°C to +100°C. For high-performance environments involving synthetic fluids or temperatures exceeding +180°C, we provide an FKM (Viton) variant. FKM is superior in resisting chemical degradation and maintaining its sealing profile under extreme thermal stress, preventing the seal from hardening and leaking in heavy-duty cycles.

Longevity in hydraulic systems depends heavily on correct installation. The 52 * 72 * 8 mm seal must be pressed into the housing bore using a flat-face tool to avoid distorting the metal casing. We emphasize the “Low Friction” life of CFKS seals; however, the shaft must be polished to a surface finish of Ra 0.2 to 0.8 µm. During maintenance, always inspect the shaft for “grooving.” If a wear track is present, we recommend installing a wear sleeve to ensure the new seal lip seats on a perfectly smooth surface, preventing immediate failure.