The O-ring coded K 11126 is a compact yet vital sealing component used with ring K 11116 in the Sulzer ZV40/48 engine. It provides a flexible and leak-proof interface in assemblies exposed to high pressure or thermal cycling. Engineered from resilient elastomeric material, the O-ring maintains its shape and function over extended operational periods, resisting wear, compression, and chemical degradation. Its role is fundamental to preserving internal sealing performance, particularly in fuel, oil, or air systems where tight containment is critical.