The round seal ring, code 06.56933-2418.0, is a critical sealing element in the MAN L21/31 engine, used to prevent leakage at static or dynamic joints within oil, fuel, or cooling circuits. Manufactured from durable, heat- and pressure-resistant materials, it ensures reliable sealing even under demanding operating conditions. By maintaining tight connections and preventing contamination or fluid loss, this seal ring contributes directly to engine cleanliness, efficiency, and long-term reliability.