The round seal ring with code 06.56936-1507.A is a critical sealing element in the MAN L21/31 engine, designed to prevent leakage of oil, fuel, or cooling media between connected components. Manufactured from high-quality, resilient materials, it provides reliable sealing under fluctuating pressures, temperatures, and vibration. Its ability to accommodate minor movements and thermal expansion helps maintain system integrity, reduce fluid losses, and support stable long-term engine operation in demanding marine and power generation environments.