The round seal ring, code 100100, is a precision-engineered circular sealing element developed to ensure leak-tight connections within the MAN L21/31 engine. Its symmetrical design provides uniform contact pressure around the entire sealing surface, helping to maintain reliable sealing performance under varying temperatures and pressure conditions. Commonly used in fluid and lubrication systems, the round seal ring prevents the loss of operating media and protects internal components from contamination. Manufactured from high-quality materials selected for their resistance to wear, heat, and chemical exposure, this component plays an important role in maintaining operational stability, system reliability, and long-term engine durability.