The exhaust valves, code 50502, play a vital role in controlling the discharge of exhaust gases from the MAN L21/31 engine’s combustion chamber. Operating under extreme temperatures and corrosive conditions, these valves are engineered from high-temperature alloys to ensure durability, tight sealing, and resistance to thermal fatigue. Proper exhaust valve function is essential for maintaining engine efficiency, protecting downstream components such as turbochargers, and ensuring compliance with emission and reliability requirements in continuous-duty operation.