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.
The inlet valve seat, code 50501, is a critical combustion chamber component in the MAN L21/31 engine, providing a precise sealing surface for the inlet valve. Designed to withstand repeated thermal cycling and mechanical loading, the valve seat ensures reliable air admission into the cylinder while maintaining optimal compression integrity. Manufactured from wear- and heat-resistant materials, it minimizes erosion and deformation, contributing to stable engine performance, efficient combustion, and extended service intervals in demanding marine and power generation applications.
The counter ring K 73026 is a precision-machined sealing and wear component used in the cooling water pump of the Sulzer ZV40/48 engine. Positioned opposite the rotating sealing elements, it provides a stable, wear-resistant contact surface that ensures reliable sealing and controlled friction during pump operation. Engineered to withstand continuous exposure to water, pressure fluctuations, and thermal cycling, this counter ring helps prevent leakage, protects adjacent components, and contributes to the long-term efficiency, reliability, and durability of the cooling water pump system.
The shaft K 73023 is a critical drive component of the cooling water pump in the ZV40/48 engine, responsible for transmitting rotational power from the drive mechanism to the pump’s internal elements. Designed to operate reliably under constant load, vibration, and thermal influence, this shaft ensures precise alignment and efficient torque transfer throughout operation. Manufactured from high-strength, corrosion-resistant material, K 73023 minimizes wear on bearings and seals, supports stable pump performance, and plays a key role in maintaining effective engine cooling in demanding marine and industrial environments.
The bush K 73012 is a precision bearing sleeve designed for installation in bearing housing K 73011 within the Sulzer/Adriadiesel/Jugoturbina/Zgoda ZV40/48 engine’s cooling water pump assembly. Its primary function is to provide a low-friction, wear-resistant support surface for the rotating shaft, ensuring correct alignment and smooth operation under continuous load. Manufactured from materials optimized for lubrication retention and resistance to corrosion and mechanical stress, this bush reduces shaft wear, dampens vibration, and significantly extends the service life of the bearing system, contributing to reliable long-term pump performance.
The hand tools set, code P52004-02, includes high-quality manual tools designed for everyday mechanical work on the MAN L21/31 engine. Comprising items such as spanners, wrenches, screwdrivers, and auxiliary tools, this set supports safe and precise handling of fasteners and components during maintenance and repair. Built for durability and ergonomic use in demanding environments, these hand tools are indispensable for efficient onboard servicing and workshop operations, ensuring consistent workmanship and reduced wear on engine parts.