The disc, code 06.15010-2211.0, is a multifunctional precision component used in various assemblies of the MAN L21/31 engine where accurate force distribution, spacing, or flow control is required. Produced to strict flatness and dimensional tolerances, it ensures uniform load transfer and reliable positioning of adjacent parts under dynamic operating conditions. Its robust material properties provide excellent resistance to mechanical stress, temperature variation, and wear, making it suitable for long-term service in demanding environments. Whether acting as a thrust element, spacer, or functional interface, this disc contributes to stable operation, reduced vibration, and extended service life of the engine’s critical systems.

The compression fitting, code 06.71010-0308.0, is a precision-engineered connection element designed to ensure safe and leak-free joining of pipelines within the MAN L21/31 engine systems. By creating a strong mechanical grip and a reliable metal-to-metal seal, it enables secure transmission of fuel, lubricating oil, air, or cooling media even under high pressure, temperature fluctuations, and continuous vibration. Its carefully machined sealing surfaces and high-strength material guarantee long service life, easy assembly, and repeatable performance during maintenance operations. As a key component in auxiliary and control circuits, the compression fitting contributes to operational safety, system efficiency, and the overall reliability of marine and power-generation installations.

The bolt H 45376 is a high-integrity fastening element used to secure heavily loaded structural and mechanical joints within the Sulzer ASL25 engine. Engineered to withstand cyclic forces, thermal expansion, and persistent vibration, it provides consistent clamping force and accurate load distribution across connected components. Its precision threading and controlled material properties ensure reliable preload retention, resistance to fatigue, and long service life. This bolt is fundamental for maintaining assembly integrity and supporting safe, uninterrupted engine operation in demanding marine and industrial environments.

The guide pipe, code 11.01132-0022-1.C, is a precisely engineered component designed to direct and stabilize the flow of fluids or the movement of functional elements within the MAN L21/31 engine. Its accurate geometry ensures proper alignment, controlled flow characteristics, and reduced mechanical stress on connected parts. Manufactured from high-quality materials with excellent resistance to temperature and corrosion, it guarantees dimensional stability and long operational life. By maintaining defined guidance and preventing misalignment or turbulence, the guide pipe supports efficient system performance, minimizes wear, and contributes to the overall reliability and operational safety of the engine.

The seal ring, code 06.56190-0716-1.0, is a vital element for maintaining tight and reliable sealing within the MAN L21/31 engine, ensuring that lubricating oil, cooling water, or air systems remain completely leak-free under varying pressure and temperature conditions. Manufactured from carefully selected materials with high resistance to wear, thermal aging, and chemical exposure, it provides long-term elasticity and consistent sealing performance. By preventing fluid loss and the ingress of contaminants, the seal ring protects adjacent components, preserves system efficiency, and supports stable engine operation. Its precision dimensions enable quick installation and dependable service life, making it an essential part for safe and economical engine performance in marine and power-generation applications.

The nut H 27222 is a high-strength fastening component developed for bolted joints in the Sulzer ASL25 engine that are exposed to dynamic loading and temperature variation. Engineered to maintain consistent preload and resist loosening under vibration, this nut ensures secure retention of critical assemblies and stable mechanical alignment. With precision-formed threads and controlled material properties, it provides dependable clamping force, extended service life, and a key contribution to the overall structural reliability of the engine.

The washer, code 06.16169-0004-1.A, serves as a fundamental load-distribution element within the fastening systems of the MAN L21/31 engine. Positioned between the bolt head or nut and the contact surface, it ensures even pressure distribution, protects machined surfaces from damage, and contributes to accurate torque transmission during assembly. Manufactured to strict dimensional and material standards, it provides excellent resistance to deformation and wear, even under high tightening forces and cyclic loading. By improving joint stability and extending the service life of connected components, this washer plays an important role in the overall durability and efficiency of the engine.

The cover, code 11.01213-0058.A, is a precisely machined protective component that plays a key role in sealing and safeguarding functional zones of the MAN L21/31 engine. Designed for exact fit and structural rigidity, it prevents the ingress of contaminants while ensuring that lubricants and internal media remain securely contained within the system. In addition to its sealing function, the cover contributes to improved thermal balance and reduced noise emission by stabilizing the enclosed space. Manufactured from high-quality materials and treated for corrosion resistance, it guarantees long service life and reliable performance under demanding marine and power-generation operating conditions.

The seal H 16552 is a critical protective component designed to provide reliable sealing in selected interfaces of the Sulzer ASL25 engine where fluid retention and contamination control are essential. Engineered for resistance to oil, temperature fluctuations, and continuous mechanical stress, it maintains elasticity and sealing integrity throughout extended operating periods. By minimizing leakage and safeguarding adjacent assemblies from external impurities, the H 16552 seal contributes directly to reduced maintenance requirements, improved system cleanliness, and the long-term reliability of the engine’s auxiliary and main systems.

The assembly spray nozzles, code 11.01213-0063.0, play a crucial role in the precise distribution of lubricating or cooling media within the MAN L21/31 engine, ensuring optimal operating conditions for heavily loaded components. Designed for accurate flow characteristics and uniform atomization, these nozzles enable targeted delivery of oil to critical contact surfaces, reducing friction, controlling temperature, and minimizing wear. Their high-quality materials and finely machined internal geometry guarantee consistent performance, resistance to clogging, and long service life even in harsh operating environments. By maintaining efficient lubrication and thermal balance, the spray nozzle assembly directly supports engine efficiency, component longevity, and overall operational safety.

The retaining ring for boring, 108×4, code 06.29020-0215.0, is a precision-engineered fastening element that ensures the secure axial positioning of components within the MAN L21/31 engine assembly. Manufactured from high-strength spring steel and machined to exact dimensional tolerances, it provides reliable locking performance even under continuous vibration, thermal expansion, and dynamic load conditions. Its function is essential for maintaining the integrity of rotating and reciprocating assemblies, preventing unwanted movement and ensuring accurate alignment during long operating cycles. By combining durability with ease of installation and removal, this retaining ring supports efficient maintenance procedures and contributes to the long-term operational reliability of marine and power-generation engines.

The sealing ring H 16523 is a critical component used to achieve leak-free operation in key interfaces of the Sulzer ASL25 engine. Engineered for resistance to oil, temperature variation, and mechanical stress, it maintains elasticity and sealing effectiveness over extended service intervals. By ensuring a secure barrier against fluid loss and ingress of contaminants, this sealing ring protects adjacent components, reduces maintenance requirements, and contributes to the long-term reliability and efficiency of the engine’s fluid-handling systems.

The closing cover, code 11.01288-0075.B, plays a vital role in sealing and protecting internal spaces of the MAN L21/31 engine. Installed at designated access points or housing openings, it prevents the escape of lubricants and the entry of contaminants, while also contributing to noise reduction and thermal stability. Engineered for pressure resistance and precise fit, this component ensures safe containment of fluids and maintains a controlled internal environment, which is essential for long-term engine efficiency and reduced maintenance requirements.

The protecting cap, code 11.01251-0048.0, is a small but highly important component in the MAN L21/31 engine, designed to shield sensitive connection points and fasteners from contamination, moisture, and mechanical damage. By sealing exposed interfaces, it helps prevent corrosion and the ingress of dirt or salt particles, which is especially critical in marine and offshore environments. Its durable construction ensures long service life and supports cleaner, safer maintenance procedures, contributing to the overall reliability and operational integrity of the engine.

The O-ring H 27106 is a critical sealing element used in the Sulzer ASL25 engine to provide a leak-free interface in fluid and pressure connections. Manufactured from elastomer specifically selected for resistance to oil, temperature fluctuations, and vibration, this O-ring maintains elasticity and sealing efficiency throughout extended service life. By preventing fluid loss and protecting internal components from contamination, H 27106 plays an essential role in preserving system integrity, ensuring operational safety, and supporting consistent engine performance.

The cover with splash tube, code 11.01213-0057-1.0, is an integrated lubrication management component in the MAN L21/31 engine. Designed to control and direct the flow of lubricating oil inside the engine frame, the splash tube ensures targeted distribution to critical components such as bearings and gear assemblies. By preventing uncontrolled oil dispersion and reducing aeration, it enhances lubrication efficiency and minimizes wear. This component plays a vital role in maintaining oil cleanliness, reducing friction losses, and supporting reliable engine performance under continuous high-load marine and power generation conditions.

The round seal ring, code 06.56936-1507.A, is a precision sealing element used in various fluid systems of the MAN L21/31 engine, including lubrication, cooling, and fuel circuits. Designed to withstand pressure fluctuations, thermal expansion, and vibration, it ensures leak-free connections between mating components. Its resilient material composition provides consistent elasticity and long-term durability, even under demanding marine and industrial operating conditions. Though compact in size, this seal ring plays a decisive role in maintaining system integrity, preventing fluid loss, and safeguarding overall engine reliability.

The referral valve H 27440 “NOVA” is a specialized control component integrated into the Sulzer ASL25 engine’s fluid management system, designed to regulate or redirect flow within designated circuits. Engineered for accurate response, pressure stability, and durability under continuous operational stress, this valve ensures controlled system behavior and reliable protection of downstream components. Its robust construction and precise internal geometry support consistent performance, reduced leakage, and efficient flow regulation, contributing to overall engine reliability and operational safety.

The round seal ring, code 06.56936-1507.A, serves as a dependable sealing element within various systems of the MAN L21/31 engine. Engineered to withstand high pressure and thermal cycling, it ensures tight sealing between components in lubrication, cooling, or fuel circuits. Its circular geometry allows uniform load distribution, reducing the risk of deformation or leakage. Despite its modest size, this seal ring plays an indispensable role in maintaining engine cleanliness, operational efficiency, and long service life in both marine propulsion and stationary power generation applications.

The cylindrical pin, code 06.22020-1214.0, is a precision alignment and positioning element used throughout the MAN L21/31 engine assembly. Designed to ensure exact component placement, it maintains structural alignment between mating parts such as bearing caps, housings, and structural casings. Manufactured from hardened steel to withstand shear forces and vibration, this pin plays a crucial role in maintaining dimensional accuracy and long-term mechanical stability. Though compact in size, it is fundamental to ensuring repeatable assembly quality and reliable engine performance under demanding marine and industrial operating conditions.