The gasket with code 06.56936-2355-1.0 is an essential sealing element in the MAN L21/31 engine, used to prevent leakage of fluids or gases between mating surfaces. Designed to withstand pressure, temperature fluctuations, and chemical exposure, this gasket ensures reliable sealing in systems such as lubrication, cooling, or fuel circuits. Its precise fit and material properties contribute directly to engine cleanliness, efficiency, and operational safety, making it indispensable for long-term, trouble-free engine operation in marine and industrial applications.

The tie rod with code 11.01295-0277-1.B is a critical structural fastening element in the MAN L21/31 engine, designed to clamp major engine components such as the cylinder head and crankcase with uniform and controlled pre-tension. Engineered to withstand high mechanical loads, thermal expansion, and continuous vibration, this tie rod ensures even load distribution and long-term dimensional stability of the engine structure. Its high-strength material and precise manufacturing are essential for maintaining sealing integrity, minimizing distortion, and supporting reliable operation in demanding marine and power generation environments.

The nut H 11152 is a high-strength fastening component used in the Sulzer ASL25 engine to secure bolted joints subjected to continuous vibration and mechanical stress. Engineered to maintain consistent clamping force under thermal cycling and dynamic loads, this nut ensures reliable retention of critical assemblies. Its precisely formed threads and controlled material properties support secure installation, resistance to loosening, and long service life, making it an essential element for maintaining structural stability and operational safety.

The cover with splash tube, code 11.01213-0057-1.0, plays a key role in maintaining proper lubrication conditions within the MAN L21/31 engine. Designed to guide lubricating oil precisely where it is needed, it minimizes oil losses and reduces the risk of contamination or foaming. Its robust construction and precise fit contribute to long service life, lower maintenance demands, and reliable engine performance in demanding marine and stationary power environments.

Round steel bars with code EN43AE01100028 are high-quality alloy steel materials used in the manufacture and refurbishment of critical MAN L21/31 engine components. Thanks to their excellent strength, toughness, and machinability, these bars are ideal for producing precision parts such as shafts, pins, studs, and structural elements. Their stable metallurgical properties ensure consistent performance under high mechanical loads and thermal stress, making them an essential base material for reliable marine and power-generation engine applications.

The spring H 74138 is a functional mechanical component used in the Sulzer ASL25 engine to apply controlled force and ensure correct operation of associated assemblies, such as valves or regulating mechanisms. Engineered for high fatigue resistance and dimensional stability, this spring maintains consistent performance under repeated compression, vibration, and thermal stress. Its precisely defined spring characteristics contribute to reliable system response, reduced wear of moving parts, and stable long-term operation of the engine.

Cylindrical pins with code EN1P1228 are essential alignment components used throughout the MAN L21/31 engine to ensure precise positioning of parts such as bearing caps, housings, and covers. Made from hardened steel, these pins provide high shear strength and wear resistance, allowing for accurate assembly and repeatable reassembly during maintenance. Their role is vital in preserving geometric accuracy, preventing misalignment, and maintaining the overall mechanical stability of the engine.

The QS cylinder crankcase with code 0743748-6.2 forms the primary structural backbone of the MAN L21/31 engine, housing the crankshaft, bearings, and cylinder assemblies. Designed to withstand high mechanical loads, combustion forces, and continuous vibration, this crankcase ensures precise alignment of all rotating components. Its robust construction and quality specification (QS) compliance are critical for maintaining engine rigidity, reducing deformation, and supporting reliable long-term operation in demanding marine and power generation applications.

The spiral seal H 81153 is a high-performance sealing component designed to provide reliable sealing in demanding interfaces of the Sulzer ASL25 engine. Its spiral geometry allows effective compensation for thermal expansion, pressure variations, and surface irregularities, ensuring a tight and durable seal under dynamic operating conditions. Manufactured from heat- and pressure-resistant material, this seal minimizes leakage, protects adjacent components, and contributes to the long-term integrity and efficiency of fluid and gas systems within the engine.

The protecting cap with code 11.01251-0048.0 is designed to shield exposed engine components or connection points on the MAN L21/31 engine from contamination, mechanical damage, and environmental influence. Commonly used during operation, maintenance, or storage, this cap helps prevent the ingress of dust, moisture, and debris. Its durable construction contributes to preserving component condition, reducing wear, and supporting safe and efficient maintenance procedures in marine and industrial settings.

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.

The compensator H 81168 is a functional mechanical element used in the Sulzer ASL25 engine to absorb dimensional changes caused by thermal expansion, vibration, or alignment tolerances within connected systems. By allowing controlled movement while maintaining system integrity, this compensator reduces mechanical stress on adjacent components and piping. Designed for durability and operational stability, H 81168 helps prevent fatigue damage, improves reliability of connected assemblies, and contributes to smoother long-term engine operation.

The tie rod with code 11.01295-0278.E is a high-strength structural component used to clamp and stabilize major engine assemblies in the MAN L21/31 engine, such as the cylinder block and crankcase. Designed to withstand extreme tensile loads, temperature variations, and vibration, the tie rod ensures uniform load distribution and structural rigidity throughout the engine. Its precise manufacturing and robust material properties are crucial for maintaining alignment, preventing distortion, and supporting safe, long-term operation in demanding marine and power generation environments.

The gasket with code 06.56936-2355.0 is a critical sealing component in the MAN L21/31 engine, designed to prevent leakage of oil, fuel, coolant, or combustion gases between mating surfaces. Manufactured from high-quality, heat- and pressure-resistant materials, this gasket ensures reliable sealing even under severe thermal cycling and vibration. Proper gasket performance is essential for maintaining system pressure, protecting internal components, and ensuring long-term engine efficiency and operational safety in marine and stationary power applications.

The O-ring H 40070 is a vital sealing element used throughout the Sulzer ASL25 engine to ensure leak-free connections in fluid and pressure systems. Engineered to maintain elasticity and sealing performance under varying pressures, temperatures, and vibration levels, this O-ring prevents leakage of oil or other working fluids and protects internal components from contamination. Its application-optimized material and precise dimensional control support long service life, reliable sealing, and consistent performance in demanding marine and industrial operating environments.

Cylindrical pins with code EN1P1228 are essential alignment and locating elements used throughout the MAN L21/31 engine assembly. These precision-machined pins ensure accurate positioning of components such as bearing caps, housings, covers, and structural parts during assembly and maintenance. Made from hardened steel, they provide high shear strength and excellent wear resistance, enabling repeatable disassembly and reassembly without loss of alignment. Their role is critical for maintaining geometric accuracy, minimizing stress concentrations, and supporting the long-term mechanical stability of the engine.

The guide bearing cap with code 11.01254-0169.A is a precision structural component in the MAN L21/31 engine, designed to secure and support guide or bearing elements within the crankcase assembly. Its primary function is to maintain accurate alignment of rotating or guiding components, ensuring stable operation under high mechanical loads. Manufactured to tight tolerances and from high-strength materials, this bearing cap contributes to reduced vibration, controlled load distribution, and long-term reliability of the engine’s bearing system, particularly in continuous-duty marine and power generation applications.

The seal N 71091 is a critical sealing element used in the Sulzer ASL25 engine to prevent leakage of fluids and protect internal systems from contamination. Designed to maintain reliable sealing performance under fluctuating pressures, temperature variations, and continuous vibration, this seal ensures stable operation throughout extended service intervals. Its application-optimized material and precise manufacturing support long service life, safeguard adjacent components, and contribute directly to the cleanliness, efficiency, and safety of the engine’s fluid systems.

Flat steel bars with code EN43AG12080060 are high-quality raw materials used in the fabrication and repair of structural and mechanical components for the MAN L21/31 engine. Manufactured from alloy steel with excellent strength, toughness, and machinability, these bars serve as the base material for brackets, supports, plates, and custom-engineered parts. Their consistent dimensions and metallurgical properties ensure that finished components meet strict engine standards, contributing to long service life and mechanical integrity in heavy-duty marine and industrial installations.

The ball valve with code 1602647-9.2 is a robust shut-off and control component used in the MAN L21/31 engine’s fluid systems, such as lubricating oil, fuel, or cooling circuits. Featuring a spherical closing element with a through-bore, this valve enables fast, reliable on/off operation with minimal pressure loss. Its durable construction ensures tight sealing even under high pressure, temperature fluctuations, and vibration, making it well suited for demanding marine and power generation environments where operational safety and service reliability are critical.