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 screw H 74130 is a precision-engineered fastening element used throughout the Sulzer ASL25 engine to secure components and assemblies under continuous mechanical load. Designed to maintain consistent clamping force despite vibration, thermal cycling, and dynamic stresses, this screw ensures structural stability and correct alignment of connected parts. Its controlled material properties and accurate threading support reliable installation, resistance to loosening, and long service life, making H 74130 a small but essential contributor to overall engine reliability.
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 pressure gauge H 92062 is a precision measuring instrument used in the Sulzer ASL25 engine to provide accurate, real-time monitoring of system pressures in critical circuits such as lubrication, fuel, or cooling. Designed for reliable operation under vibration, temperature fluctuations, and continuous service conditions, this gauge ensures clear and stable readings essential for safe engine operation and diagnostics. Its robust construction and calibrated mechanism support long-term accuracy, enabling operators and maintenance personnel to detect abnormal pressure conditions early and maintain optimal engine performance.
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 Teflon ring with code 11.01299-0128.A is a precision sealing component used in the MAN L21/31 engine where low friction, chemical resistance, and thermal stability are required. Thanks to the inherent properties of PTFE (Teflon), this ring offers excellent resistance to wear, high temperatures, and aggressive fluids. It is typically applied in dynamic or sensitive sealing areas, where it helps ensure smooth movement, reliable sealing performance, and extended service intervals.
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 flame retardant H 86027 is a safety-critical protective component used in the Sulzer ASL25 engine to limit flame propagation and enhance fire safety in high-risk areas. Engineered to withstand elevated temperatures and exposure to combustible environments, this component provides an effective barrier against flame spread. Its robust, heat-resistant material supports compliance with fire-safety requirements and plays an important role in protecting personnel, equipment, and surrounding systems in marine and industrial engine installations.
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 pump rotor N 73111 is a precision-engineered rotating component designed for right-hand rotation in the Sulzer ASL25 engine’s pump system. Responsible for generating stable flow and pressure, this rotor ensures efficient fluid transfer under continuous operation. Manufactured with tight dimensional tolerances and balanced geometry, it minimizes vibration, reduces internal losses, and supports smooth pump performance. Its robust construction and wear-resistant surfaces contribute to long service life, reliable operation, and consistent system efficiency in demanding marine and industrial environments.