The thermostat housing, code 11.41188-9001.0, is a critical component within the cooling system of the MAN L21/31 engine, designed to securely house the thermostat and regulate the flow of cooling water. With precisely machined sealing surfaces and optimized internal geometry, it ensures proper coolant distribution and stable temperature control under varying load conditions. Its robust construction allows it to withstand pressure fluctuations, thermal cycling, and continuous vibration typical of medium-speed diesel engines. By maintaining accurate thermostat positioning and leak-free coolant circulation, the housing supports efficient thermal management, protects engine components, and contributes to overall operational reliability.

The supporting ring, code 11.41199-0006.A, is a precision-engineered component designed to provide structural reinforcement and positional stability within assemblies of the MAN L21/31 engine. Acting as a load-distribution and alignment element, it ensures that connected components remain correctly positioned under mechanical stress, vibration, and thermal expansion. Manufactured from durable, wear-resistant materials, the supporting ring maintains its integrity over long operating cycles and demanding service conditions. By enhancing assembly stability and reducing the risk of misalignment or component fatigue, this component plays a key role in ensuring reliable engine operation and extended service life.

The bearing bush K 74109 is a precision-machined sliding bearing component used in conjunction with components K 74102, K 74112, and K 74118 within the Sulzer ZV40/48 engine. Its primary function is to provide a low-friction, wear-resistant support surface for rotating shafts, ensuring accurate alignment and stable operation under continuous load conditions. Manufactured from high-quality bearing materials with optimized lubrication properties, the bush reduces mechanical wear, absorbs vibrations, and enhances the durability of the associated assemblies. By maintaining consistent operating clearances and minimizing friction losses, the K 74109 bearing bush plays a vital role in ensuring long-term reliability and efficient performance of the fuel transfer pump system.

The O-ring, code 06.56936-2988.0, is a compact yet critical sealing element used throughout the MAN L21/31 engine to ensure leak-free operation across various systems. Designed with a precisely defined elastic profile, it compresses within its groove to create an effective seal against fluid leakage and contamination ingress under varying pressure and temperature conditions. Manufactured from high-performance elastomer materials resistant to heat, oil, and chemical exposure, it maintains its flexibility and sealing integrity over extended service periods. By protecting internal systems and reducing maintenance requirements, this O-ring plays a key role in ensuring operational safety, efficiency, and long-term reliability of the engine.

The lockring, code 06.29020-0202.0, is a precision retaining element designed to secure components in position within the MAN L21/31 engine assembly. Installed in designated grooves, it provides reliable axial retention, preventing movement of rotating or stationary parts under vibration, thermal expansion, and dynamic loads. Manufactured from high-strength spring steel and engineered for exact dimensional fit, the lockring ensures long-term stability and safe operation of critical assemblies. Its simple yet highly effective design enables quick installation and removal during maintenance, making it an essential component for maintaining alignment, structural integrity, and operational reliability in marine and power-generation applications.

The shaft seal K 73128 is an essential sealing element designed for installation in bearing housing K 73111 of the Sulzer ZV40/48 raw water pump assembly. Its primary function is to prevent the ingress of water and contaminants into the bearing area while retaining lubrication within the housing. Designed for continuous operation under rotating motion, pressure fluctuations, and exposure to moisture, this seal maintains reliable sealing performance and protects sensitive bearing components from premature wear. Manufactured with precision and durable sealing materials, the K 73128 shaft seal contributes to extended bearing life, reduced maintenance, and overall operational reliability of the pump system.

The supporting ring, code 11.41199-0006.A, is a precision component designed to provide structural support and positional stability within assemblies of the MAN L21/31 engine. Acting as a reinforcement or load-distribution element, it ensures that connected components remain correctly aligned and securely supported under mechanical stress and operational loads. Manufactured from durable materials with high resistance to deformation and wear, the supporting ring maintains its integrity even under demanding conditions involving vibration and temperature variation. By enhancing the stability of assemblies and reducing the risk of misalignment or component fatigue, this element contributes to the long-term reliability and efficient operation of the engine.

The O-ring, code 06.56936-2985.0, is a compact yet indispensable sealing element used across multiple systems of the MAN L21/31 engine to ensure leak-free operation. Designed with a precise elastic profile, it deforms under compression to create a tight seal between mating surfaces, effectively preventing the escape of fluids and the ingress of contaminants. Manufactured from high-performance elastomer materials resistant to heat, oil, and chemical exposure, the O-ring maintains flexibility and sealing integrity even under fluctuating pressures and temperatures. Its reliable performance supports system efficiency, protects critical components, and reduces maintenance demands in both marine and stationary diesel engine applications.

The expansion piece K 81138 is a critical flexible element within the exhaust piping system of the Sulzer ZV40/48 engine, designed to accommodate thermal expansion and mechanical movement during operation. Subjected to high exhaust temperatures and dynamic loads, this component absorbs axial and radial displacement, reducing stress on rigid piping sections and preventing structural damage. Manufactured from heat-resistant and fatigue-resistant materials, it ensures long-term durability and maintains gas-tight integrity. By compensating for thermal and mechanical stresses, the expansion piece enhances system reliability, reduces maintenance needs, and prolongs the lifespan of the exhaust assembly.

The cylindrical screw, code 06.02093-0820-1.B, is a precision fastening element used in the assembly of the MAN L21/31 engine, designed to provide secure and reliable connections between structural and functional components. Featuring accurately machined threads and a robust cylindrical head, it ensures consistent clamping force and precise alignment under mechanical loads, vibration, and thermal cycling. Manufactured from high-strength materials and often treated for corrosion resistance, this screw offers durability and long service life even in harsh operating environments. By maintaining stable fastening conditions and supporting structural integrity, the cylindrical screw plays an important role in the overall reliability and safety of the engine.

The O-ring, code 06.56936-3104.0, is a compact yet highly effective sealing component used throughout the MAN L21/31 engine to ensure leak-free connections between critical interfaces. Designed with a precisely defined elastic profile, it compresses within its groove to provide a reliable barrier against the escape of fluids and the ingress of contaminants under varying pressure and temperature conditions. Manufactured from high-performance elastomer materials resistant to heat, oil, and chemical exposure, the O-ring maintains long-term flexibility and sealing integrity. Its dependable performance helps protect internal systems, reduce maintenance requirements, and support the safe and efficient operation of marine and stationary diesel engines.

The reducer nipple K 92184 is a precision-machined connecting element used in the Sulzer ZV40/48 engine to join pipelines or components with different diameters. Designed for secure and leak-free connections under pressure, it enables smooth transitions between pipe sizes without causing flow disturbances or excessive pressure drops. Manufactured from durable, corrosion-resistant material, this component ensures long service life even in demanding operating environments. By maintaining system integrity and supporting efficient fluid transfer, the K 92184 reducer nipple plays an important role in the reliability of fuel, lubrication, or auxiliary piping systems.

The sleeve, code 11.41199-0005.A, is a precision-engineered component designed to provide alignment, support, and protection for mating parts within the MAN L21/31 engine assembly. Serving as a guiding or spacing element, it ensures correct positioning of adjoining components and helps distribute mechanical loads evenly across the assembly. Manufactured from durable materials capable of resisting wear, temperature fluctuations, and operational stresses, the sleeve contributes to the stability and longevity of connected parts. By maintaining precise alignment and reducing friction or vibration effects, this component plays an important role in preserving the efficiency, reliability, and service life of the engine.

The O-ring, code 06.56936-2985.0, is a compact but essential sealing element used throughout the MAN L21/31 engine to ensure leak-free connections between mating components. Designed with a precisely defined elastic profile, the O-ring compresses within its groove to create a reliable seal against fluids and gases under varying pressure and temperature conditions. Manufactured from high-quality elastomer materials resistant to heat, oils, and chemical exposure, it maintains its flexibility and sealing capability over long operating periods. By preventing the escape of lubricants or coolant and protecting systems from contamination, this simple yet highly effective component contributes significantly to the operational safety and efficiency of marine and stationary diesel engines.

The protective cocoon H 74134 serves as a shielding component within the Sulzer ASL25 engine assembly, designed to protect sensitive mechanical elements from debris, contamination, and mechanical impacts. Its structural design provides an additional protective layer around critical components that operate under vibration and dynamic loads. Manufactured with durable material and precise dimensions, the cocoon maintains the correct spatial arrangement of adjacent elements while reducing exposure to environmental influences. By safeguarding internal mechanisms, the H 74134 cocoon enhances reliability, extends component life, and supports stable engine performance in demanding marine and industrial environments.

The seal ring, code 06.56190-0705.0, is an important sealing element used to maintain leak-tight connections within various systems of the MAN L21/31 engine. Designed to operate reliably under fluctuating pressures, temperatures, and vibration levels typical of medium-speed diesel engines, it ensures consistent sealing performance over extended service periods. Manufactured from materials with excellent resistance to heat, wear, and chemical exposure, the seal ring prevents the escape of working fluids and protects internal components from contamination. By maintaining system integrity and operational safety, this component supports efficient engine performance and long-term reliability in marine and power-generation environments.

The locking spring washer, code 06.16169-0004.2, is a critical fastening element designed to secure bolted connections in the MAN L21/31 engine against loosening caused by vibration and dynamic operating loads. Its spring-like geometry creates a constant preload and additional friction between fastening surfaces, ensuring that bolts maintain their required clamping force during long operating cycles. Manufactured from high-strength, fatigue-resistant materials, the washer maintains its elasticity even under repeated thermal and mechanical stress. Though compact in size, this component plays a vital role in safeguarding engine assemblies, supporting structural integrity, and enhancing the reliability of marine and stationary diesel engine installations.

The GACO-ring H 74140 is a specialized sealing element used in the Sulzer ASL25 engine to ensure reliable sealing in rotating or dynamically loaded assemblies. Designed to combine the flexibility of elastomer sealing with enhanced mechanical stability, the GACO-ring maintains tight sealing performance even under fluctuating pressures, temperature variations, and vibration. Its precisely engineered profile enables consistent contact pressure between mating surfaces, preventing leakage and maintaining system integrity. By supporting effective sealing in demanding operating conditions, the H 74140 GACO-ring plays an important role in protecting internal engine components and maintaining efficient system operation.

The plug screw, code 06.08042-0142.B, is a durable closing element designed to seal threaded openings and service channels within the MAN L21/31 engine. Its precision-cut thread and carefully finished contact surfaces guarantee secure installation and leak-free performance under demanding operating conditions. Typically used to close drilling points, lubrication passages, or auxiliary ports, the plug screw allows easy access during inspection or servicing while ensuring reliable re-sealing after reinstallation. Manufactured from high-strength materials with protective surface treatment, it offers excellent resistance to corrosion, vibration, and thermal stress, supporting long-term engine reliability and operational safety.

The gasket, code 06.56936-2355.0, is a vital sealing component used to ensure tight and reliable connections between mating surfaces within the MAN L21/31 engine. Positioned between flanged or bolted interfaces, it compensates for minor surface irregularities and maintains leak-free operation under varying pressure and temperature conditions. Manufactured from high-quality materials resistant to heat, mechanical stress, and engine fluids, the gasket preserves sealing integrity throughout long service intervals. By preventing the escape of lubricants or cooling media and blocking the ingress of contaminants, this essential element supports safe engine operation, protects internal components, and contributes to overall system efficiency in demanding marine and power-generation environments.