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.

The seal H 27093 is a critical sealing component designed to prevent fluid leakage and protect internal engine systems of the Sulzer ASL25 from contamination. Engineered for reliable operation under fluctuating pressures, temperature changes, and vibration, this seal maintains stable sealing performance over extended service intervals. Its high-quality, application-optimized material ensures durability, protects adjacent components, and directly supports the safety, cleanliness, and efficiency of the engine’s lubrication or fluid circuits.

Plug screws with code EN47R13 are critical sealing components in the MAN L21/31 engine, used to close threaded openings in oil, fuel, or cooling systems. Designed to resist pressure, temperature fluctuations, and vibration, these screws ensure leak-free operation and protect internal systems from contamination. Their reliable sealing performance and robust construction make them a key element in maintaining engine cleanliness, safety, and consistent performance during prolonged operation.

The cylindrical screws with code EN61T612 are essential fastening elements used throughout the MAN L21/31 engine to secure components under high mechanical loads and vibration. Featuring a cylindrical head design that allows precise torque application, these screws ensure reliable clamping force and accurate alignment of engine parts. Manufactured from high-strength steel, they are engineered to withstand thermal cycling, dynamic stresses, and long-term operation, making them indispensable for maintaining structural integrity and operational safety in marine and power generation applications.

The A ring H 27098 is a functional retaining and positioning element used in selected assemblies of the Sulzer ASL25 engine to secure components in their correct axial or radial position. Engineered to withstand vibration, thermal variation, and mechanical loads, this ring ensures dimensional stability and prevents unintended movement during engine operation. Manufactured with tight tolerances and durable material, the H 27098 ring contributes to assembly integrity, reduced wear of adjacent parts, and consistent long-term performance of the engine.

The welding plate with code 703020-8.2 is specifically designed for welded joints within the MAN L21/31 engine structure or its auxiliary assemblies. Optimized for high-quality welding, it provides a strong and fatigue-resistant connection capable of handling thermal expansion, mechanical stress, and vibration. This welding plate plays an important role in ensuring structural strength and durability, particularly in harsh marine environments where long service life and mechanical integrity are essential.

The plate with code 2196069-1.0 is a structural component used within the MAN L21/31 engine to provide reinforcement, load distribution, or separation between adjacent assemblies. Precisely manufactured for accurate fitment, it helps maintain alignment and mechanical stability under continuous vibration and operating loads. Made from durable, high-strength material, this plate contributes to the robustness of the engine structure and supports long-term reliability in demanding marine and power generation environments.

The upper spring plate H 55049 is a robust load-distribution component used within the fuel pump or valve spring assembly of the Sulzer ASL25 engine. Designed to provide precise seating and even force transmission from the spring to adjacent components, it helps maintain accurate mechanical operation under continuous cyclic loading. Engineered for dimensional stability, vibration resistance, and long-term durability, this spring plate reduces localized stress, prevents premature wear, and contributes to the overall reliability and consistency of the fuel or valve actuation system.

Cylindrical screws with code EN61T612 are precision fasteners widely used throughout the MAN L21/31 engine for securing components where reliable clamping and accurate alignment are essential. Manufactured from high-strength alloy steel, these screws are designed to withstand vibration, thermal cycling, and repeated tightening during maintenance. Their consistent quality and mechanical strength ensure secure assemblies, supporting safe operation and long service life of the engine in demanding industrial and marine conditions.

The plate with code 1699385-9.0 is a structural and functional component used in the MAN L21/31 engine assembly to provide support, reinforcement, or separation between engine elements. Designed for precise fit and load distribution, this plate helps maintain alignment and structural stability under continuous mechanical stress and vibration. Manufactured from high-quality steel, it contributes to the durability of the engine structure and plays an important role in ensuring long-term reliability in marine and power-generation applications.

The oil pressure regulation valve H 85700 is a vital control element in the lubrication system of the Sulzer ASL25 engine, responsible for maintaining oil pressure within precise operating limits. Designed for fast response and stable regulation under varying engine loads and temperatures, this valve protects bearings and moving components from both insufficient and excessive oil pressure. Its precision-machined internal geometry and robust spring mechanism ensure reliable performance, reduced mechanical stress, and long-term protection of the engine’s lubrication circuit.

The pipe clamp with code 1621702-2.2 is a fastening and support element designed to securely fix pipes within the MAN L21/31 engine installation. Its role is to stabilize pipelines carrying fuel, lubricating oil, cooling water, or air, preventing unwanted movement caused by vibration, pressure changes, or thermal expansion. Robust in design and resistant to corrosion, this clamp enhances system safety, minimizes fatigue-related failures, and supports an orderly, durable piping layout in marine and industrial engine environments.

The jet assist pipe with code 2196075-0.0 is a specialized auxiliary component in the MAN L21/31 engine, designed to support controlled fluid or air jet delivery within specific engine subsystems. Its primary function is to improve flow behavior by directing a focused jet toward targeted areas, assisting lubrication, cooling, or cleaning processes. Manufactured to withstand pressure, temperature variations, and vibration, the jet assist pipe contributes to enhanced system efficiency, reduced component wear, and reliable engine operation in marine and stationary power applications.

The seal H 43630 is a critical sealing element used in the Sulzer ASL25 engine to prevent leakage of fluids and protect internal components from contamination. Designed to perform reliably under varying pressure levels, temperature fluctuations, and vibration, this seal maintains tight sealing integrity throughout extended service intervals. Manufactured from application-optimized, high-quality material, H 43630 ensures stable performance, protects adjacent components from wear or damage, and contributes directly to the safety, cleanliness, and efficiency of the engine’s lubrication or fluid systems.

Sleeves with code EN170H13 are precision-engineered components used in the MAN L21/31 engine to provide wear protection, alignment, or sealing between moving and stationary parts. Produced from high-quality alloy steel, these sleeves offer excellent resistance to abrasion, thermal stress, and mechanical loading. By maintaining correct clearances and protecting base components from wear, they play a vital role in extending component life, ensuring smooth operation, and reducing maintenance intervals in demanding marine and industrial environments.

The pipe with code 2101793-2.0 is an essential fluid-transfer component within the MAN L21/31 engine, used for conveying lubricating oil, cooling water, fuel, or air between critical engine systems. Designed to withstand high pressure, temperature fluctuations, and continuous vibration, this pipe ensures reliable and uninterrupted flow under demanding operating conditions. Its precise routing and robust material selection help maintain system efficiency, reduce the risk of leaks, and support long-term engine reliability in marine and power-generation applications.

The bearing stand H 45338 is a structural support component designed to house and stabilize bearing assemblies within the Sulzer ASL25 engine. Engineered to absorb high radial and axial loads while maintaining precise alignment, this bearing stand ensures smooth rotation of associated shafts and reliable load distribution under continuous operation. Manufactured from high-strength material with strict dimensional tolerances, H 45338 contributes significantly to vibration reduction, bearing longevity, and the overall mechanical integrity and durability of the engine.

The hydraulic tie rod with code 0743814-5.3 is a precision tensioning component used in the MAN L21/31 engine to secure the cylinder head and crankcase assembly with uniform clamping force. By applying controlled hydraulic pressure during tightening, the tie rod ensures even load distribution, compensates for thermal expansion, and minimizes distortion under high combustion pressures. This system enhances sealing reliability, reduces mechanical stress, and significantly improves engine durability, particularly during long operating cycles and frequent load variations.

The cylinder crankcase with code 11.01200-3593-1.L forms the core structural foundation of the MAN L21/31 engine, housing the crankshaft, main bearings, and lower sections of the cylinder assembly. Designed to withstand high combustion forces, torsional loads, and continuous thermal stress, the crankcase ensures precise alignment of all rotating components. Its rigid construction is essential for minimizing vibration, maintaining lubrication integrity, and guaranteeing long-term reliability in demanding marine propulsion and power generation applications.