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 locking spring washer, code 06.16169-0004.2, is a critical safety element used to maintain the integrity of bolted joints in the MAN L21/31 engine. Its elastic design generates continuous preload, preventing loosening caused by vibration, thermal cycling, and dynamic mechanical loads typical for medium-speed diesel engines. By ensuring a constant clamping force and compensating for minor surface irregularities, it protects fasteners from self-rotation and preserves precise alignment of assembled components. This small but essential part significantly enhances operational reliability, reduces the risk of unplanned downtime, and supports long maintenance intervals.
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 O-ring H 21434 is a high-performance elastomeric sealing element used to achieve leak-free operation in pressure and fluid connections within the Sulzer ASL25 engine. Designed to retain its shape and elasticity under thermal cycling, vibration, and exposure to oil and fuel, it ensures a secure and flexible sealing interface between mating components. Despite its compact dimensions, this O-ring plays a vital role in preserving system pressure, preventing fluid loss, and protecting internal parts from contamination. Its durability and reliable sealing characteristics contribute significantly to stable engine performance and extended service life.
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 pipe seal H 16198 is a precision-engineered sealing element developed to ensure a tight and durable connection along pipe interfaces in the Sulzer ASL25 engine. With its accurately defined geometry (Ø18 × Ø8 × 1124), it effectively compensates for thermal expansion, vibration, and pressure variations in fluid circuits. Manufactured from high-quality, application-specific material, this seal prevents leakage, protects surrounding components from contamination, and supports the stable operation of lubrication, fuel, or cooling systems. Its consistent sealing performance plays a key role in maintaining system efficiency, operational safety, and long service intervals in demanding marine and industrial environments.