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 washer, code 06.16169-0004-1.A, is a fundamental load-distribution component used throughout the fastening systems of the MAN L21/31 engine. Positioned between a bolt head or nut and the contact surface, it ensures even pressure distribution and protects machined surfaces from damage during tightening. Manufactured with strict dimensional accuracy and from durable materials, the washer withstands high clamping forces and repeated mechanical loading without deformation. By improving joint stability and preserving the integrity of fastening surfaces, this simple yet essential component contributes significantly to the durability and operational reliability of the engine.
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 O-ring H 82409 is a precision elastomer sealing component widely used within the Sulzer ASL25 engine to provide leak-free sealing in fluid and pressure interfaces. Engineered to maintain elasticity and resistance to oil, fuel, and temperature fluctuations, this O-ring ensures dependable sealing between mating components. Its compact design allows easy installation into dedicated sealing grooves, where controlled compression provides a durable barrier against leakage and contamination. Despite its small size, the H 82409 O-ring is essential for maintaining system pressure stability, protecting internal engine systems, and supporting long-term operational reliability.
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 component N 73104, often referred to as a protective “cocoon,” serves as a structural shielding element within the Sulzer ASL25 engine assembly. Its function is to protect sensitive mechanical components from contamination, mechanical damage, and external environmental influences during operation. Manufactured with robust material and precise geometry, this protective enclosure helps maintain stable working conditions for adjacent components while minimizing exposure to vibration and debris. By safeguarding critical internal elements, the N 73104 cocoon contributes to improved reliability, reduced wear, and the long-term durability of the engine’s mechanical systems.