The piston ring coded K 27410 is designed specifically for the starting valve assembly, particularly for part K 27404. It provides a tight seal between the piston and valve housing, preventing air leakage during pressurized starts. Manufactured from high-performance materials, this ring resists deformation, wear, and thermal cycling. Its effectiveness is critical to maintaining the efficiency and responsiveness of the engine's pneumatic starting system.

The housing with code number K 27402 serves as the structural body of the starting valve in the ZV40/48 diesel engine. It encases the spindle and related internal components, providing robust protection and alignment. Built from corrosion- and pressure-resistant materials, this housing ensures the valve operates safely and efficiently under high-pressure air injection. Its design supports quick servicing and dependable engine starts even in harsh marine environments.

The spindle coded K 27401 is a key moving component of the starting valve in the ZV40/48 diesel engine. It functions as the actuator that enables or blocks compressed air flow to the cylinders during engine start-up. Engineered for high precision and durability, the spindle must operate flawlessly under sudden pressure changes and high thermal conditions. Its role is essential for reliable engine ignition and smooth transition to full operation.

The cover with splash tube, code 11.01213-0057-1.0, is an integrated component designed to direct lubricating oil inside the MAN L21/31 engine. It prevents uncontrolled splashing, reduces oil loss, and ensures targeted lubrication of internal parts such as bearings and gears. This component plays a crucial role in maintaining oil cleanliness, reducing wear, and supporting smooth engine operation in demanding conditions at sea or in power plants.

The lower spring plate, identified by code K 27502, is an essential support element for the inlet valve spring assembly in the ZV40/48 engine. It provides a stable base that maintains the correct spring tension, ensuring consistent valve timing and proper seating. This component must endure repeated cycles of compression and rebound, and it is built from durable materials to resist fatigue. Its role is crucial in ensuring that the inlet valve operates efficiently, helping the engine achieve optimal air intake and combustion performance.

The valve turning device with code K 27527 plays a critical role in prolonging the life of the exhaust valve in the ZV40/48 engine. By gradually rotating the valve during operation, this device distributes thermal and mechanical loads evenly across the valve face and seat, reducing localized wear and preventing carbon buildup. This results in better sealing, improved engine breathing, and extended service intervals, making it a vital element in maintaining reliable exhaust valve function over time.

The valve spindle, code number K 27521, is a core component of the exhaust system in the ZV40/48 diesel engine. It acts as the movable shaft that opens and closes the exhaust valve in synchronization with the engine cycle. Crafted from heat-resistant, wear-resistant materials, this spindle is designed to withstand extreme combustion temperatures and mechanical stress. Its precision engineering ensures tight sealing and smooth operation, directly affecting exhaust flow efficiency and overall engine performance.

The shim with code number K 27706 is a small but vital precision spacer used in the assembly of the relief valve in the ZV40/48 engine. It fine-tunes the valve’s operational clearance and spring tension, directly influencing the opening pressure and response characteristics. Made from durable, corrosion-resistant material, the shim ensures stable valve performance and consistent system protection. Its accurate thickness control allows technicians to calibrate pressure limits with high precision, ensuring both efficiency and safety in demanding operating environments.

The relief valve coded K 27700 serves a critical safety function in the ZV40/48 diesel engine by regulating excessive pressure within the system. It automatically opens when pressure exceeds the preset limit, protecting sensitive components from potential damage. Engineered for durability and precision, the valve ensures smooth operation under high-pressure conditions while maintaining system stability. This component is essential for preserving the safety, performance, and longevity of both marine and industrial diesel engine installations.

The conical clamping half-ring, marked with code number K 27529, is a key component in securing the exhaust valve assembly of the ZV40/48 diesel engine. Its conical geometry ensures uniform pressure distribution during valve installation and operation, reducing localized stress on the valve stem and associated parts. Designed to endure high thermal loads and constant vibration, this precision-engineered ring plays a vital role in maintaining valve alignment and sealing integrity, ultimately contributing to the engine’s reliable exhaust flow and long-term durability.