The centrifugal bypass filter, code P51515-07, is a highly efficient secondary filtration system used in the MAN L21/31 engine to remove fine contaminants from lubricating oil. Unlike conventional filters, it uses centrifugal force to separate soot, sludge, and microscopic particles from the oil, ensuring cleaner lubrication and extending oil life. By maintaining optimal oil purity, the centrifugal bypass filter significantly reduces wear on critical engine components, enhances long-term durability, and supports reliable performance under the heavy operating demands typical of marine propulsion and continuous-duty power generation.
The expansion piece K 81136 is a flexible exhaust piping component featuring six corrugations, engineered to absorb thermal expansion, vibration, and movement within the ZV40/48 engine’s exhaust system. Its corrugated design allows controlled flexibility while maintaining strength and gas-tight performance under high-temperature exhaust flow. By reducing stress on rigid piping sections and preventing cracking or premature failure, this expansion piece significantly enhances the durability and reliability of the engine’s exhaust line, ensuring stable operation in demanding marine and industrial environments.
The attachment shaft K 81163 is a precision-machined connector used to anchor and support the guide element in the ZV40/48 engine’s structural system. Built for high mechanical strength and resistance to vibration, the shaft ensures stable alignment and smooth interaction between moving and stationary components. Its accurate geometry guarantees proper fit and long-term durability, reducing wear and maintaining the integrity of the guidance system. As a key interface component, K 81163 contributes to consistent operational reliability and extended service life of the engine’s auxiliary assemblies.
The weld-on piece K 81166 is a durable structural component designed to provide a stable mounting surface for the guide element within the Sulzer/Adriadiesel/Jugoturbina/Zgoda ZV40/48 engine. Manufactured to withstand thermal expansion, vibration, and continuous operational loads, this weldable part ensures precise positioning and secure integration into the engine’s support framework. Its robust design enhances the rigidity of the guide assembly, prevents misalignment over long operating periods, and contributes to the engine’s overall mechanical reliability.
The pressure regulating valve, code P51507-03, maintains optimal oil pressure within the MAN L21/31 engine’s lubrication circuit, protecting critical parts from both insufficient lubrication and excessive pressure. By automatically adjusting flow based on engine demand, this valve ensures stable operating conditions and contributes to consistent temperature control. Its precision and reliability make it indispensable for safeguarding engine health, especially during load fluctuations and extended operation in demanding environments.
The lubricating oil pump, code P51501-25, serves as the heart of the MAN L21/31 engine’s lubrication system, delivering pressurized oil to all bearings, gears, and moving components. Engineered for durability and flow consistency, the pump ensures that friction is minimized and heat is efficiently dissipated throughout the engine. Its stable performance is essential for preventing component failure, reducing mechanical losses, and supporting long-term reliability, particularly in high-load marine propulsion and industrial power generation applications.