The lock nut K 87093 is a precision-engineered securing component used on spindle K 87088 within the pressure-regulating systems of the Sulzer/Adriadiesel/Jugoturbina/Zgoda ZV40/48 diesel engine. Designed to maintain exact axial positioning under extreme vibration and thermal cycling, this lock nut ensures the stability and reliability of the valve mechanism throughout long operating intervals. By preventing loosening, thread damage, and micro-movement under load, it plays a vital role in safeguarding the accuracy of the regulating assembly, directly supporting consistent engine performance and long-term durability across demanding marine and power-plant environments.
The mounting of the turbocharger-to-turbocharger (tc-tc) system, code P51203-38, involves secure and vibration-resistant installation of critical turbocharging components in the MAN L21/31 engine. This arrangement ensures mechanical stability, optimal alignment, and efficient airflow between turbochargers, which is essential for balanced boost pressure and consistent engine performance. Proper mounting safeguards the longevity and effectiveness of the turbocharging system, especially under high-load, high-speed marine engine conditions.
The exhaust pipe arrangement, code P51202-10, ensures the safe and efficient expulsion of exhaust gases from the MAN L21/31 engine. Designed with optimized flow dynamics, this system reduces back pressure, minimizes heat buildup, and helps control noise and emissions. Its robust and corrosion-resistant design is critical in harsh marine environments, maintaining reliable operation while supporting overall engine performance and compliance with environmental standards.
The charging air cooler, code P51201-21, is a vital component in the MAN L21/31 engine’s turbocharging system, designed to cool compressed air before it enters the engine cylinders. By reducing the temperature of the intake air, the cooler increases its density, allowing more oxygen to enter the combustion chamber. This results in improved combustion efficiency, increased engine power, and reduced thermal stress on engine components, all while contributing to lower emissions and better fuel economy in marine and industrial applications.
The SERTO screwed union coded K 87162 is a precision-engineered connector used to securely join sections of the fuel piping system in the Sulzer ZV40/48 diesel engine. Designed for high-pressure environments, it features a tight-sealing thread system that ensures leak-free operation even under thermal expansion and vibration. Known for ease of installation and reusability, the SERTO design is favored in critical fuel delivery systems where reliability and maintenance access are priorities. This union plays a key role in maintaining uninterrupted fuel flow and overall system integrity.
The spring identified with code K 87091 is an essential load-bearing element within the pressure regulating valve of the ZV40/48 engine. Its purpose is to apply the necessary preload force that determines the valve’s opening pressure, allowing precise control of fluid or gas flow under varying operational conditions. Built from high-tensile alloy steel, the spring resists fatigue and deformation across thousands of cycles, ensuring consistent pressure regulation. Its resilience directly affects system efficiency, safety, and responsiveness in both marine and industrial applications.