The water washing system on the compressor side, code P51205-03, is a maintenance feature in the MAN L21/31 engine that enables the removal of dirt, salt, and oil build-up from turbocharger components. By injecting a controlled flow of water while the engine is running at partial load, it ensures optimal compressor efficiency, minimizes performance loss, and extends the service life of the turbocharger. This is especially valuable in marine and coastal operations where air contamination is high.

The screw connection K 92182 is a precision fastening element designed specifically for securing component K 92166 within the piping or structural systems of the ZV40/48 engine. Engineered to deliver strong, vibration-resistant engagement, this connection ensures proper alignment, mechanical stability, and leak-free performance in high-pressure, high-temperature conditions. Its robust thread integrity and corrosion-resistant material construction help maintain long-term reliability, preventing loosening or deterioration over extended operating periods. As a small but essential element, K 92182 plays a crucial role in maintaining the integrity and durability of the engine’s auxiliary assemblies.

The fuel supply pipe K 87160 is a precisely engineered conduit responsible for delivering a steady, contamination-free flow of fuel to the combustion system of the Sulzer/Adriadiesel/Jugoturbina/Zgoda ZV40/48 engine. Built to withstand high pressure, vibration, and continuous thermal stress, this pipe ensures uninterrupted and uniform fuel distribution to each cylinder, which is essential for stable engine performance and efficient combustion. Its robust construction and corrosion-resistant materials help prevent leaks, pressure drops, and premature wear, making K 87160 a critical component for reliable long-term operation in demanding marine and power-generation environments.

The frame covers, code P51106-36, are protective enclosures mounted on the MAN L21/31 engine’s structural frame to shield internal systems from environmental exposure. These robust panels safeguard against dust, moisture, and accidental contact, ensuring the cleanliness and safety of the engine’s inner mechanisms. Their precise fit and durable construction contribute to both noise insulation and thermal protection, supporting long-term engine reliability in harsh operating environments.

The complete relief valve assembly K 86050 is a safety-critical component installed on the starting air line of the Sulzer/Adriadiesel ZV40/48 engine, designed to protect the system from excessive pressure buildup during engine cranking. Engineered for rapid response and reliable opening under sudden pressure spikes, this valve prevents dangerous over-pressurization and safeguards both piping and auxiliary equipment. Its robust construction ensures consistent performance even in harsh operating conditions, while precise spring-loaded calibration maintains optimal safety margins. The K 86050 relief valve is essential for maintaining the integrity, reliability, and safe operation of high-pressure starting air systems on large marine and industrial engines.

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 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 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 housing coded K 87086 is the robust external casing of the pressure regulating valve used in the ZV40/48 diesel engine’s fuel or air systems. Designed to endure high pressures and fluctuating temperatures, it provides the structural base that contains internal components like springs, seals, and actuators. Made from precision-machined, corrosion-resistant materials, this housing ensures the valve operates safely and efficiently, while withstanding constant vibration and fluid dynamics. Its critical role is to maintain system stability by securely housing the mechanism that regulates pressure levels essential for optimal engine performance.

The actuator and its drive mechanism, identified by code P50901-31, play a central role in managing the timing and function of fuel delivery or valve systems in the MAN L21/31 engine. Operating either hydraulically or electronically, the actuator translates control signals into mechanical motion, ensuring fast and accurate adjustments. Its contribution is critical in dynamic engine environments, improving efficiency, emissions control, and responsiveness.

The angle thermometer with code K 92050 is a vital monitoring instrument installed at the fuel inlet of the ZV40/48 diesel engine. Designed with an angled dial for easier visibility and access, it provides real-time temperature readings to ensure fuel is entering the engine at optimal conditions. Monitoring fuel temperature is critical to combustion efficiency, performance, and the prevention of vapor lock or thermal stress. This robust and accurate thermometer supports safe engine operation, especially in applications with fluctuating ambient conditions or fuel quality.

The connecting piece with code K 92180 is a crucial interface component in the auxiliary systems of the Sulzer ZV40/48 diesel engine. Designed to link two separate fluid or mechanical subsystems, it ensures secure alignment and a leak-proof connection under pressure and vibration. Made from robust, corrosion-resistant material, this part maintains stability in marine and industrial environments. Its precise machining contributes to operational safety and system efficiency, supporting uninterrupted engine performance.

The camshaft bearing, code P50704-04, supports and guides the camshaft in the MAN L21/31 engine, enabling precise rotational movement required for accurate valve timing. Designed to handle the combined effects of radial loads, high-speed operation, and thermal expansion, this bearing ensures low-friction performance and extended engine life. Proper lubrication and high-quality material composition are essential for this component to minimize wear and preserve camshaft alignment over prolonged operation cycles.

The complete fine regulating valve, coded K 92166, is a precision-engineered component used for controlling fluid or air flow with high accuracy in the ZV40/48 diesel engine system. Often applied in instrumentation or auxiliary systems, this valve allows fine adjustments that are essential for calibration, pressure tuning, or flow control. Its construction ensures minimal leakage, high repeatability, and resistance to corrosion and pressure fluctuations. A vital part of precise engine control, this valve contributes to overall system responsiveness and reliability.

The intermediate piece coded K 31513 is a crucial connecting element within the vibration damping system of the Sulzer ZV40/48 diesel engine. Positioned between the crankshaft and the main damper unit, it ensures optimal transfer of rotating mass forces while isolating harmful vibrations. Designed from high-strength materials with precise tolerances, this component helps reduce mechanical stress on engine bearings and structural components. Its role is essential in extending engine lifespan and maintaining smooth and quiet operation, particularly under heavy load conditions.

The regulating device, code P50902-09, works in conjunction with the governor to finely control fuel injection timing and quantity in the MAN L21/31 engine. Precision-built and responsive, this component plays a pivotal role in optimizing combustion, reducing emissions, and improving responsiveness. It is a key contributor to the engine’s adaptability to fluctuating operational demands.

The pinion with code number K 32325 is a small but powerful gear mounted on the pinion shaft of the ZV40/48 diesel engine. This component engages with a larger gear to transmit torque and rotational energy with high precision. Its compact, hardened design allows it to withstand high stress and rapid motion, making it ideal for critical timing or drive mechanisms. The pinion's performance directly influences the efficiency and durability of gear transmissions, contributing to the reliable function of various auxiliary systems within the engine.

The worm gear with code number K 32322 is a critical drive component in the horizontal worm gear assembly of the Sulzer ZV40/48 diesel engine. Designed to transmit motion and torque efficiently at a right angle, this gear ensures smooth and precise rotational movement between the worm shaft and the gear wheel. Its robust construction from high-strength, wear-resistant alloy allows it to endure heavy loads and continuous operation under harsh marine and industrial conditions. The precision-cut gear teeth contribute to reduced vibration, minimal backlash, and long-lasting performance in the engine’s auxiliary systems.

The piston, code P50602-03, is a high-performance component at the heart of the MAN L21/31 engine’s combustion cycle. Made from heat-resistant alloys, it endures explosive pressures and high temperatures while moving rapidly within the cylinder liner. Its carefully engineered crown shape maximizes combustion efficiency, while its light weight and strength reduce inertia and wear. Designed for long service life, this piston plays a key role in fuel efficiency, emission control, and overall engine performance.