The grooved piston ring K 34410 is a specially configured sealing and guiding component for the operating piston of the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 engine. Its grooved geometry distinguishes it from a conventional plain piston ring and is intended to provide the specific functional characteristics required by its position within the piston assembly, while supporting effective sealing and controlled relative movement between the piston and surrounding surface. The component operates under repeated sliding motion, cyclic mechanical loads, vibration, and changing temperatures, making wear resistance, dimensional accuracy, and correct surface condition particularly important. Proper fit within its designated groove is essential for maintaining the intended ring movement and contact characteristics without excessive friction or clearance. By preserving the designed sealing and guiding conditions of the operating piston, the K 34410 grooved piston ring supports consistent mechanism performance, reduces the risk of premature wear, and contributes to dependable long-term operation of the ZV40/48 engine.