The fuel pressure valve spring (code K 27257) is an integral component of the Sulzer ZV40/48 engine’s fuel injection system. Designed to regulate the pressure within the fuel delivery system, this spring ensures consistent fuel flow to the injectors, preventing misfires and fluctuations in engine performance. Manufactured under Adriadiesel, Jugoturbina, and Zgoda, this component must withstand high-pressure conditions while maintaining its elasticity. Over time, wear and fatigue can affect its function, making periodic inspections and replacements critical for engine longevity.