The internal valve spring H 27092 is a critical dynamic component of the Sulzer ASL25 valve train, designed to maintain precise valve control under high engine speeds and continuous thermal stress. Installed within the valve assembly, this spring ensures consistent closing force and accurate valve timing throughout the engine cycle. Engineered for exceptional fatigue resistance and dimensional stability, H 27092 performs reliably under repeated compression and elevated operating temperatures, directly supporting combustion efficiency, reduced valve wear, and long-term operational stability of the engine.