The seal H 43630 is a critical sealing element used in the Sulzer ASL25 engine to prevent leakage of fluids and protect internal components from contamination. Designed to perform reliably under varying pressure levels, temperature fluctuations, and vibration, this seal maintains tight sealing integrity throughout extended service intervals. Manufactured from application-optimized, high-quality material, H 43630 ensures stable performance, protects adjacent components from wear or damage, and contributes directly to the safety, cleanliness, and efficiency of the engine’s lubrication or fluid systems.