The sealing ring H 21423 is a critical sealing component used in various fluid and pressure interfaces of the Sulzer ASL25 engine. Designed to provide a tight, leak-free barrier under varying pressure, temperature, and vibration conditions, this sealing ring protects internal engine components from contamination and prevents loss of working fluids. Manufactured from high-quality, application-optimized material, H 21423 ensures long service life, stable sealing performance, and contributes directly to the operational safety and efficiency of the engine.