The spiral seal H 81153 is a high-performance sealing component designed to provide reliable sealing in demanding interfaces of the Sulzer ASL25 engine. Its spiral geometry allows effective compensation for thermal expansion, pressure variations, and surface irregularities, ensuring a tight and durable seal under dynamic operating conditions. Manufactured from heat- and pressure-resistant material, this seal minimizes leakage, protects adjacent components, and contributes to the long-term integrity and efficiency of fluid and gas systems within the engine.