The referral valve H 27440 “NOVA” is a specialized control component integrated into the Sulzer ASL25 engine’s fluid management system, designed to regulate or redirect flow within designated circuits. Engineered for accurate response, pressure stability, and durability under continuous operational stress, this valve ensures controlled system behavior and reliable protection of downstream components. Its robust construction and precise internal geometry support consistent performance, reduced leakage, and efficient flow regulation, contributing to overall engine reliability and operational safety.