The support K 43581 is an important structural and mounting component of the automatic starting-air stop valve arrangement used in the starting-air system of the Adriadiesel/Jugoturbina/Zgoda/Sulzer ZV40/48 engine. Its primary function is to provide secure mechanical support and correct positioning of the associated valve assembly, helping maintain proper alignment, stability, and accessibility during installation, operation, and maintenance. Depending on the specific arrangement, the support may also help transfer mechanical loads from the valve and connected piping to the supporting structure, reducing unnecessary stresses on valve connections and sealing interfaces. Accurate dimensions, suitable material strength, correct mounting geometry, and resistance to vibration are particularly important because improper alignment, insufficient fastening, or deformation can create additional mechanical loads, contribute to loosening, and potentially affect the reliability of the starting-air system. During engine operation, the K 43581 support may be subjected to continuous vibration, pressure-related forces transmitted through connected components, temperature variations, and long periods of operational readiness, requiring adequate stiffness, fatigue resistance, and corrosion protection. During maintenance or overhaul, the support should be inspected for cracks, corrosion, deformation, worn mounting surfaces, damaged fastening points, and signs of loosening, while the condition of associated bolts, brackets, and connected components should also be verified. By ensuring stable mounting and accurate positioning of the automatic starting-air stop valve, the K 43581 support contributes to reduced mechanical stress, reliable valve operation, easier maintenance, and dependable long-term performance of the ZV40/48 starting-air system.