*Invited* On the Potentials of Shape Memory Alloy Activated Valves

Shape memory alloys (SMA) can be utilized as thermal and electrical activated drives for valve applications. By using the high actuation forces and medium strokes in combination with SMA intrinsic sensor functions, smart and versatile valve elements for multi-purpose applications can be designed. The sensoric functions, based on the change of the electrical characteristics of the SMA drive, allow to detect the system‘s condition as well as the system’s fatigue. A methodical overview over the engineering design of different applications is presented in the first part of the publications. Since the product development process is not only a mechanical engineering matter, the production and the service options according to such valves have to be regarded. Besides the methodical overview on the design-options, this publication presents an innovative production process based on a fused deposition production process (FDPP) of valves which contains the installation of shape memory alloy actuators during production. The presentation shows several demonstrator systems which have been produced with FDPP and analysed in applications.