Valve for Inerting Sytem with Termal ACtuator. The present proposal, called VISTAC, offers cooperation between GDTech, highll skilled company in the field of simulation of thermal, fluid and muliphysics behavior of aeronautical equipment and Equip’Aero TECHNIQUE, recognized design and production organization for aircraft fluid management equipment including innovative solutions. This strong partnership combines expertise in all required fields and experienced practice in working-in and managing research projects. These elements are a guarantee of VISTAC success. A low weight, low cost, high reliability and maintenability optimized multiposition valve will be developped for the needs of future generation of halon free fire extinguishing systems using a common On Board Inert Gas Generation (OBIGGS) with the fuel tank inerting system. State of the art knowledge of the partners in valves technologies will be associated with the development of a new generation of electromechanical actuator using thermal effects. Heat generated by electrical signal is converted into mechanical force and stroke by the mean of Shape Memory Alloys elements or thermostatic wax elements developped in the ATHT project already ongoing in Equip’Aero Technique R&T department. Valve developed will be maturated to TRL6 and will be ready for manufacturing to MRL6. Topic leader and partners may then be able to propose to further certification an optimized fire exitinguishing system with reduced environmental fooprint incorporating a smart multiposition valve. EU industrials and environment shall greatly benefit from this study, thanks to a strong dissemination plan and a wide communication strategy.