The research purpose of this proposal is to dimension, modelize and test a gas generator system (based on propergol) which will be integrated into a new extinguishers generation. The Belgian company DELTA, leader of this project, manufactures extinguishers since 1968, with a current production of about 1.000.000 of exemplaries per year. DELTA joins with EUROFEU and SNPE to lead the research and development program. EUROFEU is a French extinguishers manufacturer and SNPE a specialist in gas generator systems design. The new extinguishers should be characterized by: = higher compacity, security and efficiency (up to 35°c) = better protection of environment. The potential market represents about 1.000.000 extinguishers per year. Moreover, gas generator systems should be used in other pressurization applications, for instance induced by a rise of temperature and pressure. The research program CRAFT should allow to explore several opportunities of applications, as security valves.