Total release dispensing valve

The valve assembly can use electric power or can automatically and essentially emit the aerosol content from an aerosol container (12) altogether by jet once, without making it operate manually continuously. A diaphragm (40) demarcates partially at least the accumulation chamber (36) which receives an aerosol chemical substance from a can (12) in the case of an accumulation stage. If the internal pressure of an accumulation chamber (36) reaches a predetermined threshold value, a diaphragm (40) will move with a seal so that an exit channel (51) may be opened, and spraying of main active chemical substances will be started. While the pressure of the chemical substance in a can rises, a diaphragm (40) is held by the latch which will operate if a diaphragm (40) moves to a distribution position at 開位置.