Device for storing and a controlled delivery of a pressurized product

A device for storing and a controlled delivery of a pressurized product (16), comprising a substantially dimensionally stable outer container (1);

• a flexible inner container (2) for storing the pressurized product (16) and located in the outer container (1) and formed of a foil having at least one layer (2a) formed of a substantially diffusion-proof material;
• at least one of a pressurized liquid motive means and a pressurized gaseous motive means located in an intermediate space between the outer container (1) and the inner container (2);
• and a valve (3) for connecting the outer (1) and inner (2) containers, the valve (3) having a housing (7) for connecting the outer and inner containers (1), a piston (11), and a sealing region which is formed a stop surface (19) provided on the outer container (1) and facing in a direction opposite to a delivery direction of the pressurized product (16), a sealing surface (12) provided on the valve piston (11) and facing in the delivery direction, and a valve sealing ring (14) located between the stop surface (19) of the outer container and the sealing surface (12) of the valve piston (11), the valve sealing region being arranged in an interior of the inner container (2).