Abstract: A device for reducing the quantity of oxygen in the space above the filling in a container before closing of the container, in which a vacuum is formed in the space, then a compressed gas is blown into the container in a direction running obliquely to the vertical axis of symmetry of the container and again a vacuum is formed in the space, these steps being repeated if necessary. Valving is provided in the fixed housing within which are formed, coaxially with a central column, an inner chamber and an outer, essentially cylindrical chamber enclosing it. One chamber is connected to a vacuum source and the other chamber to a source of the gas. One head face of each chamber has a plurality of openings at specific angular distances from each other and disposed on an inner and an outer circle respectively. Fixed on the central column is a disc in sealing fashion against the head faces.