Abstract: Valve for discharging foaming agents from pressurized containers with said valve sealing off the pressurized container to the outside and being provided with an outlet opening furnished with a closure part (4) movably arranged therein and retained in closed position by means of a spring element (21) and, when actuated externally, clearing an outlet opening for the foaming agent present in the pressurized container, said valve being mounted on a container cover designed to function as a valve disk (1), so that the valve disk (1) has a sealing face designed to act as valve seat (6) with said sealing face interacting with a sealing element (7), and the valve disk (1) and the sealing element (7) being made of a rigid, functionally non-deformable material and the sealing effect being brought about by an elastic element (17) arranged on the valve disk (1), and the spring element (9, 21, 30) that holds the sealing element (7) in closing position being directly secured to the valve disk (1).

Abstract: A method is disclosed for processing residue-containing packages so as to receive valuable materials, in particular pressure containers for dispensing foams with propellant gases. For that purpose, extraction with a solvent is carried out essentially in atmosphere of propellant gas and/or solvent vapors.

Abstract: The invention concerns the method and apparatus for processing remnant-holding packagings while recovering substances of value, said method including the following steps: The packagings are inserted into an operational vessel 13, and the residues are extracted using a solvent. The residue-containing solution from the operational vessel 13 is transferred into a sump. The residue-holding solution is concentrated in the sump while the solvent is evaporated in an evaporation station 19. The evaporated solvent is condensed in a condensing station 20. The solvent is recycled from a recycling station 22 into the operational vessel 13. The residues are enriched and then recovered in concentrated form from the sump.