Abstract: The invention relates to a device for explosion decoupling of two system parts. Dust that is capable of exploding can be fed in the process from a first system part in an air flow via a pipeline (3) into a container of the second system part. A non-return flap (8) is provided in a pipe element (9) integrated into the pipeline (3). The non-return flap (8) is opened by the air flow and closed when there is an explosion in the container because of the explosion pressure that arises. The non-return flap (8) makes contact with a limit stop (11) in the pipe element (9) when it is closed. A locking device (12) is provided on the outside of the pipe element (9) by means of which the non-return flap (8) is secured in the closed position.