A vent valve arrangement for a sterilization container held under vacuum after completion of the sterilization, which container must be depressurized for opening, comprising a vent valve capsule which comprises a cavity enclosed by a circumferential wall, which cavity is closed on a first end by a manually irreversibly detachable cover and comprises an opening on the second end thereof. The capsule is designed such that prior to the sterilization of the sterilization container, it can be inserted under external seal into an opening of a wall of the sterilization container or a component thereof, in such a way that the end of the cavity closed by the cover lies on the outer side of the sterilization container and closes this opening in a gas-tight manner, while the cavity over the opening is constantly in connection to the interior of the sterilization container.
