Packaging machine with pressure control device and method

A packaging machine comprising:

• a forming station configured to form a package from a film;
• an atmosphere modifying station, in which an atmosphere within the package is modifiable by evacuation and/or gassing, wherein the atmosphere modifying station is disposed downstream of the forming station;
• and
• a pressure control device for modifying the atmosphere of the package, the pressure control device being configured to control an evacuation pressure and/or a gassing pressure, wherein the pressure control device comprises a first controllable 2/2-way valve and a second controllable 2/2-way valve which are arranged to influence at least one of the evacuation pressure or the gassing pressure by setting a volume flow, the first and second controllable 2/2-way valves are connected in parallel with one another and are independently controllable, wherein the pressure control device is configured to determine a volume flow set point profile, for an atmosphere modification process to be performed by the packaging machine, based on user inputs, and wherein the user inputs comprise one of a desired process speed, a desired fault tolerance, or a weighting between process speed and fault tolerance.