The present invention provides a gas valve arrangement having at least one main valve that has a valve closure element which is connected with a fluid-actuated drive device. One printing unit being disposed is available for set-up tasks while the other printing unit is working. The plugins may interface with an update system and respond to scan, download, and install commands from the orchestrator. The monitor monitors an operating state of the load apparatus to determine whether an abnormality exists in the load apparatus. When the assembly is in the open position one barrier is in an upper position with respect to the other.