A packaging tray for use in a blood processing system including a blood processing device having device components arranged on a component surface and a removable fluid flow circuit having circuit components configured to interact with corresponding device components, wherein the packaging tray configured to be selectively arranged on and removable from the component surface. The packaging tray includes a first surface and a second surface opposite to the first surface and spaced apart by a thickness, component sections arranged at positions corresponding to positions of respective device components, the component sections respectively formed, at least partially, as openings extending through the thickness, and a plurality of recessed pathways formed on the first surface, the recessed pathways extending between the component sections. A blood processing device may include the packaging tray, and a blood processing system may include a blood processing device and the packaging tray.