A blown film system for producing a blown film having • at least one extruder for producing at least one melt strand • at least one distribution tool for converting the at least one melt strand to a circumferential melt layer • an outlet nozzle for dispensing the at least one melt layer, wherein the at least one melt layer forms the blown film • at least one device for applying at least one fluid flow, in particular an air flow, to the blown film for cooling the blown film, wherein at least one pressure supply device is provided, with which the blown film can be brought to the device for applying a fluid flow to the blown film by means of at least a positive pressure and/or a negative pressure, wherein the pressure supply device is a component on or within the fluid application device, wherein the pressure supply device has a shape and/or an arrangement, with which an negative pressure can be generated due to the fluid flow flowing past, wherein a static negative pressure can be generated with the fluid flow the speed of which is increased, wherein the blown film can be brought to the fluid application device, characterized in that the pressure supply device comprises at least one ring, which comprises a plurality of modules distributed over the circumference for controlling the temperature and/or the volume flow, wherein in the interior of the ring the fluid flow can be guided in the direction of the blown film, wherein at the end of the interior facing the blown film a widened area is provided, in which a flow divider is provided, with which the fluid flow can be divided into two partial flows and can be deflected, so that a first partial flow can be deflected at least partially in the direction z and a second partial flow can be deflected at least partially against the direction z. • at least one extruder for producing at least one melt strand • at least one distribution tool for converting the at least one melt strand to a circumferential melt layer • an outlet nozzle for dispensing the at least one melt layer, wherein the at least one melt layer forms the blown film • at least one device for applying at least one fluid flow, in particular an air flow, to the blown film for cooling the blown film, wherein at least one pressure supply device is provided, with which the blown film can be brought to the device for applying a fluid flow to the blown film by means of at least a positive pressure and/or a negative pressure, wherein the pressure supply device is a component on or within the fluid application device, wherein the pressure supply device has a shape and/or an arrangement, with which an negative pressure can be generated due to the fluid flow flowing past, wherein a static negative pressure can be generated with the fluid flow the speed of which is increased, wherein the blown film can be brought to the fluid application device, characterized in that the pressure supply device comprises at least one ring, which comprises a plurality of modules distributed over the circumference for controlling the temperature and/or the volume flow, wherein in the interior of the ring the fluid flow can be guided in the direction of the blown film, wherein at the end of the interior facing the blown film a widened area is provided, in which a flow divider is provided, with which the fluid flow can be divided into two partial flows and can be deflected, so that a first partial flow can be deflected at least partially in the direction z and a second partial flow can be deflected at least partially against the direction z.