System for the sterile or aseptic filling of bottles or similar receptacles, with a receptacle supplying mechanism (1.1), by means of which the receptacles to be filled are supplied to the system, with a receptacle discharge mechanism (1.2) by means of which the filled and closed receptacles are removed from the system, with at least one device configured as a filler for the filling of the receptacles and with a device configured as a closing device for closing the filled receptacles, and with a housing, which forms at least one sterile space, in which the receptacles are in each case taken up by a receptacle region exhibiting a receptacle opening (2.1) during the filling and closing, and which can be subjected to a sterile gaseous and/or vaporous medium, wherein at least one further housing (25, 25a) is provided for, which surrounds the housing forming the at least one sterile space on at least one part region and forms the receptacle supplying mechanism (1.1) and the receptacle discharge mechanism (1.2), wherein the at least one sterile space opens at a receptacle inlet and at a receptacle outlet into the interior of the second housing (25, 25a), and wherein the sterile space is configured for a complete take-up of the receptacles, wherein at least one device comprises a transport element in the form of a rotor (5.1, 6.1, 7.1) which can be driven such as to rotate about a vertical machine axis (MA5, MA6, MA7), formed at which are treatment positions (21, 22) for the receptacles, wherein the sterile space is delimited in the region of this device by at least one wall element, formed by the rotor and moved with the transport element, as well as by at least one wall element of the housing, not moved with the transport element, wherein a device is configured for subjecting the at least one sterile space to the sterile gaseous and/or vaporous medium, in such a way that the pressure of this medium in the sterile space is greater than the ambient pressure, and wherein the sterile space is configured for a flow of the sterile gaseous and/or vaporous medium in a first flow direction from a medium inlet in the direction to the receptacle supplying mechanism (1.1), and in a second flow direction from a medium inlet to the receptacle discharge mechanism (1.2), characterised in that the wall element, which is moved, closes off with a circular cylindrical wall section (17.1), concentrically surrounding the machine axis (MA5, MA6, MA7), the sterile space radially inwards related to this machine axis (MA5, MA6, MA7), and closes off the sterile space on its upper side with a ring-shaped upper wall section (17.2), concentrically surrounding the machine axis (MA5, MA6, MA7), and the wall element, which does not circulate, closes off the sterile space with a wall section (18.1) surrounding the machine axis (MA5, MA6, MA7), radially outwards in relation to this machine axis (MA5, MA6, MA7), and closes off the sterile space with this wall section (18.2) on the under side, wherein, at the transition points between the wall element with moves with the transport element and the wall element which is not moved with the transport element, in each case a seal is provided, configured as a labyrinth seal, and wherein the at least one seal is accommodated in the interior of the further housing (25, 25a), and that a part flow of the first flow direction and/or a part flow of the second flow direction in the direction of at least one central