Device for degassing polymer melts, in particular for the purpose of continuous post-processing to form drawn polymer films, comprising the following features: - a plasticising unit is provided, - at least one vacuum region is associated with the plasticising unit, - the at least one vacuum region is furthermore connected to a vacuum system via a vacuum line or degassing line at least via one vacuum separator (15; 15a, 15b), and - the at least one vacuum separator (15; 15a, 15b) comprises a vacuum separator housing having a gas inlet and a gas outlet, the gas inlet being at least indirectly connected to the vacuum region and the gas outlet being at least indirectly connected to the vacuum system, - the at least one vacuum separator (15; 15a, 15b) comprises cooling tubes which extend in parallel with one another in the container inner chamber of the vacuum separator housing, - a cleaning device is provided, which comprises a scraper or a wiper, is adapted to the cross-sectional shape of the cooling tubes and preferably to the course of the inner wall of the vacuum separator housing, and is movable at least in one partial vertical portion as far as to the bottom end of the cooling tubes. characterised by the following further features: - the cooling tubes have a double-wall design and comprise an outer tube, in which an inner tube extends, thereby forming a space, in such a way that coolant flows into the space between the outer tube and the inner tube via an outer tube supply line, and such that, inside the outer tube, said coolant can be recirculated into the inner tube via a remote circulation connection, and from there, in the opposite direction, to a coolant outlet, or vice versa, - the cooling tubes terminate at a spacing above a collection chamber or above the container floor of the vacuum separator housing - the at least one vacuum separator (15; 15a, 15b) provides a first filter stage, to which a second filter stage with at least one filter (25; 25a, 25b) is elocated, - a valve (35.1, 35.3), which can move between an open position and a closed position, is connected upstream of the first filter stage or of the vacuum separators (15; 15a, 15b) belonging to the first filter stage, and an additional valve (35.2, 35.4), which can move between an open position and a closed position, is connected downstream of the at least one or the at least two filters (25; 25a, 25b) of the second filter stage, and - the valves (35.1 to 35.8) can be operated by means of a drive, in that the cleaning device can be operated by means of the same drive or a separate drive (91, 89), and in that a control device is provided whereby the drive (89, 91) can be operated depending on pressures in line portions, for which purpose pressure sensors are provided in the line portions preferably between the first and second filter stage (F1, F2) and in the line portions upstream of the vacuum pumps. - a plasticising unit is provided, - at least one vacuum region is associated with the plasticising unit, - the at least one vacuum region is furthermore connected to a vacuum system via a vacuum line or degassing line at least via one vacuum separator (15; 15a, 15b), and - the at least one vacuum separator (15; 15a, 15b) comprises a vacuum separator housing having a gas inlet and a gas outlet, the gas inlet being at least indirectly connected to the vacuum region and the gas outlet being at least indirectly connected to the vacuum system, - the at least one vacuum separator (15; 15a, 15b) comprises cooling tubes which extend in parallel with one another in the container inner chamber of the vacuum separator housing, - a cleaning device is provided, which comprises a scraper or a wiper, is adapted to the cross-sectional shape of the cooling tubes and preferably to the course of the inner wall of the vacuum separator housing, and is movable at least in one partial vertical portion as far as to the bottom end of the cooling tubes. - the cooling tubes have a double-wall design and comprise an outer tube, in which an inner tube extends, thereby forming a space, in such a way that coolant flows into the space between the outer tube and the inner tube via an outer tube supply line, and such that, inside the outer tube, said coolant can be recirculated into the inner tube via a remote circulation connection, and from there, in the opposite direction, to a coolant outlet, or vice versa, - the cooling tubes terminate at a spacing above a collection chamber or above the container floor of the vacuum separator housing - the at least one vacuum separator (15; 15a, 15b) provides a first filter stage, to which a second filter stage with at least one filter (25; 25a, 25b) is elocated, - a valve (35.1, 35.3), which can move between an open position and a closed position, is connected upstream of the first filter stage or of the vacuum separators (15; 15a, 15b) belonging to the first filter stage, and an additional valve (35.2, 35.4), which can move between an open position and a closed position, is connected downstream of the at least one or the at least two filters (25; 25a, 25b) of the second filter stage, and - the valves (35.1 to 35.8) can be operated by means of a drive, in that the cleaning device can be operated by means of the same drive or a separate drive (91, 89), and in that a control device is provided whereby the drive (89, 91) can be operated depending on pressures in line portions, for which purpose pressure sensors are provided in the line portions preferably between the first and second filter stage (F1, F2) and in the line portions upstream of the vacuum pumps.