Method of operating a vacuum system with varying pressure

摘要

Process for operating vacuum installations comprises introducing a gas into casings before flooding the vacuum chamber (V) so that dust and particles are blown out, and preventing penetration of the dust and particles into the casings. Preferred Features: The casings consist of hollow rolls or roll sections (12) containing roller bearings and inner rings. The gas is blown through the annular gaps between the inner rings and outer rings. The gas amount is regulated.