The Perivac Deaerator is a space‐saving, high‐performance system for efficient removal of entrained and dissolved air as well as other gases from paper, board and tissue stock suspensions. An optimally deaerated stock is the basis for high quality paper, board and tissue production as well as machine efficiency. This compact unit is known for its reliable operation and low power consumption and can either be installed as a new system or as a complement to an existing installation.