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 in approach flow applications and systems. 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.