Problem to be solved: to increase the throughput of vacuum deaerators without increasing the size of the equipment.A rotor 30 with a screen rotating inside a vacuum Bessel is disposed.A vacuum deaerator for introducing a liquid processing material into the rotor 30 from inside and passing the screen 3 to make the processed material fine and deaerationScreen 3It has a circular cylindrical shape.In the radial direction of the cylindrical screen 3, there is a perforated perforated plate shape.A plurality of penetrating apertures formed in the inner wall of the screen 3 are formed as inflow aperturesThe opening of the plurality of through portions provided on the outer wall surface of the screen is an outflow openingThe opening area of the inflow aperture isThis is characterized in that it is larger than the opening area of the outflow opening.Diagram
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