Patent ID: 6666457
Filing Date: 2003-12-23
Classification: B01D,B01L,F16L

Abstract:
A sealing device for sealing a cavity (40) that can be rotated around a rotational axis (A), comprising:at least two sealing areas arranged one after another and separated from each other by at least one intermediate zone (Z1 to Z3); two sealing faces (20, 21 to 24, 30, 31 to 33, 41, 71 to 74) within each of the at least two sealing areas, continuously extending around the rotational axis and slidingly movable over each other upon rotation of the cavity (40), and at least one connection (B1 to B3) for discharging, fluids out of the at least one intermediate zone for creating a negative pressure therein for reducing leakage from the cavity.