A SEPARATION DEVICE

摘要

In a separation device for separating particles from a liquid, which is present in a container (1), a centrifugal rotor (7) is rotatable around a vertical rotational axis (R). The centrifugal rotor (7) has a tubular inlet member (8), which extends down into liquid to be treated and which upon rotation of the centrifugal rotor forms a pumping member adapted to pump liquid upwardly and into the centrifugal rotor. According to the invention the rotatable inlet member (8) is surrounded by a non-rotatable wall (12), a sealing device being adapted to seal between the rotatable inlet member (8) and the non-rotatable wall (12). Thereby is avoided that liquid is pumped upwardly on the outside of the inlet member. Furthermore, a smallest possible part of the outside of the inlet member (8) can be in contact with liquid, independent of the level of the liquid surface in the container (1).