pump

摘要

Pump comprises a rotating group having a contour ring (3), a rotor (5) and side plates or walls so that a flood is influenced within the group with pressure-less circulation. Preferred Features: The pressure-less circulation is produced by sliding the blades (7) into the rotor or by preventing retraction of the blades or by lifting the blades from the contour in the separating region. Retraction of the blades is prevented by a slide which is arranged in a pocket in a lifting ring.