Dual-flow centrifugal pump

A double-flow centrifugal pump for delivering a flow rate in a range from 500 m3/h to 4000 m3/h, the pump positioned in a vertical orientation, and having a pump housing and a dual-flow impeller rotationally fixedly arranged on a rotationally driven shaft, with which impeller a fluid can be suctioned drawn from two axial sides from a negative pressure area and delivered in the radial direction into a positive pressure area,

• wherein the negative pressure area is sealed off with respect to the positive pressure area by at least two axially spaced sealing gaps formed between the impeller and at least one stationary pump component, the at least one stationary pump component comprising at least one of the pump housing and a stationary insert, and
• wherein the shaft is mounted only on one side, and the sealing gaps comprise as axial gaps extending in the circumferential direction as well as in the radial direction and arranged axially between the impeller and the at least one stationary pump component, the gap width of which is less than the radial distance of the impeller to all components that are arranged at a radial distance to the impeller.