Abstract: A device for centrically charging tanks (9) with a spin chamber (1, 10) connected to an inlet (20) and to a vertical downpipe (2, 12) ending seamlessly in a trumpet-shaped mouth (3, 18). Rotary flow charges circular settlement tanks and sand sorters and sedimentation tanks in such a way that the Coanda effect is activated at the trumpet-shaped mouth (3, 18) and in turn causes the rotary outflow of fluid from the vertical pipe (2, 12) to be diverted into the horizontal plane or vertically upwards as well as a radially symmetrical flow in the tank (9). There is a guiding pipe (14, 16) in the downpipe (2, 12) with preferably circular apertures around its periphery and which is open to the atmosphere at the top.

Abstract: The invention relates to an apparatus for central charging of circular tanks with sewage water by means of a vertical pipe and is distinguished by a centrally inserted horizontal circular control disc in the region of the transition from the vertical pipe to a smoothly continuously adjoining bell shaped component or body widening smoothly from a smaller diameter to a larger diameter and having a surface configuration substantially similar to the bell end of a trumpet or similar type of horn. The bell shaped component is attached or connected at the smaller diameter end to an end of the vertical pipe which end is configured to mate with the smaller diameter end of the bell shaped component. The outer periphery of the control disc and the inner surface of the vertical pipe, in the transition region defined to be the region where the bell shaped component connects with an end of the vertical pipe, forms an annular gap.