Hydraulics for Vortex Pumps T The vortex impeller is an «open» impeller whereby power transfer to the fluid being transported is comparable to the principle of a hydraulic coupling. Egger, the pioneer in vortex impellers, has rigorously optimized their special hydraulic properties to today’s industry needs. Various impeller variations have resulted from this, offering optimal conditions for each application. Insensitivity to abrasion – gentle pumping As a result of the Turo® System, the major proportion (85  ) of the fluid % being pumped is transported directly from the primary vortex to the pressure connection. Only 15  of the fluid % being pumped comes in contact with the impeller through the secondary vortex. Sealing gaps which could wear during solids handling and cause grinding effects are not present in our construction. That reduces the abrasive attack to a minimum and sensitive structures in the material to be conveyed such as crystals, bacterial flakes or algae remain largely unaffected. Any potential wear on the impeller always develops symmetrically; therefore the balance and thus the quiet running of the pump remain assured. The output will only drop significantly with an almost completely abraded impeller. Higher, longer-lasting efficiency through optimal flow geometries One component of the Turo® System is the patented axial spiral in the casing. It means, Egger specially applies coordinated casing geometries to the vortex impeller. This optimal interaction between impeller and casing confers to Egger Turo® Pumps the high discharge heads and efficiency uniquely achievable by vortex impeller pumps. Because of their insensitivity to wear, efficiency levels are sustained, even over long periods of time. Great freedom from clogging by particles and fibers – open spherical channel This feature is achieved by the completely recessed impeller. Solid objects up to the diameter of the pressure outlet and long fibrous materials do not cause any malfunctions. There are no the shaft, regardless of whether the pump is used for minimal, optimal or maximal production volumes – a further advantage compared to closed impeller shapes. Together with the highly balanced nature of the impeller, this guarantees quiet operation of the pump. Non-clogging, safe delivery rate due to the recessed impeller and a patented axial spiral Totally recessed impeller channels that the solids have to pass through nor are there any radial gaps between the pressure and suctions sides that could be clogged by fibers and otherwise obstruct the pump. Quiet operation from the minimum to the maximum output Turo® vortex impellers transfer only minimal, near-constant radial forces to Patented axial spiral Impeller variations The Turo® TA impeller is suitable for pumping municipal raw wastewater with high proportions of textiles, who tend to clog. It is hydraulically optimized for this requirement and fully integrated into our Turo® Vortex pump’s modular system. Headquarter Emile Egger & Cie SA Route de Neuchâtel 36 2088 Cressier NE (Switzerland) Phone +41 (0)32 758 71 11 Fax +41 (0)32 757 22 90 [email protected] Offices and representatives countries USA Italy Belgium Netherland China Austria Germany Sweden France Spain Great Britain Switzerland India Further information can be found on

Hydraulics for process pumps EO / EOS The semi-open radial impeller with special profile is a logical development of the original Egger impeller, which brought about the founding of the firm in 1947. The EO and EOS impeller family is distinguished most significantly by their number of blades; their hydraulic properties are virtually identical. Transport of fluids with high gas content - high suction capability Ordinary radial impellers are known for their limited transport of gas content which results in a drastic reduction of output to the point where delivery stops altogether. Since its founding...