regenerative turbine pump
Suitable for small flow rates and high discharge pressures
Regenerative turbine pumps are centrifugal pumps for pumping pure liquids. They are used where great delivery heads are required with small volume flows. Furthermore, by contrast with other centrifugal pumps, regenerative turbine pumps are capable of also handling large gas proportions without interrupting the liquid stream.
With regenerative turbine pumps, which have to be assigned to centrifugal pumps, energy transmission to the pumped liquid takes place in the impeller and the surrounding side-channel. Due to centrifugal forces, the pumped liquid circulates several times out of the side-channel back into the impeller. That way, energy transmission is increased and large delivery heads can be achieved despite a small construction size. The general functional principle is similar to the one of side-channel pumps. The difference is that the side-channel of a regenerative turbine pump also stretches along the end face of the impeller.
Regenerative turbine pumps often have more than 20 shovels which are arranged in a star shape on both sides of a support disc.
Technical features of a regenerative turbine pump
- compact design
- great delivery heads for small capacities
- self-priming, dependent of type
- high gas handling capability without interruption of the rate of flow
- stable production of microbubbles for handling liquid-gas mixtures
- direct gas addition according to VDMA24430 is possible
- on account of small gap clearances, not suitable for polluted liquids
- linearly falling characteristic curve with increasing rate of flow
- little axial thrust
range of applications of a regenerative turbine pump
Regenerative turbine pumps are used where great delivery heads with small capacities and pumps with small dimensions are required. They are suitable for pure, non-abrasive or polluted pumped liquids.
Regenerative turbine pumps are used, for instance, in car wash installations, to increase pressure in water networks, in the chemical industry or in mechanical engineering for cooling, recirculation and as small boiler feed pump.
Besides, they are used for enrichment and mixture of liquids with gases. Main application fields in the multiphase range are biofuel plans, dissolved air flotation DAF, neutralisation, drinking water treatment, bioreactors, crude oil water separation on oil rigs and oilfields as well as general process technology.
Benefits of a regenerative turbine pump
In case of proportionate outgassing of the medium or short-term air entry, peripheral pumps can operate without the flow rate tearing off. In addition, very large gas proportions can be permanently co-conveyed. They are particularly suitable with multiphase applications with low volume flows.
Delivery characteristics of a regenerative turbine pump
- Working range: Q= 0.5 - 15 m³/h
- Maximum delivery head: 107 m (50 Hz); 145 m (60 Hz)
- PBU: 80°C to 140°C
- PBM: up to 200°C
- Working pressure:
- PBU / PBM: max. 16 bar
- Viscosity: up to 1E-3 Pas
- Gas content: up to 15%
- Ambient temperature: -20°C up to 40°C