Multi-Phase Pumps

Multiphase applications are used when the viscosity or condition of the medium to be conveyed varies over time, i.e., when high-viscosity and low-viscosity media alternate in the conveyance and/ or the states of aggregation, solid, liquid, gaseous, combined with one another are changing over time.

Solids sometimes also pose a challenge; using the appropriate design of the pump, this can easily be implemented in all models up to a solids content of 65%.

‍DAUREX Multi-Phase Pumps

• Are specially developed for pumping media with different densities and states of aggregation.
• We deliver with our proven CoLube Bypass technology as standard.
• Conveys all products gently and with low pulsation, from thin to highly viscous, paste-like media containing solids. Even media with a high gas content, foaming and contaminated media are properly conveyed even at very high or very low temperatures.
• Can be tailored for almost all conveying tasks through individual adaptation.

The materials we use are selected individually for the medium to be conveyed.
The stators and sealing elements used can be manufactured from both solids and elastomers. This enables almost universal use.

The first application is basically a standard pump, designed for pumping changing liquids.

In the second application, the rotor and stator are also emergency lubricated via a bypass with a reserve tank due to the pressure difference between the suction and pressure sides.
The container acts as a liquid reservoir, since the medium is still available for a period of time due to the force of gravity. By changing the container volume, the duration of a possible gas flow can be determined and designed, taking into account the lowest viscosity of the conveying medium in the process.
This version is intended to reliably transport away short-term gas content periods and less expensive compared to the third version.

In the third application, the rotor and stator are then additionally emergency lubricated via the bypass by means of a lubricant pump attached behind a storage container, the container then functions as a reserve tank, since the medium is still present here for a time that can be defined by the container size due to gravity.
The duration of a possible gas flow can then be determined by changing the container volume.
The lubricant pump effects a regulated dosage of the emergency lubrication independent of the currently prevailing viscosity, which means that even longer periods of gas content can be easily removed.