Two pieces of equipment:
In certain applications when pumping a suspended solids slurry, agitation is required to keep these solids uniformly in suspension, to stop them from settling out on the bottom of the tank, and to ensure a consistent pumped product. This is generally overcome with a separate mechanical agitator/mixer that is in addition to the pump, therefore two pieces of equipment are used.
One piece of equipment:
This unique submersible agitation pump simultaneously agitates whilst pumping, from one piece of equipment. This is achieved with two separate Impellers, one for pumping and one for agitation. Each is contained in its chamber, connected to one shaft that is driven by an electric motor. The pumping head of the pump, housing the two impellers, sits on the bottom of the tank, with the motor up out above the slurry that is connected to the pumping head with a column that has the rotating drive shaft inside.
The slurry is drawn up into the pumping chamber by the centrifugal Impeller and is expelled out through the outlet port to line. Simultaneously, the centrifugal mixing impeller, mounted above the pumping impeller, draws the slurry down into the mixing chamber, uniformly @ 360°, and jets it out, again uniformly @ 360°, through the four outlet ports.
Mixing:
The agitation pattern is a uniform, vertical rolling action, not a stir, that is achieved by the slurry being drawn down at the centre, bottom (approx. 200mm up), and jetted out at high speed horizontally just below that point. The displacement of the drawn-down slurry naturally pulls up the jetted product, which gives this rolling action throughout the tank’s contents.
These pumps are not only used to maintain a slurry in suspension but will also bring settled out solids back up into suspension and agitates sufficiently to be used to prepare a mixture from various liquid and dry products.
Fit for purpose:
Made from 316 cast stainless steel, these agitator pumps are robust, non-corrosive, have excellent wear properties, and are designed to equally agitate and pump smooth slurries as well as aggressive, abrasive ones. Working on a Centrifugal principle, viscous and thick slurries are not recommended.
The bottom bearing and seal are oil flooded for lubrication and cooling, enabling them to be run 24/7, pump to a dead end, and run empty.
Closed Impeller:
For pumping efficiency and service life, the pumping impeller is a closed type, meaning it has its own contained cavity rather than open types, that have the stationary inlet plate as one of the cavities sides. Also, the inlet on both the stationary inlet plate and impeller inlet is fitted with ceramic rings, which eliminates wear issues in this vulnerable area to maintain peak performance.
Applications:
The standard pump is designed to be in a tank where the liquid level doesn’t exceed 1.2m and for optimum agitation in most applications is not recommended to exceed 3.0m in diameter.
Three sizes in the range cover most applications: 4.0; 5.5 & 7.5kW, producing: 2.0; 2.7 & 3.4 Bar pumping pressure and can pump & agitate slurries with a dry matter up-to 27%. and a particle size up to 5mm.
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