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Paper doesn’t blush tells us the proverb. Its manufacturing process is thus not meant, as the production of many thousand sorts of paper is a very demanding process. Progressing Cavity Pumps from KNOLL can here be found in different places, for example directly on the paper machine (for coating color) or in the coating kitchen (for various chemical additives).

It’s the characteristics and product features of this pump that speak for its use in the pulp and paper industry:

Low Pulsation: Absolutely smooth transportation is given and even under fluctuating medium temperatures the characteristic curve remains constant. A precise metering of media of all kinds, which can also be highly viscous or abrasive, is guaranteed.

Large capacity: Capacities with flow rates of up to 200,000 liters per hour are possible with the (so far) largest model of the MX series, the MX100.

Minimum space requirements: With its stator built in EvenWall-technology MX-pumps need only little space and can therefor be used even even under difficult conditions.

Suitable for high pressures: Both, the rotor-stator unit, as well as the very robust cardan joint can easily work under high pressure. Progressive Cavity Pumps from KNOLL are generally delivered with a bearing block, so that axial and radial forces are not transmitted to the gearbox. As a result of this the gears are fail-save protected.

In practice you will find MX-pumps from KNOLL for example in the promotion of paper pulp, mostly in its hopper version. The latter allows to pump media such as pulp, which can be of little or no more free-flowing substance.

But you will also find the MX in the coating kitchen where different chemical additives need to be precisely metered and transported. In its special chemical design the MX-pump promotes calcium carbonate, fillers of all kinds, glues, latex, starch, coating color and titanium dioxide. In addition such media may be hot as for example coating color, or highly abrasive, environmentally harmful and dangerous. Performance and reliability of the pump are not affected by this.

Another advantage of the MX-pump is its spacious sealing chamber in which various sealing arrangements can be fitted, following many different needs and circumstances. Depending on the medium KNOLL can offer double acting mechanical seals for blocking pressure (in closed systems) or as a pressureless quench for cooling or lubrication of the sealing surfaces.

Overall progressing cavity pumps from KNOLL support the pulp and paper industry in its most cost sensitive factor: the use of materials (material consumption) to produce. Fast transportation even under high pressure, exact metering and very short holding time (for maintenance) contribute to achieve a cost-optimized production of paper.