Gear Pumps for the Polymer Industry

Maag transfers its experience of extrusion technology to high-performance gear pumps for the polymer industry, offering the vacorex (discharge pumps) and thermorex (transfer pumps) series with immediate effect in performance classes GP, HV, and HP for the manufacture of polymers. The new versions have been designed in response to specific requirements in terms of throughput and pressure increases. As the pioneer in pumping technology, Maag is once again delivering maximum availability over a broad sphere of operation and spectrum of performance. High reliability, global support, and tailor-made solutions for the customer’s polymer manufacturing application are the focal hallmarks of the new developments from the experts from Oberglatt.

For vacorex discharge gear pumps, assemblies are needed in polymer processes that are able to extract low- and high-viscosity plastic melts gently from reactors and degassing systems. The production process takes place directly below the reactor. A constant and precise filling behaviour, coupled with short standing times, predestines this series for use in the polymer industry. High-level efficiency and long service life increase the overall efficiency and availability of the production plant. This series comprises sizes 45 to 560.

Thermorex transfer gear pumps focus on the gentle conveying of carrier media of varying viscosities for polymer processes. A special gearing with a low squeeze factor is one design feature that makes the thermorex transfer, booster, or metering gear pump ideal for polymer processes. High degree of efficiency with constant and precise transport—even at high outlet pressures—is also guaranteed with this series. Pumps are integrated as transfer or booster models into the transfer pipe (“in-line”) or directly onto the mixer, kneader, or extruder. This series comprises series sizes 45 to 360.

Vacorex and thermorex series gear pumps in general boast performance features that are hard to beat. One really striking feature is the new-generation compact construction. The insides of the two new series, however, are equally impressive: optimised inlet geometries ensure excellent filling properties. The design of the flow channels has been optimised to encourage flow. The carrier materials can be heated continuously to up to 350℃in order to influence their viscosity. This yields viscosities of up to 20,000 Pa. A special gearing system with extremely low squeeze effects allows polymer melts to be handled gently. The shaft seals, gear, and bearing technology from Maag ensure minimum friction and guarantee an excellent level of efficiency. The two series offer low-pulsation transport even at high differential pressures.

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