The AT-Design

The next step in evolution of polymer pumps.

The next step in evolution of polymer pumps.

The demands on plants, processes and equipment are constantly increasing. So to live up to the demand for greater efficiency, higher throughput and lower reject rates, Maag Witte GmbH has completely overhauled its entire range of polymer pumps. In a bid to achieve more throughput, gentler handling and greater energy efficiency, the pumps in both the BOOSTER and POLY ranges have been entirely reworked.

The reworked gear pump series

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POLY-AT

The result is a redesign that impacts on all core components: friction bearings, housings and gear shafts have all been modified. From a technical perspective, this has meant real advantages in terms of conveying properties and product qualities thanks to the reduced heat input, lower shear and shorter dwell times of the polymer in the smelting reactor. What’s more, the optimised gear shafts and modified housing geometry facilitate significantly higher throughputs than with pumps of the same footprint in the previous design. This in turn allows for increases of up to 40% without changing the installation size.

Advantages:

  • Lower bearing temperature, leading to lower stress on the polymer
  • Optimised inlet geometry, leading to minimal pressure loss and therefore minimal dwell times of the polymer in the reactor
  • Three different flange types each (EN 1092-1 or ANSI B16.5)
  • Three different pressure versions (200 bar, 250 bar, 320 bar)
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BOOSTER-AT

All sizes and flange geometries are available with connections that comply with EN 1092-1 and ANSI B16.5. It goes without saying that the company also offers housing variants for replacing existing pumps and debottlenecking, not to mention solutions for special requirements based on customer requests. By standardising on three gear widths for each centre distance, the distances between the respective pump sizes have been significantly reduced. This means it is now easier than ever to select the best possible – and therefore most cost-effective – pump size for each application.

Advantages:

  • Lower bearing temperature, leading to lower stress on the polymer
  • Increased safety against shaft breakage due to overload
  • Simplified spare part management thanks to the use of identical components for all series
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ExtruCore AT

The technical revision ensures, on the one hand, lower stress on the bearings and thus a lower bearing temperature and, on the other hand, significantly improved volumetric efficiency. Shear and temperature stress on the polymer are thus significantly reduced and product quality increased.


Wear on core components such as friction bearings and gear shafts is reduced to a minimum.

Vorteile:

  • Lower bearing temperature, thus less stress on the polymer
  • Minimized wear
  • Various materials available for bearings, shafts and housings
  • Optional terminal box for cartridge heaters
  • Increase in throughput for pumps with the same center distance
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Parts of redesign