The AT-Design

The next evolutionary step for polymer pumps.

The next evolutionary step 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, Witte Pumps & Technology 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


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.


  • 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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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.


  • 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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Parts of redesign