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Maag - Polymer Production Pumps

Good volumetric efficiency enables pumping at slower speed, reduced shear rate, lower temperature, and tight dwell time distribution. Improving these attributes results in better pumping rate, higher polymer quality, greater reliability, and longer service life. At the same time, energy consumption is significantly reduced. MAAG melt pumps and extrusion pumps adhere to that principle.

In the plastics manufacturing chemical industry, the pump geometry has a considerable influence on the degassing stage, where minimal filling levels in the tank directly connected to the gear pump lead to a shorter dwell time. This is especially interesting for manufacturers of easily degradable polymers because it means volatile compounds can be minimized. The x6 class gear pump in particular achieves an extremely low NPSHr (net positive suction head required) pressure value, and so can process polymer melts of up to 200,000 Pas (0 shear viscosity), depending on pump size.

The operating pressure of the gear pump has a major influence on product quality in extrusion. The higher the pressure, the finer the filters and screen changers that can be used downstream of the pump. High volumetric efficiency and low pulsation ensure consistent polymer quality and uniform output of the end product.

Available models

Technical specifications
Rotational speed (U/Min)
max. 85
Torque (Nm)
max. 1625000
Differential pressure (bar)
max. 320
Viscosity (MPas)
20000000
Temperature (°C)
Up to 350
Throughput rate (kg/h)
max. 120
Pump size
3 – 100
Output (l/Min)
max. 1650
Housing
Steinless steel | Carbon steel
Gear shafts
Nitrided steel Tool steel

Processes in the manufacture of polyolefins require high-pressure gear pumps which build up pressure for the units after the compounder. The new performance driven geometry of polyrex® x⁶ class results in high throughput rates at high flow rates and low shear stress. polyrex⁶ can convey low viscosity polymers where earlier pump generations failed. Thanks to increased pump performance, the specific conveying capacity is 50% higher compared to same housing size pumps of older generations. For debottlenecking existing plants, MAAG offers alternative housing designs with matching interfaces to older pump generations.

Key features

  • Processing of highly diverse polymer melts with wide viscosity range
  • Optimized fl ow channels and full heating
  • Gentle treatment of polymer melts thanks to special gear teeth with low crushing power
  • High overall efficiency, minimized friction thanks to pioneering gear and bearing technology
  • Low pulsation pumping even at high differential pressures
  • High durability and service life
  • Reduced wear on screw housings and extruders
Technical specifications
Rotational speed (U/Min)
760
Differential pressure (bar)
160
Viscosity (MPas)
60
Temperature (°C)
350
Throughput rate (kg/h)
32000
Pump size
56 – 180
Output (l/Min)
550
Housing
Stainless steel
Gear shafts
Nitrided steel | tool steel

Polymer processes and polymer applications require polymer transfer pumps which will constantly and reliably feed oligomers and prepolymers through the system. The liquid polymer pump design is highly suitable for low viscosity. Thanks to thermorex® TRP and TRO, reactors no longer have to be pressurized. The good efficiency and long service life increase the efficiency of your production plant with polymer transfer pumps from MAAG.

Key features

  • Excellent fill behaviour due to optimized inlet geometries
  • Optimized flow channels
  • Completely heated
  • High overall efficiency, minimized friction thanks to pioneering gear and bearing technology
  • Low pulsation pumping even at high differential pressures
  • Compact design
Technical specifications
Rotational speed (U/Min)
max. 100
Torque (Nm)
max. 600000
Differential pressure (bar)
max. 320
Viscosity (MPas)
max. 20000
Temperature (°C)
350
Throughput rate (kg/h)
max. 55
Pump size
100 – 380
Output (l/Min)
max. 900
Housing
Alloy- / Carbon Steel - other materials on request
Gear shafts
Nitrided steel / tool steel

Polymer processes require booster pumps and polymer metering pumps that gently process both high and low viscosity plastic melt through the polymer processing system.

Specially designed low-compression teeth allow the thermorex® transfer, booster or metering gear pumps of the x⁶ class to achieve both high pressure and low shear. The plastic melt is conveyed with a constant, precise flow even at high discharge pressures — also for low viscosity products like prepolymers, where previous polymer pump generations reached their limits in industrial applications. Additionally, their high efficiency and long service life will enhance the capacity of any given production plant.

Technical specifications
Rotational speed (U/Min)
max. 150
Differential pressure (bar)
– 320
Viscosity (MPas)
max. 20000
Temperature (°C)
max. 350
Throughput rate (kg/h)
max. 170 t/h
Pump size
100 – 560
Output (l/Min)
max. 2700
Housing
Alloy-/Carbon Steel -other material on request
Gear shafts
Nitrided steel / tool steel

MAAG introduces the vacorex® x⁶ class polymer extraction gear pump. vacorex⁶ ideally fulfills modern polymer production processes which require polymer pumps that can discharge at high pressure despite very low fill level and high vacuum conditions in the reactor/devolatilization vessel.

MAAG vacorex⁶ polymer extraction pumps process a wide range of different polymer grades without affecting their quality. Reliable, requiring little maintenance, and robust enough to withstand the rigors of years of operation, the vacorex⁶ polymer gear pump is the ideal solution for such applications.

Technical specifications
Rotational speed (U/Min)
max. 100
Torque (Nm)
max. 409600
Differential pressure (bar)
max. 70
Viscosity (MPas)
max. 20000
Temperature (°C)
max. 350
Throughput rate (kg/h)
max. 36
Pump size
10 – 21
Output (l/Min)
max. 600
Housing
Cast steel / corrosion resistant steel
Gear shafts
Nitrided steel

Polymer processes in the polymer industry require units that gently discharge low and high-viscosity plastic melts from reactors and degassing equipment. The MAAG polymer extraction pump systems and viscorex® transfer gear pumps feature the excellent fill behaviour and short residence times that make them the ideal solution for such polymer applications. Their high efficiency and long service life will enhance the capacity and availability of your polymer production line. viscorex® transfer gear pumps efficiently convey plastic melts with a constant, precise flow.

Key features

  • Excellent fill behaviour due to optimized inlet geometries
  • Optimized flow channels
  • Gentle treatment of polymer melts thanks to special gear teeth with low squeezing power
  • High overall efficiency and hence minimized friction thanks to
  • pioneering gear and bearing technology
  • Low pulsation pumping even at high differential pressures
  • Compact design

vacorex x6 class advantages

MaagMAAG Pump Systems, Automatik Plastics Machinery, Gala Industries, Reduction Engineering Scheer and Ettlinger – five successful and well experienced companies have joined forces to become the global partner for the polymer industry. As manufacturer of gear pumps, pelletizing and filtration systems and also pulverizers we offer top-grade equipment for your demanding requirements – not only for polymer applications, but also for the chemical, petrochemical, pharmaceutical and food industry.
[Polymer Production Pumps, Pump]