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MAAG extrusion pumps and melt pumps offer long service life. Even lower bearing temperatures of the x6 class melt pump generation – thanks to the high efficiency of the pump – extend it even further, and provide for an even more stable lubricating film between the shaft and bearing. That makes the pumps extremely reliable.

The optimal solution for discharge from reactors is an important aspect in polymer production. The key in this is the difference between extraction from containers in production processes entailing standard requirements for the NPSH value (such as PET) and other processes where the required filling level in the connected container must be minimized. MAAG offers different housing designs for extraction melt pumps to meet the different requirements, so as always to be able to realize an economical and technically optimal solution.

The increased torque load capacity of MAAG gear pumps (melt pumps) boosts safety during start-up and operation, and aids general safety in production.

Available models

MAAG extrex® PFS pump
Technical specifications
extrex® 20GP
extrex® 21GP
extrex® 22GP
extrex® 28GP
extrex® 36GP
Specific Volume (cm 3/U)
1,3
2,8
4,7
10.2
25,6
Differential Pressure Δp
max. 250 bar
max. 250 bar
max. 250 bar
max. 250 bar
max. 250 bar
Temperature range
30° to 200°C
30° to 200°C
30° to 200°C
30° to 200°C
30° to 200°C
Viscosity
to 30.000 Pas
to 30.000 Pas
to 30.000 Pas
to 30.000 Pas
to 30.000 Pas

The extrex® PFS gear pumps are specially designed for applications in the pharmaceutical and food industries. Such applications require specific design characteristics: high discharge pressure capability, constant throughput, gentle conveying, and narrow temperature ranges. In such an environment, the proven extrex® gear pumps unfold their full potential.

Key features

  • Precise metered flow of product ensures consistent pellet size and quality
  • Screw pressure pulsations are eliminated or minimized even at high differential pressures
  • Efficient increase in discharge pressure while relieving extruder of build-up pressures
  • Lower specific energy for the overall system
  • Improved quality of the finished product due to lower overall melt temperature
  • Essential for the production of micro-pellets
  • Compatible with all extruders and reactor vessels
MAAG extrex® RV/RB pump
Technical specifications
Differential pressure [bar]
max. 120
Viscosity [MPas]
Up to 30000000
Temperature [°C]
Up to 130
Throughput rate [kg/h]
extrex⁶ RV: 15 - 1500 | extrex⁶ RB: 50 - 1000
Pump size
extrex⁶ RV: 36 - 110 | extrex⁶ RB: 56 - 110
Housing
Alloy steel
Gear shafts
Nitrided tool steel, prepared for shaft cooling

When it comes to manufacturing profiles and dealing with strainers, high requirements are placed on pumping consistency and extrusion lines. The new gear pump series extrex⁶ RV/RB from MAAG raises the performance of gear pumps for elastomer extrusion to new levels in terms of both economy and processing technology. Product quality is guaranteed by a stable discharge, the lowest tolerance deviations and achieving process stability in quick time.

Key features

  • Optimized flow channels
  • Highly efficient self-cleaning properties
  • Low pulsation pumping even at high differential pressures
  • Compact design
  • Gentle pressure increases
  • Minimal temperature increase
  • Leak-free operation depending on compound sensitivity possible
MAAG extrex⁶ ER pump
Technical specifications
Viscosity (MPas)
Up to 3000000
Temperature (°C)
Up to 120
Housing
Alloy-/Carbon Steel -other material on request
Gear shafts
Tool steel, special coatings
Bearing
Tool steel / special materials
Shaft seal
Viscoseal, Viscoseal temperature controlled
Pump heating
Thermal water or oil
Shaft heating
Thermal water or oil

Elastomeric processing requires positive displacement devices that gentle convey high viscosity rubber through the system. Specifically designed, low compression tooth design allow the extrex⁶ ER transfer, booster or metering gear pump to achieve both high pressure and low shear.
The rubber compound is conveyed with a constant, precise flow even at high discharge pressures – and this also for extremely dry or sticky compounds, where former pump generations reached their limits due to scorch. Additionally, their anyway high effi ciency and long life span will extend unrivaled due to reduced internal friction.

Key features

  • Endurance Shaft Improved load capability to raise your differential pressure
  • Augmented Torque High torque to extend your differential pressure range
  • Thermal Mastery Efficient temperature management to enhance your process security
  • Dynamic Lubrication Increased impurity tolerance to secure your uptime
  • Balanced Bearings Unique self-centering shafts to maximize your process stability
Technical specifications
Rotational speed [U/Min]
max. 220
Differential pressure [bar]
max. 320
Viscosity [MPas]
max. 30000
Temperature [°C]
Up to 350
Throughput rate [kg/h]
max. 16000
Pump size
25/25 – 160/200
Housing
Alloy steel
Gear shafts
Tool steel
Shaft seal
Alloy steel
Pump heating
Electric/liquid

Processing thermoplastic polymers requires positive displacement devices that gently convey any kind of thermoplastic grades from high to low viscosity through the pump system. The specially designed, low-compression tooth design allows the extrex® transfer, booster, or metering gear pump of the x⁶ class to achieve both high pressure and low shear.

Key features

  • Streamlined Linearity Elimination of incoming pulsations to maximize your product uniformity
  • Protected Polymer Minimized back-flow volume to speed up your polymer change
  • Endurance Shaft Improved load capability to raise your differential pressure
  • Peak Rate Superior flow capacity to boost your productivity
  • Balanced Bearings
  • Unique self-centering shafts To maximize your process stability
Technical specifications
Rotational speed (U/Min)
max. 200
Torque (Nm)
max. 12800
Differential pressure (bar)
max. 500
Viscosity (MPas)
Up to 3000000
Temperature (°C)
Up to 350
Throughput rate (kg/h)
4500
Pump size
36/22 – 160/90
Housing
Alloyed steel
Gear shafts
Tool steel

MAAG gear pumps guarantee constant conveying in extrusion lines and thus highest product quality. With its robust construction, the new extrex®-x6 MP high-pressure gear pump enables operation in pressure ranges up to 700 bar which is the upper limit for conventional gear pumps. The advanced extrex®-x6 MP completes MAAG’s product range of the gear pumps and prepossesses the ever-increasing demand for high pressure pumps for application in extrusion lines with the usual qualitity.

Key features

  • Operation in the high-pressure range up to 700 bar
  • High overall level of efficiency due to cutting-edge gear and slide bearing technology
  • Flexible use due to simple retro-fitting
  • Robust and compact construction
  • Low-pulsation conveying even at high-pressure differentials
Technical specifications
Viscosity (MPas)
Up to 30000000
Temperature (°C)
Up to 350
Housing
Alloy steel
Pump heating
Electric / fluid

The extrex⁶ Y-Adaptor unites two extrex x⁶ class gear pumps to ensure optimum efficiency and cost-effectiveness in extrusion systems. The extrex⁶ Y-Adaptor can be used with an extruder to feed two different die packs with a separate, constant melt stream each. Separate discharges from the individual gear wheel pairs are guaranteed thanks to the design and can be adjusted by changing the speed of the individually controlled drives. The extrex x⁶ class gear pump portfolio allows customers to choose between different thrust pieces to suit their application.

Key features

  • Simplified system design for manufacturing multi-layered films with a variable layer structure
  • Improved discharge consistency when multiple nozzle heads are used in profile systems
  • Wider, more flexible range of applications
  • Short dwell times
  • Compact design
  • Excellent self-cleaning properties

extrex 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.
[Thermoplast Extrusion Pumps, Pump]