Gear pumps for the extrusion of polymers and thermoplastics

Gear pumps transport a wide variety of media in industrial production processes in general, in the chemical industry as well as in the pharmaceutical and food industries. The matching gear pumps and pump systems can be found in MAAG’s wide range of products by plant manufacturers and producers and processors of plastics.

MAAG gear pumps

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Elastomer Extrusion Pumps Chemical & Industrial Pumps Polymer Production Pumps Thermoplast Extrusion Pumps
MAAG | Chemical transfer gear pump| cinox® therminox®

cinox® therminox®

cinox® therminox® gear pumps are corrosionresistant and heatable stainless steel conveying units that satisfy the stringent quality requirements of today's chemical processing industry. Thanks to the extensive range of components and [...]

Application: Color Batch • Compounding • Extrusion • Extrusion • Fibres and Strings • Hot Melt • Industry • Masterbatch • Pipe • Polymer production • Polymers for Medicine and Food • Wire and Cable Sheathing
Category: Gear Pumps
MAAG | Discharge pump | cinox-V therminox-V

cinox®-V therminox®-V

The pump models cinox®-V therminox®-V are discharge pumps. They have been designed for highly viscous fluids, which are gently extracted from reactors and degassing devices even when the inlet pressure is low, ensuring optimum fill [...]

Application: Antistatics • Biopolymers • Calciumcarbonate • Carbon Fibre • Compounding • Compounding • Cross-linking Agents • Foam Blowing Agents • Glas Fibre • Industry • Lubricants • Natural Fibre • Plasticizers • Polymer production • Polymers for Medicine and Food • Stabilizers • Wollastonite
Category: Gear Pumps
MAAG | Gear pump for pharma/food industry| extrex® PFS

extrex® PFS – 20GP

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 [...]

Application: Pharma & Food
Category: Gear Pumps
MAAG | Extrusion gear pump for rubber extruder | extrex

extrex® RV/RB

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 [...]

Application: Elastomers • Extrusion • Extrusion • Fibres and Strings • Industry • Pipe • Wire and Cable Sheathing
Category: Gear Pumps
MAAG | Extrusion gear pump for polymers | extrex⁶ ER

extrex⁶ ER

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 [...]

Application: Extrusion • Extrusion • Fibres and Strings • Pipe • Polymer production • Polymerherstellung • Wire and Cable Sheathing
Category: Gear Pumps
MAAG | Booster extrusion melt gear pump | extrex⁶ EX

extrex⁶ EX

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 [...]

Application: Antistatics • Calciumcarbonate • Carbon Fibre • Color Batch • Compounding • Compounding • Cross-linking Agents • Extrusion • Extrusion • Fibres and Strings • Foam Blowing Agents • Glas Fibre • Lubricants • Masterbatch • Natural Fibre • Pipe • Plasticizers • Recycling • Stabilizers • Wire and Cable Sheathing • Wollastonite
Category: Gear Pumps
MAAG | High pressure gear pump for polymers | extrex⁶ MP

extrex⁶ MP

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 [...]

Application: Antistatics • Calciumcarbonate • Carbon Fibre • Color Batch • Compounding • Compounding • Cross-linking Agents • Extrusion • Extrusion • Fibres and Strings • Foam Blowing Agents • Glas Fibre • Lubricants • Masterbatch • Natural Fibre • Pelletizer • Pipe • Plasticizers • Pulverizer • Recycling • Stabilizers • Wire and Cable Sheathing • Wollastonite
Category: Gear Pumps
MAAG | Twin outlet gear pump for complex extrusion | extrex⁶ Y-Adaptor

extrex⁶ Y-Adaptor

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, [...]

Application:
Category: Gear Pumps
MAAG | chemical transfer gear pump| F-Series

F-Series

F-Series chemical transfer gear pumps are corrosion-resistant and heatable stainless steel conveying units that satisfy the stringent quality requirements of today's chemical processing industry. Thanks to the extensive range of components [...]

Application:
Category: Gear Pumps
MAAG | External gear pump | refinex® refitherm®

hydrolub®

Continuously operated equipment calls for reliable components. Whether in lubrication oil applications or in processing plants, a pump is required to work inconspicuously yet reliably. Precisely the environment in which MAAG tried and [...]

Application: Extrusion • Extrusion • Fibres and Strings • Industry • Pipe • Wire and Cable Sheathing
Category: Gear Pumps
MAAG | Pressure increasing polymer pump | polyrex⁶ PR

polyrex⁶ PR

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 [...]

Application: Elastomers • Polymer production • Technical Plastics
Category: Gear Pumps
MAAG | External gear pump | refinex® refitherm®

refinex® refitherm®

Chemical, refinery, and industrial plant applications are challenging. High process pressuresand high temperatures are commonplace in such environments. Precisely the environment in which MAAG tried and established gear pumps develop their [...]

Application: Hot Melt • Industry • Polymer production
Category: Gear Pumps
MAAG | Polymer pump for polymer industry | thermorex

thermorex® TRO/TRP

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 [...]

Application: Biopolymers • Elastomers • Hot Melt • Polymer production • Polymerherstellung • Technical Plastics
Category: Gear Pumps
MAAG | Booster pump and metering pump | thermorex⁶

thermorex⁶ TR/TB/TP

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® [...]

Application: Biopolymers • Elastomers • Hot Melt • Polymer production • Polymerherstellung • Technical Plastics
Category: Gear Pumps
MAAG | Polymer extraction pump | vacorex⁶ VX

vacorex⁶ VX

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 [...]

Application: Biopolymers • Elastomers • Hot Melt • Polymer production • Polymerherstellung • Technical Plastics
Category: Gear Pumps
MAAG | Polymer extraction pump | viscorex VR

viscorex® VR

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 [...]

Application: Elastomers • Hot Melt • Polymer production • Polymerherstellung • Technical Plastics
Category: Gear Pumps

Gear pumps for perfect plastics

Essentially, gear pumps are simple devices which transport plastic melts and other media, along with the empty volume of gear toothing in the pump shaft, in the extrusion process or in the process to manufacture plastics in the chemical industry. They comprise a small number of key components, such as housings, shafts, bearings, and shaft packing. On closer inspection, the simple system is seen to be much more complex. Since MAAG gear pumps usually process polymer melts, the behavior of these long-chain molecules must be understood and taken into account when subjected to the relevant stresses. Reaction to high temperatures and shear rates is of great importance here. The dwell time and the distribution of the dwell time in the melt pump must also be taken into account.

The plastics manufacturing industry needs maximum efficiency in production processes, and demands the lowest possible temperature rise in the bearings and in the polymer melt being processed. Less play between the components quickly improves efficiency. However, this can have a negative effect on product quality and affect the function of the gear pump in the extrusion process. There is a risk that shafts and bearings will seize up.

The research, development and manufacture of gear pumps for extrusion and other fields of application in the production and processing of plastics are part of MAAG’s corporate history. It has built up great knowledge over many decades of cooperation with customers worldwide, which is fully reflected in the x6 class melt pump. Gear pumps for extrusion and plastics production in the chemical industry are used today to pump a wide variety of polymer classes. New knowledge is continually flowing into the development and enhancement of melt pumps.

The ideal gear pump for extrusion of polymers

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.

Gear pumps and extrusion pumps from MAAG

The smaller the pump the better for the customer’s plant planning. MAAG pumps are optimized to use the given installation space to attain maximum plant capacity.

Energy, energy cost and energy consumption are crucial aspects of plant planning. MAAG gear pumps optimize energy consumption.

MAAG pumps can be used for a wide range of polymers. There is a wide variation between high-viscosity and low-viscosity products. The pumping pressure can be increased when processing low-viscosity polymers.

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.