Maag – Thermoplast Extrusion Pumps
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
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
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
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
Brand
MAAG 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.
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