Compact and compatible
EXTRU III pumps are of compact design and impress through their extraordinary compatibility. Their light construction and compact design allow simple installation, thus saving time and valuable fl oor space.
The EXTRU III can be operated with viscosities of up to 30.000 Pas., temperatures of 350°C, suction pressures of up to 120 bar and differential pressures of up to 250 bar. The standard EXTRU III pump is delivered with aluminium-bronze Viscoseals. This dynamic shaft seal is designed especially for high viscosities and suction pressures and can be provided with cooling if required.
Because of the effi cient build-up of pressure in comparison to extruders, the product can be conveyed in a very gentle manner with the WITTE EXTRU III gear pump, as comparatively little energy or heat is transferred to the polymer. They allow an extremely precise and almost pulsation-free conveyance of polymer, so that fl uctuations in conveyance by the extruder will be compensated for. The friction bearings are provided with special lubrication pockets and channels to ensure long-term, reliable operation.
Housing: Heat resistant carbon steel
Cover: Carbon steel
Gears: Nitrited tool steel,
optional: coating, herringbone gearing
Friction Bearings: Tool steel,
Shaft Seal: Viscoseal, Aluminium-Bronze,
optional: cooling element
Heating Systems: Electrically, by means of heating cartridges
Polymers: PS, PET, PC, PA, PMMA, HDPE, LDPE, LLDPE, PP, Polysulfone, PEEK, etc.
From 22/22 (4,7 cm3/rev) up to 180/180 (3.200 cm3/rev)
Viscosity: Up to 30.000 Pas
Temperature: Up to 350 °C (662 °F)
Suction Pressure: Up to max. 120 bar (1.740 psig)
Differental Pressure: Up to max. 250 bar (3.626 psig)
The values listed are maximum values and must not coincide under certain circumstances.
We will be pleased to offer you special materials and differing designs upon request.