IdlTTE^ PUMPS & TECHNOLOGY Gear pumps for the polymer industry

WITTE PUMPS & TECHNOLOGY GmbH is an international medium-sized machine designer and manufacturer based in Tornesch near Hamburg. WITTE specialises in developing and manufacturing precision gear pumps. It has its own subsidiaries in the USA, China, Russia and Malaysia, as well as a number of agents representing it worldwide. Portfolio brochure for Witte gear pumps for the polymer field

WITTE gear pumps for the polymer process The petrochemical industry is one of the most important economic sectors. It is the foundation and engine for new and innovative products and materials. The manufacture of chemical base substances as raw materials for plastic products and chemical products calls for the highest standard of precision and care. WITTE PUMPS & TECHNOLOGY GmbH has been a reliable technological partner to innovation drivers and giants in the chemical and plastics industries for years. We always aim to offer our customers the maximum degree of process reliability with our precision...

Product overview The WITTE polymer pump range: the right pump for every processing stage. Available in standard designs or modified in accordance with customer requirements. Plants and components are subject to extreme requirements in the production and processing of polymers. High temperatures and pressures are required for many processing stages. The quality of the product strongly depends on constant process parameters. Temperature fluctuations, shearing, pulsation or pressure changes negatively impact the quality of the melt. That’s why WITTE has developed a range of pumps that are precisely...

WITTE gear pumps for the polymer process Metering CHEM series Pressure boost Extrusion BOOSTER series EXTRU series Discharge POLY series Chemical pumps for metering additives. Pumps for building up the required process pressure for further processing. Extrusion pumps optimise the extrusion process and relieve the extruder. Product quality is kept consistently high. For discharge from melt reactors. Powerful discharge pumps with enormous output even from high vacuum conditions. Topic Product overview 5

WITTE pumps can be used in a number of applications in the chemical and plastics industry. We've compiled a rough overview of the most common media that can be pumped with WITTE pumps here. Portfolio brochure for Witte gear pumps for the polymer field

Processing stagesUsing gear pumps in the production of polymers The right pump at every point WITTE offers the right pump solution for the entire process chain in the production of polymers. Different pump types are used depending on the requirement and the application. All pumps are tailored to the respective technical conditions of the processing stage in question. From small metering pumps for introducing additives in the production of raw melt and pumps for the production of prepolymers to discharge pumps for discharging the final polymer melt, WITTE is the one-stop shop for the entire process...

Reactor with prepolymer melt - Preliminary product for polymer production Discharge of prepolymer for further processing - Prepolymers, monomers, oligomers Discharge of prepolymer - Prepolymer is transferred from the reactor through prepolymer pumps - Seal: viscoseal with stuffing box Metering of additives to mixer - Metering of additives - Mixing of melt Discharge of polymer melt with POLY pumps - Polymer pumps used as discharge pumps - Discharge from the melt reactor even under vacuum conditions Increase of process pressure to produce end product - Increase of process pressure and transfer...

The CHEM gear pump series was specially developed for the requirements of the polymer industry. The pumps are used to pump and transfer low-to-medium viscous media and are designed as classic metering pumps. The versatile spectrum of use for these pumps ranges from organic and inorganic chemicals and food- grade lubricants to polymers and pharmaceutical products. An extensive modular system provides optimal material pairings for corrosive or abrasive media. 10 Portfolio brochure for Witte gear pumps for the polymer field

Technical designs Operating parameters HOUSING ORGANIC AND INORGANIC CHEMICALS Alcohols • additives • bases • esters • glycerine • resins • hardeners • isocyanates • monomers • oils • phenols • acids • biodiesel • bitumen • tar • hot melt • adhesives • waxes • etc. POLYMERS Cellulose • PA • prepolymers • etc.

The BOOSTER pumps provide the necessary process pressure. Tools, filters or pipes cause the pressure from upstream processing stages to reduce, meaning that it is generally no longer sufficient to reliably transfer highly viscous melt to downstream processes. The BOOSTER series guarantees the reliable flow of product and builds up the necessary pressure for further processing. Hydraulically heated, even temperature-sensitive fluids are reliably pumped. 12 Portfolio brochure for Witte gear pumps for the polymer field

Technical designs Operating parameters HOUSING Application examples POLYMERS PET • PBT • PA • PC • PS • SAN • ABS • HIPS • PP • PE • POM • biopolymers • elastomers • Greater efficiency, resulting in • Lower bearing temperature, leading to lower strain on the - Less temperature transfer to the polymer polymer - Energy saving = cost saving - Broader viscosity range possible • Increased protection against shaft breakage due to overload - Greater volumetric flow range possible thanks to innovative design • Standardisation of components, meaning easier storage and improved availability

Using gear pumps in extrusion brings enormous benefits in terms of the quality of the process and of the end product. By relieving the extruder, maintenance intervals can be extended and downtime minimised. Reduced backflow means increased output. The product is produced with consistent quality, minimising rejections. Pumping fluctuations and pulsation in the product flow are things of the past: they're reliably absorbed by the extrusion pump. The pump also ensures constant pressure ratios and gentle transfer of the melt. The exact volumetric transfer of the pump even means that gravimetric metering...