The WITTE Pumps & Technology
GmbH stands for efficient and extraordinary pump solutions and has been one of
the leading pump manufacturers in the field of precision gear pumps since
company founding in 1984. WITTE manufactures standard and special pumps for
the chemical, pharmaceutical, food and plastics industry, as well as in the
areas of offshore and marine engineering.
We always strive for new and more efficient developments to provide you with the best possible service. Therefore, we wish to inform you on our pages detailed about our products, developments, services, news and all other areas of our company.
The demands on plants, processes and equipment are constantly increasing. So to live up to the demand for greater efficiency, higher throughput and lower reject rates, Maag Witte GmbH has completely overhauled its entire range of polymer pumps. In a bid to achieve more throughput, gentler handling and greater energy efficiency, the pumps in both the BOOSTER and POLY ranges have been entirely reworked.
The result is a redesign that impacts on all core components: friction bearings, housings and gear shafts have all been modified. From a technical perspective, this has meant real advantages in terms of conveying properties and product qualities thanks to the reduced heat input, lower shear and shorter dwell times of the polymer in the smelting reactor. What’s more, the optimised gear shafts and modified housing geometry facilitate significantly higher throughputs than with pumps of the same footprint in the previous design. This in turn allows for increases of up to 40% without changing the installation size.Advantages:
All sizes and flange geometries are available with connections that comply with EN 1092-1 and ANSI B16.5. It goes without saying that the company also offers housing variants for replacing existing pumps and debottlenecking, not to mention solutions for special requirements based on customer requests. By standardising on three gear widths for each centre distance, the distances between the respective pump sizes have been significantly reduced. This means it is now easier than ever to select the best possible – and therefore most cost-effective – pump size for each application.Advantages:
The technical revision ensures, on the one hand, lower stress on the bearings and thus a lower bearing temperature and, on the other hand, significantly improved volumetric efficiency. Shear and temperature stress on the polymer are thus significantly reduced and product quality increased.
Wear on core components such as friction bearings and gear shafts is reduced to a minimum.Advantages:
Melt pumps for extrusion
The extrusion gear pump is mainly used in connection with extruders or kneaders. They lower the naturally existing pulsation and uneven transportation, particularly of single-screw extruders. The extrusion pump is also used as a melt pump. It takes over the establishment of the required transport pressure, which is needed for the downstream equipment.
Efficient pressure build-up
In the gear pump, the pressure build-up occur significantly more efficiently than in the extruder itself. The extruder is relieved through the use of an extrusion pump. Significantly less energy or heat is added to the polymer. The melt pump thereby contributes to the gentlest possible transportation. The ExtruCore® pump is indispensable for the production of precise foils or micro-granulate.
Robust and flexible
The robust design and wear-resistant materials make the ExtruCore® indispensable for extrusion. It can also be used to transport natural rubber and soft PVC through different special designs.
The WITTE fast-changing color design is perfect for master batch applications with frequently changing colors.
The WITTE Quick Color Change (QCC) is perfect for master batch applications with frequently changing colors. This extrusion melt pump is equipped with two regulating screws and a separate product flange. The regulating screws allow for a color or product change during running operation. The position of the screws influences the direction of the lubricant flow. This can either be guided back into the main flow or out of the pump through a separate product flange. This prevents contaminated material from the previous application from entering the new product flow.
ChemCore® gear pump to transport and dose low to medium viscous media.
The application range reaches from classic transfer and dosing tasks in the chemical and pharmaceutical industries to the transportation of monomers, oligomers and prepolymers during polymer production. Through decades of construction experience and optimal material selections, these chemical pumps are suitable for even the most difficult of tasks and maintain their reliability and dosing accuracy in vacuum and high pressure applications. Typical areas of application for this pump type can be found in the chemicals, cosmetics, food industries, petrochemicals and polymer industries.
WITTE chemical pumps from the ChemCore® series can be operated horizontally, vertically and also as submersible pumps lowered in medium.
We offer broad expertise in the field of gear pumps and are therefore the ideal partner when it comes to replacing your old Hermetic LZ gear pumps. Hermetic has discontinued this series, although a large number of pumps are still in active operation. However, this is no reason for you as a customer to worry. WITTE offers exact replicas for easy replacement. We supply you with the complete pump including coupling connection with identical dimensions. This is a double advantage for our customers, because the system does not have to be extensively rebuilt and the core components come from the established WITTE modular system.
The usual high availability of spare parts is thus also ensured for these pumps at all times. Furthermore, it is also possible to upgrade the pumps by using other materials from our portfolio. This may be necessary if requirements have changed over time or the performance of the pump is not optimal.
This saves money and time. We guarantee maximum service life and accuracy of fit for the ChemCore® LZ. On request, however, we can also equip your plant with the chemical pumps of the WITTE ChemCore® series. Just as you wish.
Conventional gear pumps have a limited range of applications due to their design. There are applications that cannot be realized at all or only with considerable modifications and costs. These include the low-pulsation delivery of low-viscosity fluids against high differential pressures in a wide temperature range. Until now, this was only possible to a limited extent with gear pumps. This is because the low viscosity combined with high differential pressures harbors a major risk: Although the medium flows quickly into the friction bearing, a sufficient lubricant film is not formed there, which quickly leads to contact between the journal and the bearing. The use of special materials can compensate for this to a certain extent.A challenge to our taste
Our goal: customized gear pumps with maximum process reliability. Creating solutions that no one else offers is what excites us and drives us. With our focus on innovation, technology and quality, we have succeeded in expanding the range of applications for gear pumps and improving the technology in key areas.
Metering pumps are used in different sectors. For example, in fiber production. Synthetic chemical fibers are gaining importance. They are required for many different applications such as textiles, linens, brushes, etc. WITTE dosing pumps ensure that the polymer melt in the process is transported evenly and reliably to the corresponding locations in the process. A constant flow rate is very important to ensure consistent quality.
Media with very low viscosities can be safely and precisely transported in other applications as well. High efficiency and a long life expectancy characterize this series of pumps.
Stainless steel gear pumps to transport and dose low to middle viscous media.
Through decades of construction experience and optimal material selections, this pump type is suitable for even the most difficult of tasks and maintains its reliability and dosing accuracy in vacuum and high pressure applications.
Typical areas of application for this pump type can be found in the chemicals, cosmetics and food industries to transport, for example, margarine or vegetable oils. This pump type can be heated (hydraulically or electrically) as well as unheated. The modular WITTE construction kit for friction bearings, gears and axial shaft seals offer the highest degree of flexibility for users. The pump has different rinse connections for better cleaning. A design with little dead space was considered during the construction; a completely dead space free design is not possible due to the construction.
The magnetic coupling is equal to contact-free drive and seal. Magnetic coupling pumps are used if critical media has to be transported. The seal ensures that the pumps work 100% securely and without leaking. The magnetic coupling is particularly ideal for hazardous substances that should not escape into the enviroment.
The coupling is hermetically sealed and can be designed with different sensors for monitoring and in different variations and materials. A magnetic coupling is used in combination with a chemical pump by default.
From now on, MAAG WITTE also offers the suitable control for its pumps. Together with Blue Automation, a specialist for automation technology, the WITTE Core Command control was developed. This type of control is specially designed for use with WITTE gear pumps, but can also be used with pumps from other manufacturers.
Replacement parts for gear pumps
Replacement parts for WITTE pumps are made according to the highest quality standards. A comprehensive quality control of the core components such as the bearings, shafts and casings ensures the required high quality of the components. The parts are inspected for the size accuracy and compliance with tolerances using the most up to date technologies, systems and procedures. Only the parts that correspond exactly to the production tolerances are also installed or offered.
Pressure sensors deliver information about the pressure conditions in the pump and the process. The pressure can be regulated correspondingly should there be fluctuations.
Temperature sensors can be used at different positions to monitor the temperature of the medium. The sensors monitor the process and provide information about the temperature of the pump and the additional heat input through friction, for example.