Gear pumps for the chemical industry

The chemical 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, food 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 industry for years. We always aim to offer our customers the maximum degree of process reliability with our precision gear pumps and, in doing so, comprehensive quality...

CHEM best practice Sealing technology: CHEM series chemical pumps come as standard with stainless-steel components, or there are special versions with coated or ceramic materials. The CHEM series was developed for easy maintenance. Separate pump covers make quick inspection of the interior possible from both sides of the pump. To adjust the axial clearance we use spacers that can be varied depending on the process parameters. Eight different seal versions for different applications Stainless-steel housing as standard. Lots of special materials such as ceramic or coatings are possible. There are...

Product overview The WITTE chemical range, the CHEM series CHEM series chemical pumps are predominately used as metering or transfer pumps. Different designs are available based on the requirements and application. Every day brings something new. The chemical industry is constantly changing. Continuous research and development in this sector creates a constant flow of new products, materials and possibilities. The wide range of applications, processes and materials is ever growing. And new processes are always placing high demands on people and machinery. For over 35 years, we have successfully...

Standard chemical pump CHEMICALS PHARMACEUTICALS AND COSMETICS POLYMERS The CHEM gear pump series was specially developed for the requirements of the chemical industry. This series is used to pump and transfer low-to-medium viscous media and takes care of metering and transfer tasks. The versatile spectrum of use for these pumps ranges from organic and inorganic chemicals and foodgrade lubricants to polymers and pharmaceutical products. An extensive modular system provides optimal material pairings for corrosive or abrasive media. Technical designs Operating parameters Stainless steel · tantalum...

Chemical pump for fine metering CHEMICALS PHARMACEUTICALS AND COSMETICS POLYMERS The Mini series is based on the CHEM series and extends the range with pumps for extremely fine metering tasks. Amounts from 0.2 cm3/rev. to 2.95 cm3/rev. can be pumped. This pump type excels at maximum metering precision. The pumps are used for metering additives into extruders, among other applications. Technical designs Operating parameters Stainless steel · tantalum · titanium · Hastelloy® 1.4112, and also all other processable ceramic and metal materials, such as 1.4571, Ferralium®, Ferro-Titanit®, Hastelloy®,...

Custom/OEM solutions CHEMICALS PHARMACEUTICALS AND COSMETICS POLYMERS WITTE offers modified chemical pumps for OEM customers. These pumps are usually specially tailored to the customer’s requirements. WITTE works with the customer to analyse the pumping task and draw up an initial solution. A pump is designed and prototype created depending on the required amount. The customer has ample op- portunity to test this prototype, and then the results are discussed and optimised together. The pumps can also be fitted with the customer’s name plate if desired and delivered quickly by order contract....

Metering systems/technology CHEMICALS PHARMACEUTICALS AND COSMETICS POLYMERS Gear pumps are highly suitable for precise volumetric metering with high reproducibility. When used in combination with a mass flow meter and a control system, a self-regulating, absolutely precise pumping unit is created. A wide range of interfaces can be used to program the mass flow meter. Once defined, the mass flow meter instantly forwards even the smallest changes in flow to the connected drive unit and regulates the volumetric flow so that it always stays within the tolerance range. Sample structure of a metering...

specific flow rate (cm3⁄rev.) *1 The pumped amount depends on the product being pumped and the operating conditions. *2 Only available as custom solution Speed limit for bearings of tool steel Speed limit for bearings of carbon or ceramic volume flow rate (l/min) PUMP SIZE Diagram is valid for suction pressure of 1 bar abs Pump sizes for standard CHEM gear pumps Size/pumped amount/dimensions CHEM dimensions PUMP SIZE Portfolio brochure for WITTE gear pumps for CHEMICALS

Seals Synchronous magnetic coupling Radial shaft seal ring PRESSURE SUCTION SIDE VISCOSITY (mPas) Each rotating pump has a drive shaft that must be sealed somehow. A wide range of systems and seals can be used for this purpose. Different systems are used depending on the pump type and application area. The selection of seal types is determined by the process parameters. Pressure, temperature and viscosity are crucial factors that affect or limit the seal selection. PRESSURE SUCTION SIDE VISCOSITY (mPas) Single mechanical seal (ED) Vacuum mechanical seal (AD), buffered without pressure Double...

CHEM magnet (magnetic coupling) CHEMICALS Special situations call for special solutions. Our magnetic coupling is safe, reliable and flexible to use. The result: No wear, maximum life expectancy and increased operational safety. Magnets: We offer a wide range of versions of this seal type. The seal is a combination of a hermetic seal at the pump and a touchless drive. In contrast to conventional magnetic couplings, our version has a separate rotor bearing that transfers only the torque to the drive shaft. There is therefore no additional load on the pump bearings by the weight of the internal...