Hose pumps in the paper industry
Hose pumps in the paper industry
Even for the demanding pump applications of the paper manufacturing process, the high quality and reliable industrial hose pump series from Verderflex offers individual solutions with reduced maintenance costs and long service life.
Verderflex industrial hose pumps are exceptionally low maintenance and easy to install. They belong to the toughest hose pumps in the world and are versatile in their application in many different industry sectors.
Various applications in the paper industry
A major paper manufacturer uses Verderflex pumps to dose chemicals and paints from mobile tanks into production and mixing tanks. The fluid viscosity is between 20 to 400 mPas, depending on the colour, and a density of 1.12 kg/dm³. The required flow rate of 617 l/h is easily achieved using the Verderflex VF25 pump.
During normal operation the pump may need to run dry, a problem for many other pump systems. Verderflex hose pumps can run dry without any problems, thus providing a real advantage compared to other pumps, as it significantly minimizes maintenance and repair costs (and of course downtime) for the paper manufacturer.
In the course of the process a large amount of waste water is produced that can contain residues (e.g. fibrous substances, fillers and chemicals). For water treatment calcium hydroxide needs to be dosed, which is a typical application for a Verderflex hose pump.
As the fluid tends to clog when only small flow rates are needed, it often causes increased downtime and maintenance for diaphragm pumps and consequently high repair costs. Again the low maintenance Verderflex hose pump is a perfect alternative. When the fluid clogs at the suction side, as can happen easily with this application, the simple reverse action of the rotor is the easy solution to that problem. Due to the high dosing accuracy and the robust, low maintenance construction, the VF25 hose pump has proved itself more than capable in this application.
Despite the differences in the above applications, Verderflex hose pumps are a perfect solution for both cases, proving their flexibility.
How do hose pumps work?
The low shear peristaltic pump action is created by compressing the hose between the shoes of the rotor. The movement of the rotor transports the fluid to the discharge side. In between each pass of a shoe the hose recovers to create a vacuum and draw in fluid.
As the hose is squeezed absolutely tight, there can be no backflow. Therefore, the Verderflex hose pumps are particularly suitable for dosing applications up to 16 bar pressure.
Due to the operating principle of a peristaltic pump, the medium within a hose pump only comes into contact with the hose itself. The consequential advantage is that no other parts of the pump can be affected by the medium and the fluid itself cannot be contaminated inside the pump.
The sealless design allows for the pumps to be used even when crystallizing or other demanding media need to be handled.
Even aggressive fluids, that especially affect the metal parts of other pump systems, can be pumped without any problems with the Verderflex hose pumps.
Verderflex hoses: Superior in design
The important difference between Verderflex and other hose pumps are the hoses themselves. Verderflex hoses come in twelve standard sizes ranging from 5 to 125 mm inner diameter and can also be applied to other hose pumps in the market.
The unique construction of the hoses prevents material fatigue between the rubber layers and the reinforcement, resulting in a significant improvement in hose service life.
This feature makes the Verderflex hose very robust and durable even when handling abrasive fluids, the textile reinforcement allows for pressures up to 16 bar to pumped across the hose range.
Due to the unrivalled precision in the manufacturing process, Verderflex hoses do not need to be machined to have a consistent wall thickness. The Verderflex hose is supplied with a textured surface which actually helps pump performance. Due to the texture of the Verderflex hose, there are microscopic lubricant pockets that improve the uniform lubrication of the hose.
There are five different hose materials to choose from, providing a perfect solution for the individual demands of a variety of applications, including, food and beverage sectors and other applications with high hygiene demands. The EHEDG certified Verderflex NBRF hose are perfect for food, beverage and hygienic operations.
Even highly corrosive fluids, like oxidizing products, can be handled by the Verderflex hose made of CSM (Hypalon®).
As the hose of the pump is the only wearing part, maintenance work is easily and quickly done by a simple hose change. The disaster proof hose connections have been designed to make maintenance work even easier.
Advantages:
• Longer hose life due to minimized fatigue
• Pressures up to 16 bar and flow rates up to 90 m³/h
• Versatile application possibilities for many industries and fluids, even for high hygienic demands or for ATEX environments
• Easy hose connections for fast maintenance
• EHEDG certified
In addition to the described industrial hose pumps, there are product variations that can now serve new applications with new demands:
Success all along the line: The Verderflex series
The Verderflex Dura series is a new generation of innovative smaller hose pumps. They offer a compact and robust design with a very small footprint and at the same time unique dosing abilities. The operating temperature of the pump could be reduced significantly, resulting in a longer service life of the hose and pump.
The Verderflex Scientific laboratory tube pumps are a series of cased pumps in different designs (e.g. casing with IP66 rating). The compact design of the series allows for the pump to be mounted practically everywhere. The Verderflex Scientific range offers various control options via a keypad. Depending on the model, the pump can be controlled manually, with remote control or with programmable parameters.
In the OEM (Original Equipment Manufacture) sector, the Verderflex OEM range is a perfect solution for mounting or incorporating pumps into 3rd party machines that need accurate dosing. Depending on the requirements, a low pulsation, higher flow or various control options can be provided.
The versatility of the Verderflex OEM series allows for the degree of flexibility and customization that OEM customers require.
The attributes of the Verderflex range speak for themselves when it comes to comparing the pumps with competitive products. Verderflex hose and tube pumps convince through their unique and unrivalled performance.
Application areas from A to Z are made possible with the various models and possibilities that these pumps offer: from agriculture to paper and pulp to water treatment, everything is possible with the Verderflex range.
You can find more information on our hose and tube pumps on our website www.verderflex.com!
Story provided by VERDER Deutschland GmbH
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