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Slides assume the main job of generating the vacuum – more than 30,000 hours of durability were achieved using a new material

Whether slide bearings, sliders or mechanical seals – all these components are exposed to high loads on a daily basis and, therefore, wear out. With innovative materials, however, maintenance intervals and the service life of pumps and seals can be extended considerably, as evidenced by developments in carbon materials.

Selecting the right material determines the service life of machines, units, and systems. Conventional materials often reach their load capacity limits, especially in pumps and mechanical seals. Schunk Carbon Technology develops and produces materials for seal rings, slide bearings, and pump components made of carbon and silicon carbide. These innovative materials particularly excel in the areas of abrasion resistance, sliding capability, media resistance, and temperature resistance. Carbon in the form of graphite also has the characteristic property of self-lubrication. All in all, exactly the features required in demanding industrial environments. “In practice, their use leads to a significant increase in service life and extended service intervals,” says Thomas Kräuter, Sales Director of the Mechanical Carbon Industry at Schunk. It is not enough to simply replace a material; many years of expertise are required. Three current development projects demonstrate the path from material to functioning components, leading to new materials that considerably extend the service life of pumps, seals and the like.

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The patented design of the so-called ‘Dissolution’ ball valve offers optimized distribution of forces and loads in the ball valve, so that they only occur where they are actually needed. This means that the ball valve made by AS-Schneider can be actuated easily even under high pressures up to 420 bar.

The forces needed to maintain the tightness between ball seat and valve body are only directed onto the corresponding graphite seal rings (see figure).

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The ever-growing rag content in today’s wastewater means that even the best pumps may not be enough. When it comes to critical pumping stations, pump users may need more. Thanks to the acquisition of JWC Environmental, Sulzer now also offers a comprehensive range of powerful sewage grinders – the Muffin Monster and the Channel Monster.

These machines will be presented on Ifat show in Munich next week together with the pump technology.

Jochen Pelzer

Technical paper by Jochen Pelzer

The coupling of drives with work machines like pumps, fans and compressors is simple – at least at first glance. Because, while for selection of the right coupling knowledge of torque and speed are theoretically sufficient, practice shows that plenty of experience and high-quality products increase availability and reduce service costs.

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Individually produced, made to measure, in very small quantities or as a series – for years Butting from Knesebeck in Germany has been well known as a reliable supplier of special components ready for installation. In the course of time, countless product variations have been developed and manufactured together with the end customer – sometimes in series production.

True to the motto “more than pipes” the longitudinally welded stainless steel pipes from Bunttings in-house production usually serve as primary products for the components ready for installation. Corrosion resistant pipes, manufactured specially for the individual customer order, are used to produce these components. Thus special sizes or particular tolerances can be taken into account, such as production by internal diameter.  As part of prefabrication, laser, welding and forming technology are possible, as are cutting and surface processing by grinding and blasting, and combinations of these. (more…)

The Mouvex Abaque Series peristaltic pumps are now available with FDA and EC 1935/2004 certified hoses. By incorporating these hygienic hoses, these pumps are now suited for the production of food and beverage products that require strict hygienic standards.

The design of Abaque pumps also eliminates product contamination since the pumped product is kept completely in the hose and is not exposed to the moving parts of the pump. Additionally, the smooth operation of these pumps allows them to handle the shear-sensitive products with delicate particles.

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At this year’s Achema, KSB is presenting a new pump monitoring system called KSB Guard. Networked vibration and temperature sensors fitted directly to the pump make availability at plant level transparent. The system ensures that changes in the operating behaviour of the machine are detected at an early stage, and maintenance work can be better planned, without having to be on site with the pump. Unlike previous systems, KSB Guard is ideally suited for retrofitting. The sensor unit is attached to the bearing bracket or the drive lantern of the pump using a magnet and adhesive, and can be mounted during operation, with no need for changes to the machine. A battery unit, which is also supplied, provides self-sufficient power supply.

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The Sure-Flex Plus couplings have new elastomeric sleeves providing higher performance and enhanced durability due to significant improvements in proprietary EPDM and Neoprene materials. Development testing confirmed that the new EPDM and Neoprene rubber sleeves enable a 30 % increase in the torque rating when compared to the previous generation sleeves. Sure-Flex Plus couplings provide torsional flexibility, while the 4-way flexing action absorbs virtually all types of

• shock,
• vibration,
• misalignment and
• end float.

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The German micro-pump manufacturer HNP Mikrosysteme is introducing the mzr-Touch Control as a new possibility to control micro annular gear pumps (mzr-pumps) via a graphical user interface. The multilingual graphical user interface supplements the present control of mzr-dosing pumps via laptop or PC. The mzr-Touch Control is compatible to most mzr-pump sizes and series with low to medium power drives. This compact device controls one pump each and is easy and intuitive to handle. Dosage volumes from 0.25 µl and flow rate ranges of 1 µl/min to 288 ml/min can be indicated by the user. This system will be presented at Analytica 2018 in Munich, Hall 1, booth 409.

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