Technical paper by Susanne Suttrop

Committed to their slogan – Coppenrath & Wiese – Where else can you get quality like this? –  the company has earned a reputation in the field of frozen desserts that has been solidly anchored in the consciousness of consumers for more than 40 years (Fig. 1). But a slogan alone is not enough to satisfy customers if not simultaneously associated with reliably high quality products. That is why the company insists not only on high quality, fresh ingredients and skilled, talented employees but advanced production processes as well.

With a daily production volume of 3.3 million rolls as well as more than 200,000 various tortes, failure of even one component can lead to significant financial losses. For this reason, the company’s expectations for high-quality production systems are just as high as the expectations of consumers for outstanding products.

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The new C-Series pumps have been specifically developed by Almatec to be a cost-effective alternative. The housing parts are tightened to each other via housing bolts. All of the C-Series’ bolts are tightened together against a diaphragm-sized ring on each side of the pump.

This design distributes the forces of the housing bolts onto the housing parts evenly, providing a consistent flow of forces that increases bolt torque and improves pump safety.

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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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A German energy supplier had initially used a geological horizon for gas storage, but then decided to extract crude oil from the same deposit. Therefore, a suitable extraction system had to be acquired for transporting the multi-phase mixture with a high gas content to the surface from 1,200 m below. Due to the extreme conditions, a special pump technology was required:

Netzsch developed a progressing cavity pump system with submersible drive. As all moving parts are positioned deep down in the well, there is also no risk of environmental impact from leaks at the surface. (more…)

Pumping of extremely abrasive media, e.g. mixtures of iron ore and water, poses major challenges to mine operators all over the world. In order to improve lifetime and increase MTBF (Mean Time Between Failure) values, reliable and well-proven technological concepts are required, especially in terms of wearing part resistance. The Mulitsafe double hose-diaphragm pump offers a proven technology for these highly abrasive applications. The only real wearing parts of this pump are the suction and discharge valves. To guarantee continuous improvement of the already high valve lifetime, a special test rig has been installed at the Feluwa works in Mürlenbach/Germany. Daniel Nägel and Philipp Werhan are describing, how this test rig (Fig. 1 – with pump type TGK 250 3 DS 35, performance data: Q = 14 m³/h, p = 130 bar(g) ) allows testing of customer-specific media under real conditions.

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The use of elbow pumps is always indicated when large flow rates are to be pumped to low heads. This requires a propeller-like impeller with both axial inlet and outlet, which guides the out warding flow into a pipe bend. This geometry then allows the introduction of a long projecting pump shaft in the pipe bend up to the impeller. The bearing of the pump shaft takes place outside the pumping chamber and must be generously dimensioned in the axial direction. The adjustment of the delivery head is usually done with a belt drive between the pump shaft and motor. The new ROPP model – showcased at Achema 2018 – of the Germany based pump manufacturer Wernert is also based on this classic pump concept, but with a few additional technical features that should be of interest to the experts and pump users in the chemical industries:

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At Achema 2018 Aro introduced the new EXP Series three-inch non-metallic, air-operated diaphragm pump for chemical and water processing applications.

These pumps can transfer up to 20,000 liters of fluid in 30 minutes. That equates to a 47 percent increase in flow compared to the Aro two-inch pump, and a flow rate of up to 270 gallons per minute.

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www.starpumpalliance.com a new selection portal for the pump users. The Star Pump Alliance has set itself the goal to assist professional users of pumps in selecting pump technology tailored to fit their specific applications. “Our portal offers extensive information about pump technologies as well as a tool for the individual selection of pumps with access to the product portfolios of different brands. This selector proposes to website visitors one or several suitable pump technologies for each specific application on the basis of the application characteristics the users have entered”, Kai Stegemann, General Manager of Star Pump Alliance GmbH.

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Side Channel Pumps are self-priming pumps that operate in low NPSH conditions & have the ability to handle up to 50% entrained gas. These pumps run at very low flow rates, while generating medium to high differential pressures.

Side Channel Pump specialist, Sero PumpSystems, will showcase these capabilities and the operation of multifunction pumps with their Mini Pump Lab (Fig.) at 2018 Achema  trade show in Frankfurt. Sero will demonstrate an affordable, easy and effective control of side channel pumps utilizing “Industrie 4.0”, as well as duty point monitoring within the pump’s performance range.

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