Archive for the ‘Pump Drives’ Category

Couplings in Pump Applications

Friday, January 26th, 2018 von admin

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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Efficiency comparison pumping system

Thursday, January 25th, 2018 von admin

An increasing number of pumps are now being run using speed control in order to be able to define the dynamic volume flow. The pump’s quadratic characteristic causes the motor load to decrease rapidly at lower speeds, which results in the level of efficiency decreasing significantly. Using the diagrams, it can be seen that the ideal workload for the existing asynchronous motor is not reached, due to operation at partial loads (approx. 30%) and speeds (75%).

If the pump is then equipped with a PMSM motor that has an extended efficiency range including partial load operation, the level of efficiency can be increased by approx. 12% in this example and savings of more than EUR 250 per pump per year can be achieved (depending on the number of hours‘ operation per year).

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Sulzer doubles capacity of high voltage testing to improve repair times

Thursday, January 11th, 2018 von admin

Performance testing of high voltage motors and generators is usually carried out to determine benchmark data following a major repair. However, increasingly, customers are requiring this information as part of a problem diagnosis or to verify performance figures for a component when its essential data has been lost. To keep up with growing demand, Sulzer has made a major investment at its Falkirk Service Center (Scotland) that will enable the test-bed load capacity to be doubled.

Until now, the Falkirk site has used a 1,250 kVA diesel generator that operates through two step-up transformers to provide 3.3 – 11 kV via high voltage switchgear to the test cell. This setup ensures a reliable power source for testing that is not affected by local demand on the power grid. The new investment will add a 2,000 kVA and a 700 kVA generator to the site that will be synchronized through a 4000A LV switchboard, as well as a new 2,500 kVA transformer, that will double the capacity of the test bed.

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KSB: High-efficiency motor with integrated frequency inverter

Wednesday, December 20th, 2017 von admin

Prototype demonstrates potentia: The KSB Group has finished the prototype of a super-compact high-efficiency motor with an integrated frequency inverter. The 22-kW synchronous reluctance motor is a prototype featuring new semiconductor technology that provides completely new cooling management for eliminating heat from power electronics.

By integrating the frequency inverter into the motor, developers were able to reduce the unit volume by over 25 percent compared with the traditional design.

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Monitor your pump online – at any time, at any place

Friday, December 8th, 2017 von admin

Fig. 1

The generation of maintainers who check the condition of pumps on a daily basis by listening and touching the equipment is dying out. Nevertheless, pumps must operate reliably. To solve this problem, BestSens has developed the Bearing Monitoring System, BeMoS for short (Figure 1).

BeMoS monitors roller bearings in machinery and plants from the very first second of operation. What is so special about it is the underlying technology:

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Extensive additions to Siemens pump converter

Monday, November 27th, 2017 von admin
The Sinamics G120 is the universal drive to address the widest range of application requirements such as pump drives. Siemens is extending its portfolio of Sinamics G120 converters to include a new frame size, the FSG with voltage ranges from 380 to 480 volts (V) and from 500 to 690 V.
This addition means that the innovative PM240-2 Power Modules now cover the entire power range up to 250 kilowatts (kW). The extremely compact design and standard integrated optional features such as integrated DC link reactor or integrated filter to achieve category C2, enable substantial space and cost savings in the control cabinet.

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Technical Paper: API-all-steel coupling with optimised performance

Friday, November 24th, 2017 von admin

Marc Egelwisse

In the Arpex all-steel multi-disk coupling the Flender GmbH, a 100 %-held Siemens subsidiary, is marketing a coupling that has proved itself over many years. Marc Egelwisse, product manager for Arpex couplings, and his team have further developed this series with a focus on three aspects:

  • increase in the specific power,
  • optimisation of the areas of application and
  • reduction of complexity of the type series.

The results show it was worth it:

  • 70 to 100 % higher torque,
  • 40 % greater angular misalignment,
  • 10 % higher maximum speed and
  • 14 instead of the 42 design variants existing hitherto.

“Because of the high torque capacity and the optimised speed and bore capacity of the new N-Arpex we are confident that we are offering what is at present the world’s best-performing coupling”, says Egelwisse.

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Inspection software for explosion-protected plants – paperless, seamless

Thursday, November 23rd, 2017 von admin

PEC-EX is the latest software module the company R. Stahl introduces exclusively for the plant managers working in the explosion-protected plants. The primary objective of this solution is to optimise the planning execution and documentation of the inspections and tests conducted periodically in a plant.

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Sulzer in Glasgow Sets the Standard in Maintenance and Repairs

Wednesday, November 22nd, 2017 von admin

Increasing pressure to reduce costs and optimise performance is causing many industries to reassess the way in which they tackle maintenance issues. Sulzer’s Glasgow facility has been quick to expand the capabilities and expertise of its staff to ensure additional benefits for customers and help meet these demands.

Scott Tyre took on the Glasgow service centre manager’s role in early 2017, after joining Sulzer as Contracts Manager in June 2016. He comments: “The Glasgow Service Centre is continuously improving to keep pace with its customers’ demands and the staff pride themselves in delivering the best possible technical service. Our challenge is to provide expert engineering support along with concise customer communication and dialogue, 100% of the time.”

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John Crane: Metallic membrane coupling

Tuesday, November 21st, 2017 von admin

The Metastream T Series are metallic membrane couplings acc. API 610 and API 671 for pump drives

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