Innovative Pump Designs Combine Energy Efficiency and Serviceability

Related Vendors

EDL Anlagenbau Gesellschaft mbH

Italvacuum, Srl

Angst+Pfister AG

NETZSCH Pumpen & Systeme GmbH

Alternatives to Composite Material

Another goal is recyclability of the materials used in the machines. New stator technology developed by Netzsch for progressing cavity pumps conserves increasingly scarce resources by reducing energy and material consumption. In addition, some of the components are re-usable.

On conventional designs, the elastomer is vulcanized onto an aluminum or steel housing, making it necessary to dispose of the entire part. A different approach is taken on the Atex-certified iFD-Stator 2.0. The elastomer is produced as a separate part which is not bonded to the housing. Its polygon shape along with axial tension keep it firmly in place. If the elastomer shows signs of wear and has to be replaced, it is not necessary to replace the iFD jacket. There is no rubber-metal composite part which requires complex, expensive disposal. This saves money and resources and reduces the environmental impact.

Reducing Torque and Maintenance Requirements

On previous designs, the rubber part lost much of its flexibility because it is permanently attached to the housing. This increases the breakaway and operating torque and the pumps require more energy, so the drive has to have a higher power rating. With the iFD-Stator 2.0, separation of the elastomer and the jacket reduces the start-up torque because the stator can give way by a defined amount. Smaller drives can be used and energy consumption is lower compared to conventional stators.

The elastomer’s axial freedom of movement reduces wear because the elastomer can give way when foreign matter passes through. Downtime is reduced and maintenance intervals are longer. The stator normally pays for itself during the first maintenance interval. The cost savings on spare parts continually increase over the entire lifecycle...

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