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[September 2006]
Pumping Pastes, Pulps and Sludges Successfully
Pumping pastes, sludges and other 'challenging' liquids which contain a high proportion of solids can present unique problems for pumps. For example, de-watered sludge, carbon sludge, bleached earth, pastes and purees etc are notoriously difficult liquids to transfer reliably and economically.
Progressing cavity pumps are often recognised as the type and design of pump best suited to handling these challenging liquids, so the Wangen range of progressing cavity pumps, now available through Michael Smith Engineers (Woking, Surrey), are claimed by the company to be the ideal solution for these difficult applications.
These compact pumps are available close coupled for duties up to 55m3/hr at pressures up to 24 bar, while versions with bearing pedestals are suitable for duties up to 400m3/hr at pressures to 48 bar. The extensive Wangen range includes horizontal and vertical models, hopper feed versions for viscous media with hygienic construction designs also available for food processing applications. Customised pumps can also be supplied to suit specific application requirements.
In addition to providing reliable pumping of viscous media, the pumps are suitable for handling abrasive materials and also offer safe pumping of shear sensitive liquids. Other benefits include virtually pulse-free pumping, good metering characteristics, continuous displacement, low NPSH requirements and they are self-priming.
The high quality, robust and reliable design is said to ensure low life cycle cost and they are simple to maintain on-site, resulting in reduced spare parts inventories.
www.mse-pumps.co.uk
ENDS