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The volute casing pump is the most common type of centrifugal pump. Its characteristic feature is the volute-shaped pump casing which is typical for single-stage centrifugal pumps. There are designs whose main dimensions are standardised in accordance with EN 733, ISO 2858 and ISO 5199, but this standardisation still leaves ample room for many design variants. The volute casing pump is usually a single-stage design, but sometimes incorporates two stages. Both single-suction and double-suction variants are common. Impellers can be of either radial or mixed flow type, as defined by the specific speeds of approx. 12 to 70 rpm (in individual cases up to 100 rpm and higher).
Volute casing pump for horizontal installation, back pull-out design, single-stage, with ratings and dimensions to EN 733, radially split volute casing with integrally cast pump feet, replaceable casing wear rings, closed radial impeller with multiply curved vanes, single mechanical seal to EN 12756, double mechanical seal to EN 12756, drive-end bearings: rolling element bearings, pump-end bearings: plain bearings, with magnetless KSB SuPremE motor (exception: motor sizes 0.55 kW / 0.75 kW with 1500 rpm are designed with permanent magnets) of efficiency class IE4/IE5 and PumpDrive variable speed system; ATEX-compliant version available.
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