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UDC 628.292.003.13

Bazhenov V. I.

Customer benefit from the practical application of «7 = 2» initiative


The method of selecting pumping equipment by Life Cycle Cost (LCC) criterion – total cost of ownership is presented. The software that provides for calculating LCC criterion depending on the pump output is placed at www.7-2.su Web site. Submersible pumps are selected as a LCC calculation object because of their wide use at the sewage pumping stations under construction or subject to upgrade.

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UDC 628.112.24:621.671

Shchavelev A. S., Zakharov V. A., Nikitin V. I.

Deep-well pumping units at the Velizhany water treatment facilities of Tumen


Centrifugal submersible pumps are designed for installation in deep wells, open pits and different reservoirs. The pumps ensure high pressure of the pumped clean water with a small sand concentration. Deep-well pumps are widely used both for domestic and industrial purposes (e. g. for automatic water supply, garden irrigation, in firefighting systems etc.). Deep-well pumping units have been used at the Tumen Vodokanal facilities from the beginning of 1980-ies in response to the need of deep underground water abstraction. The story of establishing the production of APVM and ETSV deep-well pumping units at the premises of the mechanical repair department of «Tumen Vodokanal» LLC is described. The problems related to their production and operation are designated. The succeeding introduction of advanced energy efficient equipment manufactured by Wilo German company and SAER Italian company is considered, the results of their operation are presented. Replacing ETSV pumping units with Wilo and SAER energy efficient pumps provided for reducing the energy intensity at the water intake facilities of the Velizhany water treatment plant by 23.8%. The results of pilot operation of Ciris CRS10-65/3 deep-well pumping unit manufactured by Livnynasos OJSC at one of the Tumen water intakes are summarized. The operation of deep-well pumping units made of high quality anticorrosive materials allowed three-fold reduction of repairs and hence significantly decrease of the operation and maintenance expenditures at the intake pum­ping station of the Velizhany water treatment facilities.

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UDC 628.292

Redit M.

Power Saving Pumps for Wastewater Pimping


Recommendations for selection of pumps for wastewater pumping and maintenance of an optimal balance between power saving and minimal risk of clogging are made.

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