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UDC 628.12:699.81
DAGILEV M. A.
Modular Fire-Fighting Pumping Station
Summary
The modular fire-fighting pumping station produced by the Ecoline Ltd. is presented. The station is intended for lifting and pumping of sea water for the purpose of provision of the required flow rate at the fire.
Key words:
modular pumping station , well pump , manometer , stop valves
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UDC 628.112
DOI 10.35776/VST.2025.06.05
Kosteuk Aleksandr
Reliability of borehole pumping units: causes of failure and methods of their elimination
Summary
The most common causes of borehole pump failures and methods for eliminating them both at the stage of pump selection and during operation are considered. A significant number of pump failures are associated with incorrect selection of pumps for operating conditions, in particular, selecting pumps with characteristics that do not meet the system requirements resulting in the pump operating beyond the operating range. Examples of the most common errors in pump selection and their consequences are given. Monitoring the pump operating mode, in particular, monitoring the position of the operating point relative to the operating range provides for identifying the problem. Pump parameters are monitored both by direct methods by measuring the parameters, and indirectly. If the pump operating point is beyond the operating range, taking corrective actions aimed at remediating the situation is required. Following the proposed recommendations will help the staff operating pumping equipment to analyze the causes of borehole pump failures and develop corrective measures.
Key words
reliability , well pump , pump characteristic , pump operating range , pump control
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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
Summary
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.
Key words
power saving , well pump , impeller , domestic water supply , electric motor
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UDC 628.17.001.4
Kosteuk Aleksandr, Tverdokhleb I. B.
Power Saving Operation of Borehole Pumps ЭЦВ
Summary
It is told about selection of the most efficient method of regulation of pump units equipped with borehole pumps ЭЦВ. The use of a frequency electric drive, as a rule, is inefficient, because of the large static component and small dynamic component of the total pressure created by pumps. Cascade regulation is recommended for this type of units.
Key words:
well pump , power consumption , pipelines , static pressure , supply , operating point , cascade regulation
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