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       A centrifugal electric pump unit of ECV type for wells is intended for feeding water with general mineral content (solid residue) within 1500 mg/l, with pH ranging 6,5 to 9,5, the temperatures up to 25° C and with hard mechanical impurities below 0.01% by mass, the chloride content - not more than 350 mg/l, sulfate content - not more than 500 mg/l, hydrogen sulfide - not more than 1,5 mg/l.
       They are used for urban, industrial and agricultural water supply and irrigation as well as for the ground-water lowering .
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