Electric pump unit of ECV type – is the centrifugal borehole submersible machine intended for lifting water from wells, having the total mineral content (dry residue) not more than 1500 mg/l with the hydrogen index (рН) from 6,5 to 9,5, temperature up to 298 К (25 °С), weight ratio of solid mechanical impurities not more than 0,01 %, with chloride content not more than 350 mg/l, sulfates – not more than 500 mg/l, hydrogen sulfide – not more than 1,5 mg/l.
The said pump unit may be used for industrial and agricultural water supply, irrigation and ground-water level lowering.
Pump unit is related to the items of general industrial purpose, aspect 1, repairable ones as per GOST 27.003.
Climatic version: U* GOST 15150.
Pump unit is not intended for servicing in explosion-and-fire hazardous premises.
Pump unit may be completed with electric motors of DAP or PEDV series. When the unit comes complete with PEDV series electric motor it has the following conventional designation - 2ECV.
The unit consists of a centrifugal pump and an electric motor.
The pump is executed as a multistage pump. The stages are interconnected by ties of steel tape or by studs. The shaft together with the impellers and bushings make up the rotor, which is supported in rubber-metal bearings.
Electric motor - is the three-phase asynchronous motor with short-circuited rotor, submersible, with synchronous speed of 50 s-1 (3000 rpm). The electric motor is cooled with pumped water. The sense of rotor rotation: right-handed (clockwise rotation), if viewed from the pump end.
The unit may be vertically or horizontally positioned (under the agreement with Manufacturing plant). When the unit is vertically installed the loads from the pipeline to discharge nozzle are absent.
Horizontal assembly involves special supports for the unit under minimum water level (min 0,5 m). It is recommended to fit the cooling housing onto the pump as an addition. Eliminate loads from the pipeline onto the discharge nozzle. (For example, fix the pipeline on the adequate supports just near the unit).
|Flow (nomin.), m³/h||25|
For example 2ECV 8-25-100 TU 26-06-1659-92, where: