Hot water submersible pump specifications precision selection

1, hot water submersible pump flow and head changes directly affect the use of economic and operational reliability
    Different specifications of the hot water submersible pump has a different range of use. Any of a hot water submersible pump on the nameplate of the flow and head is the use of this submersible pump rated point, generally the hot water submersible pump is the best point to use high efficiency. Users in the use of submersible pumps in the process, when the hot water submersible pump output flow and head changes, the hot water submersible pump efficiency and motor output shaft power also changes accordingly, which directly affect the motor stator winding heat and Temperature rise. And thus the use of hot water submersible pumps and the reliability of the economy will have a greater impact.
2, hot water submersible pump a reasonable range of use
    With the hot water submersible pump configuration of the pump structure of the different types of submersible pumps have different characteristics. For centrifugal pumps or Francis pumps, the shaft power required for the pump is reduced when the head is used in excess of the rated head, and the shaft power required for the pump is increased when the head is used below the rated head. When the head is reduced a lot, the shaft power required by the pump will be greatly increased. At this time, the load of the submersible pump will increase and the stator current will increase and the stator windings will tend to overheat. If the submersible pump for a long time in low head, high flow operation, the stator around the heat is very powerful, often burn the motor. For axial flow pumps, the opposite is true: when the head is low and the rated head is used, the shaft power required by the pump is reduced; when the used head exceeds the rated head, the shaft power required by the pump increases; The shaft power required for the hot water submersible pump will be greatly increased when the head lift is higher than the rated head, and the stator windings of the submersible pump will overheat. If the axial flow submersible pump for a long time in the high-head operation, the stator winding heat is very powerful, often burn the motor. Submersible pump can generally 0.7-1.2 times the rated flow range of normal operation (sewage sewage submersible pump can be 0.7-1.3 times the rated flow range of normal operation), beyond this range, may produce overload, requiring users to Selection and use of submersible pump, you must consider the appropriate scope of use. Especially for multi-level wells with submersible pumps, the more need to pay attention to: high-lift submersible pump, not too low for the lift, so as not to waste energy, but also damage the hot water submersible pump.
3, a reasonable choice of hot water submersible pump the appropriate specifications
    Users in the purchase of submersible pumps, should be in accordance with the required head and flow size, try to use parameters close to the specifications, especially the use of submersible pump lift not too high (or too low), so as not to be too low Or too high) when the use of head, not only a waste of energy, but also on the hot water submersible pumps have a negative impact.