Do I need to replace the pump body when changing the motor?
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Are the pump body and the motor part of the same set? The latest pump keeps tripping, and considering replacing it with a motor of higher power, is it necessary to replace the pump body as well? What will be the consequences if it isn’t changed? I need some advice. The nameplate of the pump body, and the nameplate of the motor
If the power difference is not significant, it may not be necessary to replace the pump. The key is whether the rotation speed has changed.
Are you testing everyone, or making them guess riddles?
The base numbers for the 5.5KW-2 and 7.5KW-2 B3 models are the same; however, the motor of this vertical pipeline pump features a non-standard hollow shaft, so it is necessary to follow the manufacturer’s specifications.
Is there a flow meter? Have you measured what the flow rate is? This pump has a capacity of 40 cubic meters per minute, a length of 25 meters, an efficiency of around 65%, and its shaft power is 4.2 kW
I study crafts and am interested in this field, but my knowledge is scattered; I need everyone’s help to organize this knowledge structure.
Is it the power of the motor? If the motor’s power, p=ui, is less than the power required by the pump, then that’s fine
No, I have currently identified several issues with this mechanical seal water treatment process: there is no plate exchanger, and internal leakage in the mechanical seal results in a high pH level. I’m not quite sure what you mean by \"foam\" – does it mean that if the power is similar, then it’s okay?
As the flow rate of a centrifugal pump increases, its power consumption also increases accordingly; the power is at its lowest when the valve is closed. Currently, the pressure gauge connected to the outlet of the pump is located after the valve, and it shows a pressure of only 0.09 MPa. The head of the pump is 25 meters, and if the inlet pressure is at atmospheric level, the outlet pressure should be 0.25 MPa. So the pump might be operating at high flow rate and causing overcurrent
By foam, you mean the state at export. I checked, and our import setting is at full level, but not for export. The greater the current, the larger the outlet, and the higher the pressure reading on the outlet gauge. However, our pressure is only this much, and the current reaches around 7A at most; what’s causing the pressure not to increase? (Is there some place where pressure is being released?)
It’s normal for the current to be higher as the flow rate increases, because that’s the characteristic of the power curve of a centrifugal pump – the power is at its lowest at the shut-off point. The output power of a motor with a current of 7A is around 3.5 Kw. First, your pressure gauge is not installed in the correct position. If there is a valve behind the pressure gauge, use this valve to make adjustments; monitor the reading on the pressure gauge and adjust the flow rate through this valve. If the inlet pressure is at atmospheric level, keep the pressure at 0.25 MPa, and check the current consumption of the motor at that point. If it’s around 8A. So the pump is fine.