The issue of changes in outlet pressure when the inlet pressure of a centrifugal pump increases
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Hello everyone, I’m a newcomer to the field of chemical engineering. I have a question: for the same centrifugal pump and the same type of fluid, what happens to the outlet pressure of the pump when the inlet pressure increases? Is it increased by the same amount? If it is within the limits of the equipment’s strength, does this rule always hold true?
Yes, the outlet pressure of the pump is equal to the inlet pressure + head * specific gravity * 102
Yes, the outlet pressure of the pump is equal to the inlet pressure + head * specific gravity * 102
In theory, that’s the case, but in practice it’s not that simple. Please choose carefully!
What was said upstairs is correct: for the same centrifugal pump and the same type of fluid, as the pressure at the pump inlet increases, the pressure at the pump outlet also increases. As long as the equipment’s strength allows it, this rule should hold true. However, in practical applications, taking into account fluctuations in liquid level and pressure, it is necessary to select a pump with an appropriate margin of safety.
The pipeline network pressure also needs to be taken into account; if the pipeline network pressure increases, the outlet pressure of the pump will increase as well. But it won’t exceed 0.8 MPA. For the cartridge centrifugal pumps we use here, as well, if the return flow in the piping system is smooth, the pressure should also decrease, right? What I say may not be correct; please feel free to offer criticism and suggestions. Thank you.