Centrifugal pump
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Why does a change in the components being transported by a centrifugal pump lead to pump cavitation?
Is it the change in components that causes gas to be generated, resulting in an inability to pump enough fluid? The term “emptying” refers to the act of continuing to draw out the material once it has been polished inside the container; only then is it considered emptying.
Materials that are volatile and prone to producing gas, as well as a pump with insufficient net positive suction head, can all cause the pump to fail to deliver fluid.
Can the net positive suction head of the unit still be ensured after the component modification? The pump is already ready; as long as it isn’t severely damaged, its required net positive suction head can be considered constant
It might be caused by cavitation. Each pump is selected initially based on specific parameters such as the medium, temperature, pressure, and flow rate. Therefore, when the composition of the medium changes, the pump’s net positive suction head may no longer be sufficient to meet the current process requirements, leading to pumping failure. Just as many of the pumps in our systems are equipped with purge steam, if steam leaks into the pump body through the valve, cavitation can also occur ； The first seal of the high-temperature slurry pump uses sealing oil (diesel), and an excessive amount of light diesel entering the pump can also cause cavitation and evacuation. The above answers are for reference only.
Why does a change in the components transported by a centrifugal pump lead to pump cavitation? To be more specific, I don’t understand
Consider whether cavitation is the cause; it’s possible that vaporization occurs during the medium transfer
I’ve studied it a bit; it seems to be related to cavitation.
All centrifugal pumps have an effective NPSH, which is determined by the fluid being transported; for example, the effective NPSH of pumps used for transporting water and gasoline is different. When the properties of the fluid change, its vapor pressure also changes, which affects the pump’s ability to draw in fluid, leading to cavitation and ultimately pump failure
After the composition changes, the vaporization of any component within it can cause pump cavitation; therefore, cavitation is caused by the component with the higher saturated vapor pressure