Problems with centrifugal pumps and siphon tanks
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I’m facing such a problem now. (The customer asked about) a regular centrifugal pump with a self-priming tank attached to the suction inlet. The department using it reported that after the pump is turned off for a certain period of time and then restarted, it is unable to draw water, requiring re-priming. Other similar pumps are not needed; once the pump is filled for the first time, it doesn’t need to be filled again thereafter. Only this one has this issue. Moreover, there is no air leakage in the pipes. Does anyone know what could be the reason?
It must be leaking; otherwise, the water wouldn’t run out
I suspected the same thing, but the client ruled it out, saying they had checked the pipes and there was no air leakage.
Are the lengths of the inlet pipes for each pump the same? If the suction pipe is longer than that of the other pumps, this situation can also occur
Oh, I see. I’ve learned it*. Thank you
Check the check valve to see if there is internal leakage, which could be causing the vacuum issue at the pipe inlet.
Forgot to mention it – all the inlet pipelines have been replaced with new ones!