Vacuuming treatment for centrifugal pumps
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How does everyone deal with pumping vacuum in centrifugal pumps, especially multi-stage centrifugal pumps? Is it by simply shutting down the pump?
Of course, reduce the flow rate first; once the flow rate is lowered, switch to the pump as soon as possible.
1. The first reaction is usually to simply shut down the pump, but pumping vacuum can also occur frequently when doing so. 2. Exhausting is one possibility, but some toxic substances cannot be discharged; this refers to the medium used to fill the pump at the inlet.
Find out the reason for the time gap. Switch to the backup pump. If it is a downtime period, you can choose to ask questions quickly to get through.
For multi-stage centrifugal pumps, it is important to deal with vacuum conditions promptly; otherwise, it can easily lead to damage to the pump.
Cut the pump! There is also cavitation caused by the increase in medium temperature under low flow conditions, and cavitation occurs when there is insufficient static pressure of the material under high flow conditions!
You can touch the pump body with your hand or measure its operating temperature!