Cavitation problem in condensate pumps
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Problem of erosion in the condensate pump: Recently, the mechanical seal of the unit’s condensate pump has been leaking. Upon disassembly for repair, it was found that the pump casing had suffered significant erosion. What is the cause of this?
Measure the pH value; high temperatures lead to severe cavitation
High temperatures cause cavitation; our impeller was in a mess like a beehive, so it had to be replaced
The scouring of the condensate pump is caused by cavitation
Add a flash tank in front of the inlet to prevent cavitation inside the pump.
The pH value is around 9; we test this condensate every few days
We have a condensate tank ahead; the steam from the top of the tank is recovered and then returned to the tank
In my opinion, it’s best to control the temperature of the condensate water (by using a cooler) and adjust the pressure in the piping system, so as to prevent the pump from experiencing cavitation – that’s just my personal view.