How to eliminate cavitation in pumps
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The pump currently in use is experiencing cavitation; the current level varies periodically, and shock noises inside the pump appear and disappear on a cyclic basis. What methods can be used to eliminate cavitation in this pump?
1. Replace with a new pump 2. Use variable frequency to reduce speed 3. Change the piping
The most fundamental solution is to increase its inlet pressure! That is, to increase its cavitation margin. Common engineering solutions: 1. Reduce the installation height of the water pump (increase the installation height of its inlet well); 2. Install a pre-pump in front of the water pump ； 3. Install an inducer wheel on the water pump ； 4. Reduce its outlet flow when the inlet pressure is insufficient ； 5. Install a recirculation system. 6. Improve the flow channel by using impellers with better cavitation resistance.
The most practical approach at the moment is to find ways to increase import volume
From your post, it seems like it was installed recently, right? In that case, it’s necessary to check the design and installation to see if they meet the requirements, such as the installation height issues mentioned by those upstairs. Otherwise, the problem with the pump itself should be considered.
Increasing the inlet pressure is the most direct method.