What are the causes of cavitation and what are the preventive measures?

As long as the parameters are controlled strictly in accordance with the operating procedures, cavitation will not occur. In the event of cavitation, it is necessary to check whether the parameters at each control point meet the specified requirements in accordance with the procedural parameters. This is the best prevention. You can look up the principle of cavitation on Baidu. For reference.

Cavitation occurs when the pressure at the impeller of a centrifugal pump is lower than the saturated vapor pressure of the liquid, causing the liquid to vaporize and generate numerous bubbles. When these bubbles move with the fluid into areas of higher pressure, they collapse rapidly due to the effect of the high-pressure liquid. At this point, the fluid rushes at extremely high speeds into the space previously occupied by the bubbles, resulting in localized hydraulic shock. Therefore, the reason is: insufficient pressure of the medium at the pump inlet ； The temperature of the medium inside the pump chamber rises, causing it to vaporize. In cases where a 53A sealing system is used, there may be a sealing leak, allowing gas to enter the pump chamber. Prevention: Ensure that the pressure at the impeller where the medium is located is higher than the saturated vapor pressure of the liquid ； Ensure the proper operation of the equipment, preventing pressure buildup and friction that could cause an increase in the temperature of the medium inside the pump chamber

The low liquid level at the pump inlet results in low pressure and air leakage into the inlet. The pump flow rate is below the minimum value, causing the medium to heat up and vaporize

Most cases of cavitation occur due to changes in the properties of the medium, especially when the temperature is too high