To prevent the occurrence of auto erosion, NPSHA must be increased, so that npsha> NPSHR can prevent the occurrence of auto erosion as follows:

1 . Reduce geometric suction height HG (or increase geometric inverted height);

2 . Reduce inhalation loss HC, so you can try to increase the pipe diameter, try to minimize the length of the pipeline, elbow and attachment, etc.;

3. Prevent for a long time from running under large flow;

4. Under the same speed and traffic, the dual -suction pump is used, which is not easy to erode due to reducing the import flow rate and the pump is not easy to occur;

5. When the water pump occurs, the flow should be slightly adjusted or the speed should be reduced;

6. The situation of the water pump suction pool has an important impact on pump erosion;

7. For pumps running under harsh conditions, in order to avoid auto erosion destruction, it can be used for vapor -resistant materials.