The reasons and solutions for the long self-priming time of self-priming pumps

The self-priming performance of various types of self-priming pumps varies. When using various self-priming pump products, it is often encountered that self-priming pumps require a long time to suction water during the self-priming process. If the self-priming time is too long for emergency drainage or production water, it will delay emergency rescue and production needs, So it is necessary for us to share with you the reasons for the long self suction time of the self suction pump and the solutions for the long self suction time of the self suction pump for reference:

1. The reason for the long self suction time of the self suction pump is likely due to slight air leakage in the inlet pipeline. The solution to this problem is to fill the self suction pump with water and run it for about 5 minutes. After that, it is necessary to ensure that the ear is close to the suspected air leakage point of the inlet pipeline in a quiet environment and listen for the sound of suction, because after the self suction pump runs for a period of time, a certain negative pressure will form at the inlet, After shutdown, if there is a leakage point under negative pressure, the atmosphere outside the pipeline will be sucked into the inlet pipeline.

2. Due to the long length of the inlet pipeline of the self suction pump, it is the reason for the long self suction time of the self suction pump. After the inlet pipeline is too long, there is a lot of air in the pipeline. The self suction pump needs to evacuate the air in the inlet pipeline to create a negative pressure in the inlet pipeline before it can suck in water. Therefore, if the inlet pipeline is too long, a lot of air will be discharged by the self suction pump and it will take some time to be completely discharged, The solution to this problem of long self suction time is to shorten the inlet pipeline of the self suction pump or switch to our company's vacuum self suction pump.

3. Due to the presence of n-shaped curved pipes in the imported pipeline, especially when using flexible hoses, it is easy to occur. The solution is to straighten the imported pipeline.

Another reason for the long self suction time of a self suction pump is that the end of the outlet pipeline of the self suction pump is submerged in the liquid, making it very difficult for the air pumped by the pump to beat up. The solution to the long self suction time of this self suction pump is to expose the end of the outlet pipeline to the atmosphere, allowing the air to be quickly discharged.

4. It is also possible that the high temperature of the liquid medium self absorbed by the self suction pump may cause cavitation in the self suction pump. The solution for such a self suction pump with a long self suction time is to reduce the temperature of the liquid or fill the pump body with cold water before starting.

The larger diameter of the suction pipeline compared to the pump diameter can also be the reason for the long self suction time of the self suction pump, as the enlargement of the inlet pipeline will reduce the self suction capacity of the self suction pump. It is recommended to choose a pipeline that matches the inlet of the self suction pump.

5. If a self priming centrifugal pump product is used to transport wastewater containing particles, the self priming time is fast at the beginning, but slow after using it for a period of time, it is likely that the pump body has encountered blockage. The solution to this problem is to replace the self priming sewage pump product appropriately.