Self - priming pump is widely used because it can be used for automatic water absorption, and there are many kinds of self - suction pump. The non - sealing self - suction pump is one of them. But if the pump does not come out of water, it is a headache, many people do not know the problem at all, and can not solve the problem fundamentally. Today, the new light pump industry gives us a comprehensive analysis of the cause of the self - suction pump without water.

One, if the inlet pipe and the body of the pump have air, it is impossible to pump water automatically. There are many reasons for this phenomenon. For example, before filling up, enough water was not filled. Sometimes the water that appeared to be irrigated was spilled out from the vent hole. However, the air was discharged completely without rotating the pump shaft, resulting in a little air remaining in the inlet pipe or pump body. There is also a long-term intake of water. Due to long-term potential underwater, there is a hole in the corrosion of the pipe wall. After the water pump works, the water surface keeps falling. When these holes appear on the water surface, the air enters the water inlet pipe from the hole. If there is a crack at the elbow in the inlet pipe and a tiny gap between the inlet pipe and the water pump, the air will enter.

Two. The speed is too low. Some users because of original motor damage, may be accompanied by another motor, resulting in a flow of small, low head or even the consequences of Sheung shui. The motor loses its magnetic field due to the burn out of the winding. The change of winding number, wire diameter and wiring method during maintenance, or the failure of failure in maintenance will also change the speed of the pump. Impeller and pump shaft fastening nut loosening or pump shaft deformation and bending, resulting in multiple displacement of impeller, direct friction with the pump body, or bearing damage, all of which may reduce the speed of pump.

Three, the suction is too large, some of the water is deep, some of the water resources are flat on the outside, but the suction of the pump is ignored, resulting in the result of less water absorption or no water at all.

Four. The loss of resistance in the inlet pipe of the flow is too large, and it will also cause no water from the suction pump.

Effect of self-priming pump self suction performance of many factors, common is these, but the situation is different, the reasons are different, there may be serious wear of impeller, pump performance, or export pipeline leak will affect the performance of self suction pump, can be ruled out to solve the problem according to the actual situation.

• Print
• Close This Page
• Recommendation：
• 
• Browse：