Why Does The Slurry Pump Not Discharge Water? Find The Reason Here

　　Why doesn’t the slurry pump come out? Come here to find the reason. Recently, I received feedback from many customers asking why the slurry pump cannot produce water. Then the editor sorted out the reasons why the slurry pump cannot produce water. I hope it can help you. Let’s take a look next!

　　1. There is air in the water inlet pipe and pump body

　　(1) There is no sufficient water filling before the slurry pump starts, and a small amount of air remains in the pump chamber.

　　(2) When the slurry pump is installed, the horizontal section of the water inlet pipe in contact with the pump is sloped more than 0.5% against the direction of water flow. The end connected to the pump inlet is the highest and not horizontal. If raised upwards, air will remain in the inlet pipe, reducing the vacuum in the water pipe and pump, affecting slurry suction.

　　(3) The filler of the slurry pump has worn out due to long-term use or is too loose, causing a large amount of slurry to be ejected from the gap between the filler and the pump shaft sleeve. As a result, external air enters the pump from these gaps, affecting suction.

　　(4) The water inlet pipe has been submerged underwater for a long time, with holes appearing on the pipe wall. After the pump works, the water surface continues to drop. When these holes are exposed to the water surface, air enters the inlet pipe from the holes.

　　(5) Small cracks in the pipeline, or slight gaps at the connection between the water inlet pipe and the pump, may cause air to enter the water inlet pipe.

　　2. The speed of the slurry pump is too low

　　(1) Artificial factors. Some users randomly replace the original motor with another one due to damage, resulting in small flow, low head, or even no water supply.

　　(2) The impeller of the slurry pump moves excessively, directly rubbing against the pump body or damaging the bearing.

　　3. The suction range is too large

　　Some water sources are deep, and some have flat terrain. Ignoring the allowable suction range of the pump results in little or no water absorption. The vacuum degree that can be established at the water suction port of the slurry pump is limited. The maximum vacuum suction range is about 10 meters of water column, and the pump cannot establish a higher vacuum. Moreover, excessive vacuum can easily vaporize water in the pump, which is unfavorable. Therefore, the pump must be installed within the maximum allowable suction range, and installation should not be done for convenience and simplicity.

　　4. The resistance loss in the water flow in the inlet and outlet pipes is too large

　　Some users find that although the vertical distance between the reservoir or water tower and the water source surface is slightly smaller than the pump head, the water output is still small or no water is lifted. The reason is often that the pipeline is too long, there are many bends, and the water flow loses too much resistance in the pipeline. In addition, some users randomly use inlet and outlet pipes that are too small, which also affects the head.

　　5. Influence of other factors

　　(1) The bottom valve cannot be opened. Usually, because the pump is shelved for too long, the bottom valve washer is stuck, or the bottom valve without a washer may rust.

　　(2) The filter mesh of the bottom valve is blocked; or the bottom valve is submerged in the sludge layer, causing the filter mesh to be blocked.

　　(3) The overflow parts are seriously worn. The impeller blades, sheaths, and shields are worn after long-term use, affecting the pump's function.

　　(4) If the gate valve or check valve is faulty or blocked, it will reduce the flow rate or even prevent slurry from being pumped.

　　(5) Leakage in the outlet pipeline will also affect water supply.