The main reasons for the failure of Stainless Steel Submersible Sewage Pump are as follows:

The first reason: the speed of the sewage lift pump is too low

1. Human factors; some users randomly couple the front analyzer to another motor due to damage to the wife's motor, resulting in low pump flow, low lift, or even no water;
2. The pump itself has a mechanical failure; the fastening nut of the impeller and shaft is loose or the bent shaft is deformed, causing the impeller to move. Direct friction with the pump or damage to the bearings may reduce the pump speed;
3. The maintenance of the power machine is invalid; the maintenance of the winding turns, wire diameter, and wiring method has changed due to the magnetic field loss caused by the burning of the motor winding. Replacing or repairing the fault does not completely eliminate the fault factors and also causes the pump speed to change.

The second reason: no water, the water inlet of the sewage lift pump and the pump body are full of air

1. Before the sewage pump is filled with enough water before starting, it sometimes looks like irrigation water from the drain hole, but after the air on the rotating shaft is completely discharged, a small amount of air remains in the pump inlet or in the pump;
2. In the application of reverse flow to the pump inlet, when the slope of the horizontal section is reduced by more than 0.5%, the pump inlet is connected to the highest end, not completely horizontal. If it is tilted upwards, it will remain in the air intake, reducing the vacuum of the pipeline and pump, and absorbing the impact;
3. The packing of the pump has been worn out due to long-term use or the packing is too loose, causing water to accumulate in the packing and shaft sleeve. Clearance discharge, the result is that these clearances enter the inside of the pump from outside air, which affects the pumping;
4. Due to long-term diving into the water, there will be corrosion holes on the wall, and these holes will disappear when the pump workload decreases. After the water is discharged from the hole, air enters the hole from the water inlet pipe;
5. The water inlet pipe is bent and cracked, the smile of the gap appears and the connection of the pump inlet pipe is likely to cause air to be sucked into the water inlet pipe.

The third reason: too much suction

For some deeper water, the outer terrain of some water is relatively flat, and the allowable pumping force is ignored, which results in little or no water and no water absorption. It can be determined that the vacuum of the suction port of the sewage pump is limited, the absolute vacuum suction of water is about 10m high, and the pump cannot establish an absolute vacuum. With a large front-end analyzer and vacuum, the water in the pump can easily vaporize a job in the pump. Therefore, the maximum suction of each Stainless Steel Submersible Pump is usually between 3-8.5m.