Cause analysis and solution of the sewage lift pump without water

Sewage pump does not pump water into the water inlet pipe and pump body with air

1. Before the start of the sewage pump is not filled with enough water, sometimes seems to be filled with water from the vent overflow, but did not turn the pump shaft will be completely discharged air, resulting in a little air left in the water pipe or pump body;

2. Contact with the water pump water level of the pipe section against the flow direction of the application of more than 0.5% of the decline in the slope, connect one end of the pump inlet of the highest, not to complete the level. If the upward tilt, will be retained within the inlet air, reduce water pipes and pumps in the vacuum, the impact of water;

3. Pump filler used for long-term wear and tear or packing has been pressed too loose, causing a lot of water ejected from the shaft sleeve and fill the gap, the result is outside air into the pump from the gap, affecting the water extraction;

4. Because of the long-term potential of the water inlet pipe, the pipe wall corrosion appear holes, water pump works, the water continued to decline, when these holes exposed, the air from the hole into the water inlet pipe;

5. Cracks in the water inlet pipe elbow, the water pipe and the water pump connection at the emergence of a smile gap, it is possible to make the air into the water inlet pipe. Sewage pump does not pump water

Sewage pump speed is too low

1. Human factors, damage to the part of the user because of original motor, free with the other a motor driven result in low flow pump, low head and Sheung Shui;

2. Mechanical failure of the pump itself; impeller and pump shaft fastening nut loose or pump shaft deformation and bending, resulting in impeller movement, directly with the pump body friction, or bearing damage, it is possible to reduce the pump speed;

3. The power machine repair ineffective; motor windings burned because of loss of excitation, maintenance of winding turns, wire diameter, wiring methods of change, or repair the fault does not completely rule out the factors will also change the water pump speed.

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