What are the reasons for the pit pump not working
Analysis of the faults and causes of the pit pump
1. Faults: there is flow but no pressure or lack of pressure
Reason: The manual pressure relief valve has poor sealing, the pressure regulating spring is tired; the nozzle hole is worn.
Solution: Correction; Replacement.
2. Problem: pump pressure suddenly rises
Reasons: safety valve failure, pressure relief valve failure, system failure.
Solution: Check and correct the problem.
3. Faults: the working noise is loud and the impact is loud
Reasons: the crankshaft and the bearing bush are severely worn, the clearance is too large, the connecting rod screw moves; there is debris in the pump, the gear is damaged, and the suction is insufficient.
Solution: Replace, tighten; clean, replace; check.
4. Fault: severe leakage at the plunger seal
Reason: the seal ring is worn or damaged; the plunger is severely scratched.
Solution: Replace the seal; replace or repair the plunger.
Analysis of the reasons why the pit pump does not work
Do you know why the newly purchased submersible sewage pump or the submersible sewage pump in use will inevitably encounter the phenomenon that the pit pump does not work, and when you encounter this phenomenon, you do not know the reason why the pit pump does not work. The following is for you Share the reasons why various pit pumps can’t work:
1. The reason why the pit pump can't rotate may be: If the submersible sewage pump used is an active stirring sewage pump with stirring function, it is very likely that the fiber contained in the liquid or other sundries are entangled with the impeller. The above may be blocked in the pump body, causing the phenomenon that the pit pump cannot rotate.
2. The reason why the pit pump does not rotate may also be caused by the damage of the bearing of the pit pump, which makes the pit pump stuck and trips as soon as the pump control cabinet is started. At this time, it should be replaced with a new one. Bearings.
3. The reason why the pit pump does not work may also be that the liquid being transported is corrosive. The general cast iron sewage pump is simply corroded. The impeller nut is corroded and loosened, causing the impeller to touch the pit pump body. If the pit pump does not work, it is recommended to use stainless steel pit pump products made of stainless steel.
4. After replacing the new bearing, it still does not rotate. At this time, the reason why the pit pump does not rotate may also be the problem of the motor rotor of the pit pump. The diameter of the motor rotor is slightly thicker. The phenomenon that the pit pump motor is difficult to roll appears. This situation can only be solved by replacing the new motor rotor or removing the old motor rotor and turning it on the lathe for about 30 microns. .