Common Fault and Solution of DG Multi - stage Boiler Feed Pump

    In the daily use of the DG multi-stage boiler feed pump , it is not uncommon for you to encounter pump failure, so what do you know about the common faults of the pump? To solve it? The following is the DG-type multi-stage boiler feed pump common solution and solution.

    1, the pump does not absorb water, the pressure gauge and vacuum gauge pointer violently beating the water pump enough. Should go to the water pump, tighten or plug the leak.

    2, the pump does not absorb water, the vacuum gauge shows a high degree of vacuum inlet pipe is not open or blocked; The reason is that the water resistance is too large, the water absorption height is too large to allow the value of the water inlet pipe check. When this happens, you can use to clean or replace the suction pipe, reducing the height of water absorption method to solve.

    3, look at the pressure gauge water pump pressure, and the pump is still not water, water pipe resistance is too large. The reason is that the rotation direction is not correct, impeller fouling, pump speed is not enough. When this happens, you should check or shorten the outlet pipe, change the motor steering, cleaning the impeller, increase the pump shaft speed to solve the problem.

    4, the flow is lower than expected pump blockage; seal ring wear too much; speed is not enough. Pumps and piping should be cleaned; seal rings replaced; pump shaft speed increased.

    5, the pump consumes too much power, the packing gland is too tight, impeller wear; gate valve should be adjusted to reduce the flow, loosen the packing gland or packing removed; replace the impeller.

    6, abnormal noise in the process of the pump , the flow decreased until no water, the balance valve wear early wear too much; suction pipe resistance is too large, there is air infiltration at the suction, suction height is too large, the liquid temperature over high. In these cases, the gate valve should be adjusted to reduce the flow, check the suction pipe, check the bottom valve, reduce the suction height, tighten or plug the leakage, reduce the liquid temperature.

    7, pump vibration Pump shaft and motor axis are not in the same center line, this time should pump and motor shaft centerline alignment.

    8, bearing overheating oil or dirty oil, this time should be oiling or oil change.

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