Problems with horizontal single-stage centrifugal pumps
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Medium: plain water. The motor is operating normally, and the pump is running smoothly as well. As soon as the outlet valve was opened, the motor stopped working. What’s the reason? Excluding the outlet valve, the outlet valve was fully opened before starting the pump; yet the motor stopped working again after less than 10 seconds of operation? Why? ? Help! ! 1
This type of vehicle derailment is caused by overload; the opening degree of the outlet valve should be set so that the head pressure does not exceed the maximum rated value, and it is not necessary to open it fully.
Has the power calculation for the motor and pump been done? Our unit had a similar situation; no matter what we tried, it didn’t work, so we ended up replacing it with a high-power motor. There is another pump whose impeller has been cut.
Similarly, the other one is working fine; now I suspect the current value has been reduced!
Has the power calculation for the motor and pump been done? Our unit had a similar situation; no matter what we tried, it didn’t work, so we ended up replacing it with a high-power motor. There is another pump whose impeller has been cut.
Is the pump’s outlet connected directly to the atmosphere or to the system?
In such cases, the electrical system should be checked first (to see if there is overcurrent in the motor operation, as well as the condition of components such as protective devices and relays). If the electrical system is fine, then the actual power of the pump should be compared with the specified value, using the performance curves (or factory test data) for this purpose.
There is no liquid in the outlet pipeline, which causes the motor to overload after the pump is started.
Check whether the heating element is set properly, and verify if there is any sticking