Centrifugal pump pressure and flow issues
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One of the centrifugal pumps in our factory fails to achieve the same pressure and flow rates as the other one; previously they were similar, but lately the performance has been poor. What do you think could be the reasons? ?
The pump body is worn out, the impeller is blocked, the inlet pipe is blocked; check whether there is any blockage in front of the pressure gauge
Blocked inlet, worn impeller, differences in the pump itself: quality, manufacturer. . . . .
There is no problem with importing medium-sized fruits; the key is to check the reasons for the assembly clearance of the pump
Stop the pump and check it carefully to find out exactly what the cause is!
Inspect the mechanical seal, pump impeller, and motor
What is the installation location like? Is there sufficient NPSH? Has the gap between the impeller and the pump casing increased, and is the impeller damaged?
The medium being transported tends to form scale, and the impeller may get clogged.
I think it’s the gaskets that have aged, or maybe the gaskets of the two pumps have been repaired!
Channel blockage or wear of operating clearance...
The impeller is worn, or the inlet pipe is blocked.
1: Check whether the shaft seal is leaking, which is causing a decrease in efficiency. 2: Is the impeller severely worn? 3: Is there also a problem with the installation height, resulting in cavitation?
1: Check whether the shaft seal is leaking, which is causing a decrease in efficiency. 2: Is the impeller severely worn? 3: Incorrect installation height can lead to cavitation. 4: Does the fluid being transported contain a lot of debris?
If the specification and model parameters are the same, there is a higher likelihood of problems with the impeller and pipes. The motor speed is also a problem; it’s not clear whether the material is the same or not
An increased gap between the impeller and the pump casing, damage to the impeller, and wear of the outlet flow channel can all cause this phenomenon.
Check the pump’s lip seal. The fit of the inter-stage bushings, etc.
It is estimated that the poor sealing of the shaft seal is causing a decrease in the pump’s efficiency. If it is used for too long, the impeller of the pump will wear out. Are there any blockages in the pump’s inlet and outlet pipes?
First, check for leaks! Let’s check if the filter is clogged! There are miscellaneous items and such! ! Next, check whether the impeller is corroded! ! ! If there are no issues with maintenance, then check whether there are problems with the motor (reverse rotation, insufficient speed, unstable current, etc.). Also, check if the pressure gauge is damaged! ! ! Just find the gauge! ! !
1. Check the assembly clearance to see if there is any wear. 2. Check whether the shaft seal is leaking. 3. Check if there are any changes in the current of the drive motor, or if the output power has decreased. 4. Check whether the piping system is unobstructed
We have a submersible pump whose impeller often gets scaled, and it dissolves when soaked in hydrochloric acid. 1. Scaling on the impeller and pump casing 2. Scaling or blockage in the inlet pipeline