Pump repair
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How should pumps in chemical processing equipment be inspected after maintenance is completed? Are there any steps for the inspection? Thank you. Open the inlet to check for leaks in oil and cooling water; close the discharge valve, supply power, and see if the centrifugal pump starts with the outlet closed, while also listening to whether the sound of the pump is normal.
Your inspection process is basically done
You’re pretty much right; first do a leak test, then power it on to check for forward and reverse rotation as well as its operation.
Manually turn the shaft before starting to check for any jamming. For external flushing mechanical seals, it is necessary to ensure that the pressure and flow rate of the flushing water are normal, and that there is no leakage from the mechanical seal. Before starting the pump, close the outlet manual valve; after it starts, slowly open the outlet valve. Listen for any abnormal noises from the bearings, measure the vibration at the bearings, and check the outlet pressure, current, and flow rate. Check for leaks at all seals.
Starting the pump without turning on the seal flushing water can cause the temperature of the mechanical seal to rise sharply, damaging the O-rings and leading to medium leakage
Generally, this involves checking the cooling water and lubricating oil of the pump, as well as the pump’s rotation direction, seal leakage, and any noises or vibrations during operation； If transporting hot materials, the pump also needs to be preheated before operation, after which its performance is monitored to determine whether it can reach the required working condition.
Everyone has covered quite a lot! :(:)
To perform shaft turning, it is also necessary to open the drain for air release