Operation of centrifugal pumps
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What are the specific steps involved in switching between centrifugal pumps?
1. Open the inlet valve of the pump to be switched over. 2. Start the motor. 3. Open the outlet valve. 4. Close the outlet valve of the previous pump. 5. Stop the motor. 6. Close the inlet valve
It’s acceptable to follow the proper procedures on the 2nd floor, but many people don’t do it that way – they turn on the valve first and then the pump
The moderator can search on the forum; there’s definitely a set of operating procedures you’re looking for.
1 First, start the backup pump; once the outlet pressure stabilizes, 2 adjust the load equally by operating the outlet valves of both pumps, 3 until the outlet valve of the original pump is fully closed. 4 During the switching process, it is essential to ensure stable flow at the total outlet to avoid causing fluctuations in the system.
All the methods mentioned above are viable; when starting the backup pump, the outlet valve should be left slightly open! Of course, there is also an less formal method, which is to first stop pump A and then start pump B! Of course, this only applies when stopping the pump will not have a significant impact on the system; if it’s not possible to stop the pump, then one must follow the steps as instructed!
1. Check the lubricating oil and seal water systems (including the cooling system) of the pump to be switched over, and open the inlet valve of the pump to be switched over； 2. Turn the pump manually to check for any sticking; once it is confirmed that there is no sticking, start the motor. 3. Open the outlet valve and verify that the pump is operating properly ； 4. Close the outlet valve of the previous pump. 5. Stop the motor and close the inlet valve. 6. Check the parameters and operating conditions of the pump that is currently in use, and verify that the current is below the rated value.