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Low Suction Pressure Issue In Pump
#1
Posted 29 May 2023 - 09:57 AM
Pump is motor driven and ampere found normal.
What is a issue and how to overcome this problem?
#2
Posted 29 May 2023 - 11:33 AM
So, is it a problem?
Bobby
#3
Posted 29 May 2023 - 02:27 PM
If a problem, is it the PT / PT installation, or is that PT just noisy?
#4
Posted 29 May 2023 - 09:45 PM
So in short issue is low suction pressure.
#5
Posted 29 May 2023 - 09:58 PM
My guess is excessive pressure drop in the suction line. Perhaps column internals collapsed to partially cover the outlet nozzle. Maybe some trash got lodged in the pipe upstream of the strainer.
#6
Posted 29 May 2023 - 11:06 PM Best Answer
Hi,
I'm with Pilesar, similar issue encounter in the past due to packing collapsing and obstructed the suction line bottom of vacuum column.
Need to shut down and inspect the suction line together with the bottom part of the column, during turn around.
Do you have possibility to investigate using an endoscope prior to shut down.
Good luck.
Breizh
#7
Posted 30 May 2023 - 04:14 AM
We have 2 parallel pumps but only one of them is facing this issue while other one is running completely normal. Is it possible that the small part of packing is collapsed and stuck in one suction pipe?
#8
Posted 30 May 2023 - 04:29 AM
Hi,
Definitely Yes.
EDIT : Do you need strainer at the suction of your(s) pump(s)?
Good luck
Breizh
#9
Posted 30 May 2023 - 04:31 AM
hi,
When this issue happens?
If this happens at the initial start up, then it maybe design error.
If this happens after long time running, then I am with Breizh that something may accumulate at the inlet, maybe packing of the column.
#10
Posted 30 May 2023 - 04:55 AM
And the problem occurs after running of 3 to 4 days.
#11
Posted 30 May 2023 - 10:53 PM
#12
Posted 31 May 2023 - 12:17 AM
Maybe the conponent of column should be analyszed. Sometimes the density will change when column performance is not good.
#13
Posted 01 June 2023 - 06:08 AM
Hi,
I also have experience on this system where thermal cracking of heavies (tars) affects the head at the suction of the pump. You may want to check for the thermal stability of your product.
Breizh
#14
Posted 02 June 2023 - 12:39 PM
#15
Posted 02 June 2023 - 06:55 PM
Hi,
We have no idea about your product thus difficult to support effectively. You may need to contact a third-party lab or university to perform the task. Prior to do so you should review the process book of your facility where you may find hints.
One way to check is to measure the loss in weight of the product versus temperature. Typically, this job is carried out in R&D dpt.
My view only
Breizh
#16
Posted 03 June 2023 - 06:39 AM
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