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Working on a project with an underground water storage tank, where the water level is under the pump suction inlet. The pump type is a vertical turbine pump.
Is the a maximum vertical length of suction pipe for this type arrangement? Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
7 Comments
Glenn Berger
1/20/2022 08:10:54 am
With the impellers being located near the bottom of the "vertical drop pipe," I do not believe that there is a hard maximum length of suction pipe.
James Phifer
1/20/2022 08:17:23 am
NFPA 20: Fig A.7.2.2.1 (2016 ed) has a note that states:
Anthony
1/20/2022 08:28:47 am
In my experience every vertical turbine I've seen has a minimum submergence depth to ensure proper priming of the pump. So no suction length.
While there is no code-mandated maximum length that I am aware of, keep in mind that there are physical limitations on what the mechanical components of the pump can do. There is a drive shaft which extends down from the motor to the impeller and the longer you make that shaft, the more severe mechanical forces it will be subject to. The pump manufacturer will be able to tell you what the limits of their machinery are if you tell them a little about your application.
Jesse
1/20/2022 09:04:39 am
There is no code-mandated maximum length. There may be limitations with the specific pump, and of course the physics limitations in terms of how much water you can pull. 1/26/2022 12:46:35 pm
There is a theoretical height of about 10-meters that water can be sucked up before cavitation occurs...
Ian
6/6/2022 09:28:38 pm
Is there anyone that sell vertical turbine fire pump around NY? Leave a Reply. |
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