Pump/piping question
Pump/piping question
(OP)
I have two pumps operating in separate sumps and joining at tee and entering a tank through a single line. All lines are 2" O.D. HDPE SDR 11 pipe, shortly after the connection, the line enters a manhole and exits as a 4" SDR 11 HDPE Pipe. I have very little info on the pumps other than one was spec'ed at 55 GPM at 96' TDH and the other at 53 GPM at 85' TDH. I need to ensure this configuration is not a problem, especially in the 2" line before it expands to 4". Any insight on how to best check this? Thanks.





RE: Pump/piping question
RE: Pump/piping question
RE: Pump/piping question
RE: Pump/piping question
RE: Pump/piping question
RE: Pump/piping question
plot both pump curves on the system head curve
where they intersect will give you the approximate flow from each pump
now add the two pump curves together to get combined flow and plot that on the system curve.
intersection point will be the combined flow from both pumps.
this only requires graph paper and a calculator or better yet, Excel
you can find the procedure in any basic engineering text book for applied hydraulics
RE: Pump/piping question
Thank you, I was had downloaded EPANet, but was not sure how to model it. I still have a few questions, where can I input the design point of the curves? I think I am overlooking something. When I right click and select the properties of my pumps, that is not an input.
RE: Pump/piping question
RE: Pump/piping question
Thanks for all the help! May I ask what modeling program you use? One last question thought, the model ran and it shows my combined flow entering the tank; however, it is showing a negative flow downgradient of one of my pumps. It doesn't make sense because I said it is going into the tank. Any thoughts?
RE: Pump/piping question
We use Infowater modeling software.
RE: Pump/piping question