Messages

1

Irrigation / Re: Large Irrigation system

« on: January 04, 2024, 06:49:21 PM »

Wow!

Thanks for all the details.  This is a new well that has been installed and not commissioned yet.  I will call the wells company and discuss swapping out the CSV-1A with the CSV3A2T as you recommended.  Your explanation will be a big help in that effort.

Hopefully I will not have any any more questions.

Thanks again,

Regards,

Eric Stutes

2

Irrigation / Re: Large Irrigation system

« on: January 03, 2024, 02:31:40 PM »

Thanks for pointing out that the CSV did not look right. 

Correction Made:  I had GPM and PSI swapped in my CSV friction calculation

So for a rate of 25.9GPM

CSV friction loss = 17.0 psi
CSV reduced pressure falloff = 14.8psi

152.76psi Pump Pressure (@25gpm) - 43.35psi Riser Head Pressure (100ft) - 7.97psi Riser Friction loss (1-1/4" ID @25gpm) - 31.81psi CSV DP(@25gpm) = 70psi CSV Outlet Pressure

Is that right?

I just want to confirm if the CSV-1A is best for my setup or if I need to go back to my well contractor to change it out.  My target is for a flow at the Pump sweet spot of 22-28gpm which seems to be right for the CSV-1A.

3

Irrigation / Re: Large Irrigation system

« on: January 02, 2024, 05:09:44 PM »

Carl,

Thanks again for your input.  I tweaked the head counts in each zone.

Do these rate look more inline with the CSV1A sweet spot?

4

Irrigation / Re: Large Irrigation system

« on: January 02, 2024, 03:36:07 PM »

Cary,

Sorry, I may not understand the way a CSV works correctly

Assuming an 60 psi header pressure, my individual zone rates range from 13 - 29gpm based on the number of heads in each zone.

How should I determine the DP of the CSV-1A correctly based on the flowrate and CSV inlet pressure?

I was just referencing the attached CSV Reduced Pressure Fall Off Chart based on the flowrate.  Do I need to add the friction DP to that also?

And how does changing the setpoint impact the pressure reduction chart?

5

Irrigation / Re: Large Irrigation system

« on: January 02, 2024, 08:11:08 AM »

Thanks for the quick response. 

I was planning to set the stop pressure to 80psi which is the recommended max operating pressure of the sprinkler control valves.

6

Irrigation / Re: Large Irrigation system

« on: December 31, 2023, 08:03:15 AM »

Cary,

Good morning.  I am also in the process of setting up a large sprinkler system.

My zones rates will range from 10gpm to 28 gpm assuming a 50-75 psi output pressure from the CSV

Pump is a Franklin 25JS3S4-PE and the pump and topsides rate/pressures are shown in the attached table.

The well company installed a CSV1A with a 20gal tank.  Am I figuring the CSV output pressures as shown in my table correctly?  Is this the best setup for my application?

Thanks,

Eric Stutes