Recent Posts

41

Irrigation / Re: Large Irrigation system

« Last post by EPStutes 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?

42

Irrigation / Re: Large Irrigation system

« Last post by Cary Austin on January 02, 2024, 03:54:04 PM »

29 GPM is really too much for a 1-25 GPM CSV1A.  But if the pump is large enough you can squirt that much water through it.  Reduced pressure falloff is how much higher you have to set the CSV pressure at 3 GPM flow to get what you want at 29 GPM flow.  With 30 PSI of falloff the CSV would need to be set at 90 PSI (using a 80/100 pressure switch) to get 60 PSI at 29 GPM flow for the big zones.  There will also be more than 30 PSI friction loss, which means the pump must be able to do 29 GPM at 90 PSI to get 29 GPM at 60 PSI out of the CSV1A.

The CSV125 or the CSV3A2T would be much better for a 29 GPM zone/pump as they do not have reduced pressure falloff, and are larger valves with much less friction loss at 29 GPM flow.

If you can split up the zones and make them all smaller than 20 GPM the CSV1A will work fine.

43

Irrigation / Re: Large Irrigation system

« Last post by EPStutes 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?

44

Irrigation / Re: Large Irrigation system

« Last post by Cary Austin on January 02, 2024, 09:11:22 AM »

With a 60/80 pressure switch setting the CSV can be set to maintain 70 PSI constant.  That decreases the differential pressure to about 125 PSI, which is perfect for the CSV1A.

45

Irrigation / Re: Large Irrigation system

« Last post by EPStutes 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.

46

Irrigation / Re: Large Irrigation system

« Last post by Cary Austin on December 31, 2023, 11:09:54 AM »

Looks correct. So, even with a 50' water level and a back pressure of 195 PSI, setting the CSV for 50 PSI leaves 145 PSI differential pressure.  150 PSI is max differential we recommend for the CSV1A, so setting it higher decreases the differential and gives you more pressure at the sprinklers.

47

Irrigation / Re: Large Irrigation system

« Last post by EPStutes 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

48

Frequently Asked Questions / Re: System overhaul recommendations/advice

« Last post by Cary Austin on November 06, 2023, 12:52:56 PM »

The highest pressure shallow well jet pump I know of is the J15S, which will build 83 PSI max and work with a 50/70 switch and a CSV setting of 65 PSI.  https://www.lockewell.com/index.php?main_page=product_info&cPath=1_3_155_92&products_id=549

To get up to 60/80 with the CSV set for 70-75 PSI you will need a multi-stage centrifugal or a submersible.  Here is a multi-stage.  https://www.lockewell.com/index.php?main_page=product_info&cPath=1_3_86&products_id=1743

If you drop in a submersible you can use a pump like this for a fraction of the price.  https://www.ebay.com/p/18030648622

Any of them will work with CSV or the PK1A kit.  But to go 50/70 pressure or higher I would recommend the heavy duty pressure switch and the 10 gallon size tank.  Even with the heavy duty switch you can still turn it down as low as 30/50 if needed.   https://cyclestopvalves.com/pages/pk1a-pside-kick

49

Frequently Asked Questions / Re: System overhaul recommendations/advice

« Last post by Rollaknot on November 06, 2023, 09:45:02 AM »

Thank you Carey for sharing all of your priceless knowledge.  What pump would you recommend for this set up and would it be possible to go ahead and add the PK1A PSIDE-KICK with the 70 psi 60/80 switch and set it to accommodate the existing pump in preparation of upgrading to a bigger pump in the near future?  I am wanting to utilise the irrigation lines that were hear from the previous owners but with the current pressures it struggles.  I suspect they originally had a bigger pump to accommodate prior to the one installed now because they quit using the irrigation.

50

Frequently Asked Questions / Re: System overhaul recommendations/advice

« Last post by Cary Austin on November 04, 2023, 12:17:18 PM »

That pump builds a max pressure of 67 PSI.  That means the highest you can run the pressure switch is about 35/55 with the CSV set for a constant 45 PSI.  The constant 45 from the CSV will make it seem much stronger than when cycling on at 35 and off at 55. 

There must be a check valve.  It is probably on the suction line to the storage tank.  Filters cost you pressure.  Don't filter unless you have to.  You can do it.  The PK1A is easy to install.