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Messages - Geek

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Irrigation / Re: Big Pump, A Hill and High Pressure
« on: February 23, 2016, 12:56:04 PM »
Thank you sir.  One big CSV valve and large tank dialed in.  So appreciate your input on this.

G

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Irrigation / Re: Big Pump, A Hill and High Pressure
« on: February 22, 2016, 09:31:48 AM »
Cary,

I can live with the 50psi and 35 GPM.  I just have to re-think the number of feeds for each leg of the manifold.  Since I would be running below the 50GPM rating of the CSV2W I would think it would work for this application?  How would you suggest the set up be at the bottom of the hill (i.e. pressure switch setting and tank size to give the pump some time to chill)  Thank you so much for the help here.

Geek

3
Irrigation / Big Pump, A Hill and High Pressure
« on: February 21, 2016, 09:56:28 PM »
I have what I think is a bit of a strange application or at least not the norm of what I have read from other sources.  I have irrigation water (not a well but supplied from an irrigation water coop) system where the water comes in  to my property at a lower level than where I need to use the water.  Literally 40 feet of vertical difference between the pump and the demand.  This is the first time I have gotten to play with water pumps and such so have zero experience to fall back on.  We bought this property and needed to get the irrigation system hooked up quickly as it was the only water available during the construction.  Living up to the old adage of “you need it bad – you get it bad”  I went to a plumbing/pump company in town and they told me what I needed as far as pump and such to feed the rainbird system I needed to feed at the site.  The bad news was that I couldn’t get the thing to operate correctly with the pressure switch the way the ‘experts’ had said to do it.  When I started asking questions like “Do I need a pressure tank for this” and saw the deer in the headlight look, I knew I was on my own.  The good news was that I could manually switch the pump on and off and it would work so at least I had water at the site for the fire safety requirements.

So what do I have.  I have a Berkeley B82456-01 jet pump that can do 55GPM and up to 130 psi.  It’s a beast.  What I would like is to have about 80psi at the top of the 40 foot hill (which I think means about 100 psi or so at the pump).  I was looking at the CSV2W 50-120psi version and thought that, along with a pressure tank would be my solution.  Then I saw the 50GPM upper limit on the CSV to which I had my first big question: is my pump too big for the CSV?   Is it more along the line of if I don't actually have a draw of 55 GPM and more like 40 GPM will I be OK with the CSV2W running at 100psi?

What is/was my plan.  Use a pressure switch set to 110 psi with a 20 psi differential set in.  Use a 14 to 20 gal pressure tank rated at 150psi and set the reference pressure on the tank to 88psi.  I used a bit larger tank so that the drawdown on the tank when run at the 100psi pressure was in the 4 GPM range.  So once the demand was removed and the CSV started to fill the tank back up, it had some time to run the pump and not just cycle off immediately.

Does this make any sense?  Am I on the right track or quickly heading out to left field with no mitt?

Any direction you can steer me towards would be most appreciated.

Thank you for your time on this.

Geek

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