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Industrial / Csv in a dairy

« on: October 21, 2018, 03:59:30 PM »

I have a dairy with roughly 2000 head of cattle and am looking to install a csv. My current setup is a 7.5hp 3 phase motor pumping into a 1500 gallon air volume controlled tank through a 3" steel line with a 40/60 pressure switch. I know the standing water level is around 130' but I don't know much more than that. The pump was last pulled around 20 years ago by a company that no longer exists and I wasn't even at this dairy at that time.  My current pressure tank is in  dire need of replacing which is the main reason for me looking into a different setup being as pressure tanks are so costly and a csv system doesn't require such a large tank. So my questions are: can I install a csv with the limited information I have? A dairy is a 24/7 operation and I am relatively certain that at no point will the demand be less than 5gpm which will cause the pump to constantly run with absolutely no rest, will that be an issue? I understand that by limiting the gpm the amperage is also reduced however a pump that normally pumps say 50gpm being reduced to 10 gpm wont see a 1/5th reduction in amperage correct? So I can expect to see an increase in my electrical bill? A csv will cause higher pressures between the csv and the pump, could that be an issue with a pump and pipes as old as mine? Lastly assuming my system is a good candidate for a csv what size bladder tank and what model csv would I need? The inlet into my current tank is 3" but the outlet is only 2". My pump guy is pushing for a vfd but I still have most of the same concerns with that and it's a more costly system that isn't very reliable. Any help would be greatly appreciated. Thank you.