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Irrigation / Ag Irrigation pump work
« on: March 01, 2015, 06:07:35 PM »
Howdy,
Great forum here...lots of things I should know more about.
I'm currently in the midst of a project here on the farm. I've currently got a well that sits about 200 feet in a valley below my farm. I pump from this well with a 40HP motor on a VFD up to the trees at a rate of about 150 GPM @170 PSI. For lots of reasons, I'm having a big tank installed at the top of the property that I will use as storage and also for ease of irrigation management. As luck would have it, there are nearly 200 trees around this tank that are irrigated with micro sprinklers (.16 GPM each) that will not have sufficient head pressure from the elevation difference of the tank. For these trees, I will need a booster pump. Something in the 40 GPM / 40 PSI range.
I spoke with my well driller/pump guys and they admitted that the smallest pump setup they deal with would be overkill for this small of a flow, but it could be done. This is would be a 'wet well' on a 3 Phase VFD. Talked about other options, but they really like the wet well pumps due in no small part to their significantly longer warranty period vs above ground pumps. Total estimated bill, $6k. I've been looking around trying to find another way. Looked at Grundfos CM / CME pumps. Even the CME with the VFD setup was 2500 or so, which looked a whole lot better than $6K. Even better still is the Grundfos CM-10. Really simple pump that I think just turns itself on and off with a pressure switch. Which brings me to this site and my question...If I have my tank plumbed directly to the pump plumbed to a Hunter irrigation control valve, would I be served well with a CSV? I anticipate controlling this irrigation block by simply directing the hunter sprinkler valve to open, having the pump turn on and then shutting the valve when the time is up. Is this a decent and practical way of doing this?
What are your thoughts about the CM pump?
Thanks in advance...
Matt
Great forum here...lots of things I should know more about.
I'm currently in the midst of a project here on the farm. I've currently got a well that sits about 200 feet in a valley below my farm. I pump from this well with a 40HP motor on a VFD up to the trees at a rate of about 150 GPM @170 PSI. For lots of reasons, I'm having a big tank installed at the top of the property that I will use as storage and also for ease of irrigation management. As luck would have it, there are nearly 200 trees around this tank that are irrigated with micro sprinklers (.16 GPM each) that will not have sufficient head pressure from the elevation difference of the tank. For these trees, I will need a booster pump. Something in the 40 GPM / 40 PSI range.
I spoke with my well driller/pump guys and they admitted that the smallest pump setup they deal with would be overkill for this small of a flow, but it could be done. This is would be a 'wet well' on a 3 Phase VFD. Talked about other options, but they really like the wet well pumps due in no small part to their significantly longer warranty period vs above ground pumps. Total estimated bill, $6k. I've been looking around trying to find another way. Looked at Grundfos CM / CME pumps. Even the CME with the VFD setup was 2500 or so, which looked a whole lot better than $6K. Even better still is the Grundfos CM-10. Really simple pump that I think just turns itself on and off with a pressure switch. Which brings me to this site and my question...If I have my tank plumbed directly to the pump plumbed to a Hunter irrigation control valve, would I be served well with a CSV? I anticipate controlling this irrigation block by simply directing the hunter sprinkler valve to open, having the pump turn on and then shutting the valve when the time is up. Is this a decent and practical way of doing this?
What are your thoughts about the CM pump?
Thanks in advance...
Matt