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1-800-446-5328 |
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Pump Sizing
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Determine the highest amount of fertilizer to
be injected during your longest irrigation cycle.
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Example: 100 gallons over a full 12-hour
period
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Convert the 12 hours into minutes 100/720 =
0.13
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0.13 x 3785 ml per gallon = 525.69 ml per
minute
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This becomes the factor in calibrating and
sizing your injection pump. Then multiply milliliters per minute x
number of minutes in one hour / milliliters per gallon, as in our example:
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525.69 ml per minute x 60 / 3785 = 8.3 gallons
per hour
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This would be the maximum amount you will be
injecting per hour. In this case, the 9-gallon per hour pump would be
sufficient to do the injection, but would be at the maximum side of the
pump. To find what that percentage would be, you would take the 8.3
gallons per hour and divide it by the maximum flow of your pump (9 gph), and
would get .92, meaning you would be running your pump at 92% of it's
capacity. On the minimum side of this pump, you could go down to .9
gallons per hour.
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The main point is to try to optimize the pump
for what you are trying to accomplish with your applications. In this
same case, if you were to use a 30 gph pump, you would be running at 27% of
it's capacity. Although this pump would be operating within the
parameters of the pump, it would be over-kill in sizing, but could still be
used.
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| A. |
Total Amount (in gallons)
to be applied |
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| B. |
Total Amount of Time to be
applied |
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| C. |
Total Minutes (B x 60) |
________ |
| D. |
Divide A by C and multiply
by 3785 |
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| E. |
Multiply D x 60 divided by
3785 |
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| F. |
Divide E by the maximum
flow of your pump* |
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*This will give you the
percentage setting of your pump. |
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| Download this Pump Sizing Worksheet in Adobe Acrobat portable document format (.pdf) for viewing
and/or printing off-line by clicking here.
If you don't have the Adobe Acrobat Reader, get your free copy by clicking
on the graphical link below. |
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Irrigation
Injection Technologies
A Division of Agri-Inject, Inc.
5500 East Highway 34
Yuma, CO 80759
1-800-446-5328 |
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