NP2540
Fertilizer Rates
103
2019-04-12
417-459M
Operating Instructions:
1. Maximum allowed system pressure is 100 psi, and
the maximum allowed liquid temperature is 140F,
2. The adapters and body of the standard flow
monitors are made of Polypropylene and PVC. You
must verify that the fluids you plan to use are
compatible with these materials. Note that for the
fumigant flow monitor models, PMP
(Polymethylpentene, or “TPX
®
”) is used instead of
PVC.
3. During use, the balls in each column should be
approximately even. If they are not, check the lines
for blockage or restriction.
4. If the balls are at the very top of the monitor during
operation, it is recommended to change the ball to
lower its operating level in order to avoid flow
restriction from the ball itself.
5. Various types of liquid fertilizer will give different
flow values than what is shown in the flow rate
table. You may use the conversion table to adjust
the flow values according to your fertilizer’s
lbs/gallon measurement, but it may be best to
experiment with different balls to determine which
one works best in your application.
Table Example:
•
For fertilizer weighting 11 lbs/gal, the conversion
factor is 0.87
•
If you want to run 0.47 GPM through each monitor,
you need to divide 0.47 by 0.87 (=0.54)
•
Then you choose from the Flow Rate Table the best
fit to the new number - which is the blue glass ball.
The ball should hover at approximately level #5.
Storage and Cleaning:
1. After use, flush the monitor columns for a few
minutes with a solution that will neutralize the liquid
last used (refer to that manufacturer’s instructions).
The columns may be disassembled to ease
cleaning.
2. To protect monitor columns from freezing, drain
completely after flushing.
3. Although the flow monitor’s materials have an
additive to increase UV resistance, to prolong their
life it is suggested that you protect the flow monitors
from sunlight during storage.
End of used text from CDS-John Blue Company
publication 12-M-49 Rev. 7/2012.