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TR-MAN-4000
Operator's Manual - 4000 Series Traveller
Page 14 of 158
Cadman Power Equipment Limited ▪ BOX 100, Courtland, Ontario, Canada N0J-1E0 ▪ Phone: 519-688-2222 ▪ Fax: 519-688-2100 ▪ www.cadmanpower.com
Determine the retrieval rate using the sprinkler data charts, system pressure, and field I )
width. See the retrieval rate selection example below
…
Retrieval Rate Selection Example
For this example a 4000SWB traveller is fitted with a Nelson SR150 sprinkler. The
Nelson SR150 will be using a 1.34 inch ring nozzle operating at 90 psi .
Use the above information to plan for a field using 300 foot lane spacing that needs
1.25 inches of irrigation depth.
Use example Table 1 to find the GPM you will be pumping. For this example, cross the A )
1.34 inch ring diameter with the 90 psi operating pressure.
A 1.34 inch ring nozzle operating at 90 psi will irrigate at 405 GPM.
Next, use example Table 2 to look up the time it will take to cover one acre in minutes B )
by crossing the GPM from step A and the 1.25 inch irrigation depth used in this
example. If the GPM from step A does not match with one of the flow rates in example
table 2, the flow rate in example Table 2 that is closest to the GPM from step A is
chosen.
A flow rate of 245 GPM with an irrigation depth of 0.75 inches
will give a time of 68 minutes.
Use example table 3 to look up the retrieve rate you need by crossing the time needed C )
to cover 1 acre from step B with the 300 foot lane spacing.
81 minutes to cover 1 acre with a 300 foot wide lane
will give a retrieval rate of 21 inches per minute.
You must set the sprinkler up so that the 300 foot section is covered in addition to D )
enough overlap to provide adequate watering at the edge of your field.
The following charts are to be used as a guide only. Always verify the
application amount with rain gauges to confirm that your application is
correct.