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Set-up Calculations
Choosing Tips and Orifices
To determine which tips or orifices will best suit your applications, you should use either the “Aircraft Calibration” or the “Aircraft Calibration—Metric” spreadsheets.
When you’ve entered your airspeed, swath width, application rate and number of nozzles, the two right-hand columns will show a pressure number and either “Not Recommended” or “Pressure OK”. CP’s should be used with a minimum of 30 psi. The left-hand column shows tips and orifices. The first part of the spreadsheet shows flat fan tips. Scroll down to see orifices for either CP’s polypropylene or stainless steel bodies which meet the pressure minimums. For CP-03’s and CP-07/09’s, the left hand column may show “2/3 - .078/1/3-.125”. This simply means that, instead of using all one orifice, you need to use 2/3 of your nozzles on the .078 orifice and 1/3 of them on the .125 orifice to achieve the correct flow rate at a workable pressure. A combination of flat fan tips sizes may be used, also, but are not calculated automatically.
Once a selection of set-up options is determined, it is very important to refer to the spreadsheets which calculate droplet spectrum. The final choice of set-up should give the flow rate needed with an appropriate droplet spectrum.
Click here for “Aircraft Calibration”.
Click here for “Aircraft Calibration—Metric”.
