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| Good stuff.
So, two things:
1. With 20GPA @ 15mph, you are probably starting to feel the pinch on the flow capacity that can go through your solenoid. This isn't so much a nozzle size thing that can fix it perfectly, it is more to do with the flow being capped by the solenoids' flow capacity. Each PWM solenoid has a max flow it can do, and the aim flex II is one of the better.
- One quick small fix to get a bit more flow out of AIM FLEX II - the PWM system is spraying on 20Hz frequency (spraying every 20th of a second). One small downside to faster pulse speed is that the time that the PWM solenoid is 'almost open' and 'almost closed' doubles, so it actually chokes off the flow capacity a little bit more than if it was pulsing slower. So, the (small-ish) fix: In the monitor, for your 20GPA work, change the pulsing Hz down to 10Hz. This might give you another few miles per hour speed before the solenoid is sort of maxed out.
2. 'PE' on the forums had responded to your post as well with another way to spray 20GPA at whatever speed you wanted (less limitation of the PWM solenoid) - Effectively, in the monitor you can swap your standard spray mode to 'HIGH FLOW MODE' (HIGH FLOW MODE VP - is high flow mode with variable pressure, which is a second option as well, but a bit different).
So, in HIGH FLOW MODE, you would be using a nozzle on your bypass nozzle body position (e.g. the nozzle outlet directly under the boom) and spray out of that one AS WELL AS your PWM nozzle. So, the bypass nozzle body is not going to pulse. It is a rate controlled nozzle, so no turn comp or individual nozzle control out of it. Thus, since there is less 'control' to the nozzle, we'd generally use a much smaller nozzle for this spot. Again, the intent is to bypass some of your flow (for example, something like 1/4 to 1/3 of your total flow) through this bypass nozzle to take the edge off the flow requirements of the PWM solenoid so that you can keep your travel speed wherever you wanted it to be.
So, you'd have two options for optimal set up:
OPTION 1. Do a double-down adapter approach - Wilger part#40441-00 - If you have an 2024 or older 4450 Patriot, then the double-down adapter will have a tough time in some spots on the boom just due to how tight the frame is around the nozzle bodies. In the 2025 models and newer, Case used our newer DS41 nozzle body that is way more compact so it does fit with more clearance for the double-down adapter. (Its an altogether better body with a bunch of other changes too).
If you are doing straight Liberty with a double-down adapter, spraying 20GPA at 15mph, I'd look at something like a 110-12 nozzle size combo with two SR110-06s. The SR110-06s will be nominally coarser than the chart for a SINGLE SR110-06 as the pressure drop through the solenoid (with 2x 110-06s) is greater than the pressure drop from a single SR110-06. So just be aware the Tip Wizard app generated chart for double-down spraying will be different than a standard chart.
I attached a snapshot from the Tip Wizard app (https://web-service-1042317662767.us-central1.run.app/tip-wizard) that shows what the 2x SR110-06 would look like with the pressure drop of the solenoid with the combined flow:
So, around the 60PSI, you'd be looking at around the 9% driftable fines overall, and your coverage factor would be around the 89%. An excellent balance between drift and coverage for a contact herbicide. That being said, if you are in more drift sensitive areas or fields, it makes sense to try keep your driftable fines lower (less risk). So, just swapping your pressure down to ~45PSI brings your driftable fines down ~33% to like 6% drift. That is borderline getting pretty close to where your MR110-10 was spraying before, BUT the main difference is your coverage factor (the % < 600ยต) goes up like 50% to ~85% from 55% at around the same pressure.
So, again, you'll notice in the speed/rate chart for the combined tips that the flow and travel speeds are getting upwards of a higher duty cycle (like 80%+), you can add larger nozzles to take the duty cycle down a bit, but even if you were up to like a 110-16 size (e.g. 2x 110-08s) which is like 30% larger in size, the duty cycles go down only like 10% (as the SOLENOID is near maxed out, not the nozzles). If you were swinging to a larger 110-16 size or so, it also means that your combined pair of nozzles are going to get coarser yet as well.
OPTION 2. Do a HIGH FLOW (PWM + non-PWM nozzle) - This would not require an adapter. It would only require changing the spraying method in the monitor, and opening the manual on/off check valves on each of your nozzle bodies. By opening this manual on/off check valve it turns the module into a 10PSI check valve (like the old days before PWM).
So, for this, Tip Wizard has a separate search type in the double down menu. You'd be searching for a PWM nozzle first, with that set to whatever % of your total flow you were wanting to achieve. Ideally the PWM nozzle is spraying something like 67% of the total flow, so that you are still maintaining individual nozzle control and turn comp and all the good PWM features for 67% of the flow coming out of your sprayer.
So, for an example, if we looked at using an SR110-08 for our 'PWM NOZZLE", spraying ~67% of the nozzle flow, and then an MR110-03 for our NON-PWM nozzle flow, it might look like something like this:
SR110-08 (PWM) around the 8% drift and ~75% coverage at 50PSI and the MR110-03 at around 10% driftable fines and 93% coverage. Since the volume is split between the two, if it makes it easier, you could kinda average them together to make a better idea of total spray characteristics:
8.66% driftable fines and 80.94% 'Coverage Factor'.
Again, the perk to the setup is that you can change the nozzles freely as well. So if you wanted a bit of a coarser bypass nozzle, you could swap it to a DR110-03 + SR110-08 combo, which would change it to something like: 7.3% driftable fines and 77% coverage factor.
Alternatively, you could swap the 110-03 to a smaller 110-025 nozzle size as well, which would bump up the pressure you'd be spraying at, if that was something you wanted as well. Again, lots of options (probably too many options. Haha)
Hopefully that might make sense. Again, comparing as much as we can with good numbers gives a better idea of how much better one way than another one.
 (20GPA_PWMandNonPWM_SR110-08+MR110-03 (full).png)
 (20GPA_SR110-06x2 (full).png)
Attachments
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 20GPA_PWMandNonPWM_SR110-08+MR110-03 (full).png (123KB - 1 downloads)
20GPA_SR110-06x2 (full).png (125KB - 1 downloads)
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Spray Tips for Liberty
