All spray equipment can and should be calibrated for maximum performance of your products with minimal waste.
We will be using a calibrated five-gallon bucket for this demonstration but you can use just about any container with a known measurement. In my opinion, it is preferable to use five full gallons when calibrating for maximum accuracy.
Bear in mind this is not an extremely detailed demonstration but it will get you going in the right direction and improve your results immediately.
We are using the UDOR KAPPA Series Diaphragm Pumps powered by a Honda GX240 8HP Electric Start Engine for this video.
1. Get your system up to desired pressure, usually just below what your system is capable of.
2. Our system in this video shares agitation PSI with Spray Hose PSI so open the agitation about halfway.
3. Start your timer and at the same time start filling the bucket. Be sure you are using the exact Lawn Wand, Green Guard Gun, JD9 Gun or whatever tool you are spraying with.
4. Your GPM, (Gallons Per Minute) results will tell you whether you need to adjust pressure up or down while maintaining good agitation and keeping your product mixed properly. Commonly, here in Florida, 4 GPM is the desired target for our type of grasses so that is where we set this Lawn and Shrub Truck at before delivery.
Something else to keep in mind is the factors that will alter your results. Two come to mind right away:
1. YOUR WALKING SPEED: Some spray techs will walk faster/slower than others putting down less/more product. It is important that the tech is pacing themselves properly for the best results.
2. THE AMOUNT OF HOSE ON THE HOSE REEL: The amount of hose on left the hose reel will change the calibration. You can gain as much as a half a gallon per minute or more by simply having the hose all the way out and off the hose reel. You may also have a kink or flat spots usually where the hose is attached to the reel greatly altering your results. It’s a good idea to inspect that area of your hose before calibrating and repair as needed for optimal flow.
Finally, be sure you understand the area you are treating. Most commonly the labels will tell you how many ounces to use per square feet of area. As always follow the instructions on the label of the products you are using and use your PIP.
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