![]() Move down the seven gpa column, and you’ll encounter a value close to 13 mph five times – the yellow nozzle at 90 psi, the lilac nozzle at 60 psi, the blue nozzle at 40 psi, the dark red at 30 psi, and the red at about 25 psi. Fig 6: Five solutions for the question, “which nozzle to apply 7 gpa at 13 mph?” If a nozzle can be operated between 30 and 90 psi, for example, the corresponding speeds are listed in the same rows in the volume column.įor example, say you want to apply seven gpa and think that 13 mph would be a good average travel speed. These columns can be used to work out a nozzle’s travel speed range. Look for a nozzle size that delivers this pressure at your expected travel speed. For an air-induced nozzle, the range is usually from 30 to 90 psi, so the middle is 60 to 70 psi. ![]() Try to operate at a spray pressure that’s in the middle of the nozzle’s operating range. ![]() 5: Nozzle flow rate chart with volumes at top makes it user friendly. To the left, the nozzle size and corresponding operating pressures are now visible. Pick a water volume at the top and follow the column underneath this value to find a speed range you’re comfortable with. We’ve therefore re-worked the table to make more sense (Fig. Travel speed, decided second, has more flexibility. Usually, an operator decides on an application volume first, and this decision is not very flexible. The format of the chart can be confusing because it doesn’t follow a modern sprayer operator’s priorities. ![]() Fig 4: Typical nozzle flow rate chart, with speed at top and volumes in body. ![]()
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