Smithco Spray Star 1607P (1999) Operator Manual - Manual (Page 36)

34
Spraying Procedure
NOZZLES
(
CONTINUED
)
3. D
ISPERSE THE MATERIAL IN A SPECIFIC PATT
ern that will insure even distribution of chemical across the swath
covered by the boom.
As shown (to the right) the pattern formed by flat fan (TeeJet) nozzles would show most liquid concen-
trated at the center, then tapering off where it begins to overlap with the next nozzle-approximately
1 /
3
.
The pattern of liquid dispersed by the hollow-cone (Raindrop) is more even across its width. Each nozzle
overlaps the adjoining nozzle by 100%. That is to say the area covered by each nozzle extends to the
center of the two nozzles on either side.
In order to properly develop their spray pattern, each nozzle must be the proper distance from the next
nozzle (spacing) and the proper height above the ground.
NOZZLE SCREENS (STRAINERS)
Smaller nozzles require nozzle screens or strainers to prevent clogging.
• TeeJet type nozzles size 8001 and 80015 and RF Flat Spray Raindrop Nozzles require 100 mesh
screens.
• TeeJet type nozzles from size 8002 through 8008 and RF Flat Spray Raindrop Nozzles require 50 mesh
screens.
• Raindrop Hollow Cone Nozzles Size RA-2 through RA-6 require 50 mesh screens.
• Raindrop Hollow Cone Nozzles Size RA-8 and larger do not require strainers.
• Turbo Floodjet Nozzles TF-VS2 through TF-VS3 require 50 mesh screens.
• Turbo Floodjet Nozzles TF-VS4 and larger do not require screens.
SPACING
Turf spray nozzles are normally 10" (25 cm) or 20" (51 cm) apart (some cases 30" (76 cm), depending on the
type of spray boom and type of area to be sprayed.
Very fine, level areas (golf greens and tees, bowling lawns, tennis courts, etc.) may be sprayed with nozzles
spaced every 10" (25 cm).
BOOM HEIGHT
Height is very important in permitting spray nozzles to develop their proper spray pattern. If nozzles are too
high, excessive overlap develops. If nozzles are too low, there is not enough overlapping of nozzle spray pat-
terns.
NOZZLE NOZZLE HEIGHT ABOVE
TYPE SPACING THE GROUND
80° Flat Fan 20" (51 cm) 18" (45-46 cm)
65° Flat Fan 10" (25 cm) 12" (30-31 cm)
Raindrop Cone 20" (51 cm) 18" (45-46 cm)
Raindrop Flat 20" (51 cm) 12" (30-31 cm)
Turbo Floodjet 20" (51 cm) 15" (38-39 cm)
Turbo Floodjet 30" (76 cm) 16" (40-41 cm)
Improper nozzle height or spacing prevents proper application of chemical. Some areas are under treated and
chemicals are ineffective. Some areas are overtreated with wasted chemical and possible turf damage.
Operating your sprayer at a desired speed and pressure on a hard, dry surface is a good method of checking
spraying consistency. Observe nozzles in operation, observe if the area dries evenly. If there are alternating wet
and dry streaks, raise or lower the spray boom. If the wet streaks are directly under the nozzle, the boom is too
low. If the wet streaks are between the nozzles, the boom is too high.