Flood nozzles are popular for applying suspension fertilizers
where clogging is a potential problem. These
nozzles produce large droplets at pressures of 10 psi
to 25 psi. The nozzles should be spaced closer than
60 inches apart. The nozzle spacing, orientation, and
release height should be set for 100 percent overlap.
Nozzle spacing of 30 inches to 40 inches produces the
best spray patterns. Pressure influences the spray patterns
of flood nozzles more than fan nozzles. However,
the spray pattern is not as uniform as with the fan nozzles
and special attention to nozzle orientation and correct
overlap is critical. Besides fertilizer suspensions,
these nozzles are used with soil-incorporated herbicides,
pre-emergence without contact herbicides, and
with spray kits mounted on tillage implements.
Flood nozzles are designated “TK” or “TF” by Spraying
Systems Co., and “D” by Delavan AgSpray. The
value following the letters is the flow rate divided by 10
at a rated pressure of 10 psi. For example, TK-SS2 and
D-2 are flood nozzles that apply 0.2 GPM at 10 psi.