Agriculture Reference
In-Depth Information
and can develop pressures up to 250 psi. The 1.5
to 3 horsepower engine is
usually air-cooled. The tank size ranges from 12 to 18 gallons. The spray
mixture may be either mechanically or hydraulically agitated.
C.
LARGER POWER-DRIVEN SPRAYERS
1.
Low-Pressure Sprayers
These sprayers are designed to distribute dilute liquid pesticides over large
areas. They are most often used in agricultural, ornamental, turf, forestry,
aquatic, regulatory, and right-of-way pest control operations. They deliver a
low to moderate volume of spray—usually 10 to 60 gallons per acre—at
working pressures ranging from 10 to 80 psi.
These sprayers are usually mounted on tractors, trucks, or boats, but some
are self-propelled. Roller and centrifugal pumps are most often used and pro-
vide outputs from 5 to more than 20 gallons per acre. Tank sizes range from
50 gallons or less to 1,000 gallons. The spray material is usually hydrauli-
cally agitated, but mechanical agitation may be used.
Figure 8.9
Low-pressure sprayer commonly used by lawn services to apply
pesticides and fertilizers. These sprayers are used to apply chemicals to several
lawns before refilling is necessary (EPA,
Applying Pesticides Correctly
).
