Environmental Engineering Reference
In-Depth Information
.
hoses and a boom, which connect the tank and pump to the nozzles;
.
pressure gauges and regulators, which monitor the spray system;
.
nozzles, which break the liquid into spray droplets.
Of all these components, the nozzles are the most important, and the
purpose of all other components is mainly to ensure proper operation of
the nozzles. A nozzle has four major parts: (i) the nozzle body; (ii) strainer
(screen); (iii) cap; and (iv) tip (Fig. 11.4). Successful spraying depends on
correct selection of nozzle type and size. Nozzles come in three basic
types, which deliver liquid in the shape of a solid stream, a flat fan or a
cone. In addition each nozzle can apply liquid in a narrow, regular or
wide-angle patterns. In turf-grass situations, the principal type of nozzle
is the 80
) nozzle tips are especially useful in
windy locations subject to spray drift. Nozzles should be kept clean, and
the tips should be inspected before each use.
Hand or back-pack sprayers can be used to treat small or hard-
to-reach areas (Fig. 11.5). Hand sprayers use compressed air to force the
spray liquid through a single or multiple nozzles. The capacity of hand
sprayers generally ranges from 5 to 20 l.
8
flat fan. Wide-angle (110
8
Granule spreaders
The most common devices used to apply granular pesticide formulations
are drop (gravity) spreaders and rotary spreaders, already discussed in
Chapters 4 and 5. Both types normally consist of three main components:
Application rate/min
Nozzle tip material (vinyl, steel)
Spray delivery angle
Cap
Tip
Nozzle body
Strainer
Fig. 11.4. The nozzle is the most essential component of the sprayer.
Search WWH ::




Custom Search