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The Nozzle Assembly
The nozzle assembly is located at the end of
the handgun wand. It is composed of a
nozzle base, internal o-ring, Teflon ring,
cover, external o-ring, and a hood (see
Diagram 5). To access nozzle components,
just unscrew the nozzle cover by hand.
In order to optimize nozzle life and achieve
maximum spray efficiency, the nozzle must
be properly maintained. Always rinse the
handgun out with clean soapy water after
every spray, and establish maintenance
intervals to disassemble and clean the
nozzle. You may wish to purchase tank
cleaner, which cuts hard water scale and
chemical deposits from the electrode and
internal component of the gun. Your nozzle
maintenance schedule will vary depending on
the types of chemicals used and adherence
to pre and post spray checks, In general it is
sufficient to thoroughly clean nozzles every
50 hours. If heavy loads of wettable powers
are used, the cleaning schedule should be
sooner.
Pre-Spray Check
I. Inspect Nozzles
Check nozzle cover to make sure it is on
hand tight (do not over tighten or use a
wrench). Make sure the hood is seated firmly
to the nozzle base and against the external o-
ring.
II. Preparing the Tank Mix
If you will be spraying wettable powders it is a
good idea to use a compatibility agent with
the water and tank mix. Compatibility agents
are chemicals mixed with the water that make
mixing easier and keep heavy concentrations
uniformly in suspension.
Diagram 4: The Nozzle Assembly
Post-Spray Check
After each spray it is essential that hoses and
handgun be flushed with clean soapy water.
This will help prevent chemical build-up that
can clog lines and nozzles. Also, it is
recommended that the nozzle exterior (black
portion of nozzle) and nozzle hoods be
cleaned with soapy water at this time.
To clean the nozzle assembly:
1. Slide the hood over the nozzle cover.
2. Unscrew the cover from the nozzle base
and remove the Teflon ring. Note: There
is a small o-ring in the nozzle around the
base of the tip, take care that it doesn't
fall off. If it does, clean it and press back
into place. Also, take care not to damage
the nozzle tip when the cover is removed.
3. Soak the ring, cover, and hood in a mild
detergent solution. Use a small brush
(soft or mild bristle) to clean the inside of
the cover and the hole through it. Also,
be sure to clean the hood. Rinse.
4. Scrub the nozzle base with the detergent
solution using a soft bristle brush. Be
sure to thoroughly clean the base cavity
and take care not to damage the nozzle
tip. Rinse and make sure the small o-ring
is in place.
5. Reassemble nozzle by placing the Teflon
ring on the base and screwing the cover
on hand tight. Next, slide the hood over
the nozzle and seat it securely against the
external o-ring.
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