Canadian Finishing & Coatings Manufacturing Magazine January/February 2022 - 36

INDUSTRIAL FINISHING: MANUAL SPRAY GUNS
SAMES KREMLIN
Nanogun Airspray unit.
" In the atomization process, " says the company, " distinction
is based on the pressure used: low-pressure (0.7 bar, HVLP),
medium pressure (1.3 bar, HVLPplus) and conventional (highpressure
air atomization at 4 to 6 bar). "
The source of energy for the atomization, Walther adds, is the
pressurized air entering the pistol through the air connector. The
amount of air is controlled by an air volume regulator while the
width of the spray jet is controlled at the round and broad spray
regulator.
To initiate atomization, the trigger is first retracted slightly.
This opens the air valve (poppet valve) built into the air
regulation system, and the path for the air is now free. When the
trigger is pulled further, the material needle valve retracts from
the material nozzle. The path for the material is also free.
Matching the pattern of the spray jet to the
object being painted is handled with infinite
regulation between round and broad spray. The
application speed will have to be matched to
the spray width. When the round/broad spray
regulator is opened, pressurized air is passed
through the two horns on the air cap; this air
broadens the round spray.
The regulating screw is closed when the
round spray pattern is desired. Additional
parameters (such as material quantity) can be
determined by selecting the nozzle size.
Nordson's Trilogy air-assist airless
(AAA) gun offers separate round and flat
jet adjustments for superior levels of spray
versatility. An external adjustable needle
seating and rear paint needle can be removed
easily for maintenance, and what Nordson
calls " exceptionally low trigger force " reduces
operator fatigue. Lightweight, balanced design
enhances handling and comfort
The AAA gun uses proprietary injector
technology that Nordson says produces fine
atomization and excellent part finish. There is
a spray pattern adjustment knob to provide for
a superior level of spray versatility.
There is also an externally adjustable
packing cartridge and rear paint needle
removal. These provide easy maintenance.
DeVilbiss' FLG-5 manual spray guns are low cost spray
units for use with a wide range of general industrial paints and
materials. The FLG-5 range employs DeVilbiss' Trans-Tech
atomization for paint saving efficiency.
This, the company states, offers a superb finishes plus
compliance with EPA legislation and similar regulations within
Canada. There is a lightweight, strong, cast aluminum gun
body; an ergonomically shaped gun handle for balance, grip and
comfort; a precision-engineered brass air cap; and stainless steel
fluid tips and needles for long service life.
36
www.cfcm.ca
Graco FinishPro HVLP
manual gun.
This budget range of spray guns is available as spray gun kits in
suction and gravity versions. There is a pressure spray gun option
for use on larger areas requiring fast coverage, without the added
downtime of refilling small cups.
With all these models on the market, the shop needing manual
spray capabilities is not short of options today. The perfect gun
will never exist, but the selection currently available ensures that
it is always possible to find the one that works for any particular
paint shop.
http://www.cfcm.ca
Canadian Finishing & Coatings Manufacturing Magazine January/February 2022

Table of Contents for the Digital Edition of Canadian Finishing & Coatings Manufacturing Magazine January/February 2022
