GUN HANDLING
The first requirement for a good resultant finish is the
proper handling of the gun The gun should be held
perpendicular to the surface being covered, and moved
parallel with it. The stroke should be started before the
trigger is pulled and the trigger should be released before
the stroke is ended. This gives accurate control of the
gun and material.
The distance between gun and surface should be 6 to 12
inches depending on material and atomizing pressure
The material deposited should always be even and wet
Lap each stroke over the preceding stroke to obtain a
uniform finish.
NOTE: To reduce overspray and obtain maximum
efficiency: always spray with the lowest possible
atomizing air pressure.
Spray width adjustment. Turn right for round, left for fan.
Fluid control screw. Turn to right to decrease flow, left to increase
As width of spray is increased, more material must be allowed to pass through the gun
to obtain the same coverage on the increased area.
The spray pattern of the gun is variable from round to flat
SIPHON SPRAYING
with all patterns in between.
Set atomization pressure at approximately 50 psi for
lacquer and 60 psi for enamel. Test spray.
If
the
spray is too fine, reduce the air pressure or open fluid
control screw. If the spray is too coarse, close the fluid
control screw. Adjust the pattern width and repeat
adjustment of spray if necessary
PRESSURE SPRAYING
After selecting correct size fluid orifice, set fluid pressure
for desired flow.
Open atomization air and test
spray. If spray is too fine reduce air pressure. If spray
In normal operation, the wings
is too coarse, raise air pressure.
Adjust pattern
on the nozzle are horizontal as
width and repeat adjustment of spray.
illustrated here. This provides
a vertical fan shaped pattern
Keeping fluid control screw in open position will reduce
which gives maximum coverage
fluid needle wear.
as the gun is moved back and
NOTE: To reduce overspray and obtain maximum
forth parallel to the surface
efficiency, always spray with the lowest possible
being finished.
atomization air pressure
2