Graco Inc 216-119, 307-434 User Manual

Parts
WARNING
Before cleaning the gun nozzle or attempting to service the gun or other components, always turn off the high
voltage first, then shut down paint pump and trigger gun to relieve fluid pressure.
Grounding All components of the system, except the gun and paint hoses, must be electrically grounded. Be sure the
tric
power circuit is properly grounded.
Be sure your gun is not grounded. paint hoses to gun only, and be sure your supply pump and the object you are painting are-grounded.
Use un$rbunded r
elec-
Be sure your installation complies with all applicable local codes.
ALWAYS use the lowest pressure possible when
flushing and use a grounded metal waste container.
When flushing, avoid conductive solvents, if possible.
Be sure to turn off H.V. Power Supply before flushing,
and to remove all solvent from gun before turning on
high voltage.
Operating Never use or store solvents in the spray area.
All conductive objects within 10 ft (3 m) of the gun must be electrically grounded.
The object being coated must be grounded.
How The Elecnostatic Automatic Air Spray Gun Works A transformer supplies high voltage current through the
cable to the gun’s ionizing electrode, where the trostatic field is developed. The pump supplies paint
Be sure your installation complies with Federal, State and local codes for the installation of electrical apparatus in a Class 1, Divisions 1 and 2 Hazardous
Location. The particular type and size system for your operation
will have to be custom designed for your needs. For a correctly sized system, contact the System Division, Franklin Park, Illinois.
Mount the gun on an insulated stationary support or
reciprocator arm.
The spray gun has a mounting hole to fit a 0.5 in.
(13
mm) diameter rod. Use a mounting fixture which allows adjustment of the spray pattern direction and distance from the work.
Grace
elec-
Finishing
NEVER IMMERSE THE SPRAY GUN IN SOLVENT OR OTHER LIQUID.
Keep work hangers and conveyor equipment clean so
work pieces are well grounded.
through the hose and gun, where it is electrostatically charged as it passes the ionizing electrode. The charged
paint is attracted to the grounded work piece, wrapping
around it and coating surfaces indirectly.
hose from the solenoid valve to the gun’s cylinder air inlet. Connect an air supply line to the
l/4”
npt(m) atomizing air inlet.
BEFORE CONNECTING FLUID LINES, BLOW THEM OUT WITH AIR AND FLUSH WITH SOLVENT. BE SURE THAT THE SOLVENT YOU USE IS COMPATI­BLE WITH THE MATERIAL TO BE SPRAYED.
Connect a fluid hose to the paint supply pump’s outlet and to the gun’s
Install fluid tip in gun. Be sure fluid pressure is relieved
and high voltage turned off before installing tip.
Recommended Hose Sizes (General Purpose)
O-10 ft (O-3 m)
lo-35 ft (3-l 1
35-100ft
100-200 ft
I
3/8
npsm fluid inlet.
MATERIAL
m)
ill-30m) l/2”
(30-61 m)
l/4”
l/4”
3/8” ID 3/4” ID
npt(m)
ID
ID
I
Install a normally closed, 3-way air solenoid valve in the cylinder air supply line. BEFORE CONNECTING AIR LINES BLOW THEM OUT TO REMOVE METAL CHIPS AND OTHER FOREIGN PARTICLES. Connect an air
Adjust the system’s control device so the gun starts spraying just before the spray meets the workpiece, and stops as soon as it is past.
The gun requires a minimum of 30 psi (2 bar) air pressure to the cylinder.
Fluid Control
Adjust the fluid flow to the proper rate, using a fluid
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regulator installed in paint line. It is best to adjust flow rate with a fluid regulator.
Spray Pattern Control Turn air adjusting screw wide flat spray pattern or clockwise to decrease to a
round pattern.
O-50 ft (O-15 m)
50-100
100-200
ft ft
(15-30 m)
(30-61 m)
AIR
(36)
counterclockwise for a
l/4”
ID
5/16” ID
3/4” ID I
NOTE: When increasing to a wide, flat pattern,
Direction of spray pattern (horizontal or vertical) is changed by loosening lock ring and turning air cap to the desired position. TIGHTEN LOCK RING HAND TIGHT. DO NOT OVERTIGHTEN.
Normal Spray Pattern
.::>:0Proper adjustment will grve a spray pattern shaped
## Iike this. $$:i:
Improper Spray Patterns
increase supply of fluid to gun to maintain
same coverage over larger area.
$:::.
Connect high voltage cable to the high voltage adapter
(44.
When all adjustments are made, -trigger air, atomizing air, fluid pressure, and fan pattern,-you can turn on
the high voltage and begin operation.
Care of Gun
Good housekeeping is important. Clean the gun and work area daily. A buildup of conductive residue on
either exterior or interior surfaces of gun may interfere with proper operation.
Flush out the gun with an approved solvent at the end of the work day. Wipe the outside of the gun with an approved gun cleaner. Remove the air cap and clean it. If ionizing wire of needle (41) is bent after cleaning, straighten wire so that it is centered in fluid stream. For an approved solvent or gun cleaner, see your local sup­plier or Grace Branch. Also, refer to OSHA 29 CFR
1910.107(g)(5).
Heavy on top or bottom, right or left. Caused by paint buildup on air cap or fluid tip, partially plug-
ged air holes or fluid tip. To remedy, clean the cap
or tip.
&$
Heavy in the center. Caused by too much, or too
@$
thick material. To remedy, reduce flow by
0
<is?
ducing fluid pressure or thinning the paint.
Split pattern. Caused by insufficient paint, or too much air pressure. To remedy, increase fluid pressure or reduce air pressure.
Make sure the H.V. power supply electricity is
turned off before connecting or drsconnectrng the
high voltage leads at guns or junction arm.
I
TROUBLESHOOTING CHART
WHAT’S WRONG
Fluid needle packing nut leakage
Air leakage from front of gun
Fluid leakage from front of gun
Spitting or fluttering spray
Defective spray pattern “Orange Peel” finish Streaks in finish Runs or sags in f Excessive spray Fluid won’t corn
WARNING
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Cleaning
After each spraying operation, turn off the high voltage power supply, and solvent flush until all remaining paint is removed from hose and gun.
re-
If air cap needs cleaning, remove and soak in clean compatible solvent (not over 15 minutes) and scrub with a fine bristled brush. To clean out holes in air cap, use a toothpick or other soft implement.
Never use metal instruments to clean holes in air
must be turned off. Before removing air cap or spray tip, shut down paint pump and trigger gun
worn packing Air valve not seating properly
Fluid needle not seating properly Fluid low
Loose fluid tip or damaged seat Loose air cap, dirty or damaged fluid nozzle or air cap Needle worn or damaged Too much air pressure
Insufficient air pressure
Poorly mixed and/or strained fluid
Fluid thinned out too much
Improper thinner
entire gun in
Clean,lubricate,service Loosen packing nut,
clean
or replace Check fluid supply Tighten,clean,replace
Tighten,clean,clear replace
Replace Use least necessary Increase air pressure Properly mix and
strain
Properly thin fluid Use proper thinner
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