Air
Spray Guns.
Please
note that we no longer sell Air spray products.
This page has been left here for information purposes only.
We
do continue to sell Airbrush and associated equipment..
As
the name suggests, these paint sprayers use air from a compressor to
atomize the paint and create the spray pattern. These guns have advantages
in that they can achieve extremely fine atomization of the paint particles
which, combined with the proper blend of paint thinners and operator
technique, give an excellent finish.
Air
Spray Gun Troubleshooting
Guide
| Symptoms |
Causes |
Remedies |
The
paint does not come out regularly, i.e., spluttering
|
1-
Insufficient paint in the pot
2- The gun is too inclined
3- The paint flow is obstructed
4- The nozzle is loose or damaged
5- The viscosity of paint is too high
6- The hole of the cover is obstructed
7- The packing gland of the needle is worn or the gland nut is loosened |
1-
Fill the pot
2- Adjust
3- Clean with solvent
4- Tighten or replace
5- Reduce the viscosity
6- Clean
7- Replace or adjust |
Irregular
spray pattern (Only on one side)
 |
1-
The hole of the curved head is partially obstructed or damaged
2- Paint or dust sticks on head conical walls and on the nozzle, or
the parts are damaged
3- (X) Paint or dust sticks on upper portion of the nozzle
4- (Y) Paint or dust sticks on lower portion of the nozzle |
1-
Clean or replace
2- Clean or replace
3- Clean (X)
4- Clean (Y) |
Semicircular
spray pattern
|
1-
(X) The air cap right hole is obstructed
1- (Y) The air cap left hole is obstructed
2- (X) Paint sticks on the right side of the air cap
2- (Y) Paint sticks on the left side of the air cap
3- The air cap or nozzle holes are damaged |
1-
Clean (X) (Y)
2- Clean (X) (Y)
3- Replace |
Irregular
spray pattern
(drop pattern)
 |
1-
Damaged nozzle
2- Excessive clearance between air cap diameter and nozzle OD
3- The air passing through the air cap holes is insufficient or the
pressure is too low
4- The pressure pushing the paint (pressurized pot operation) is too
high
5- The viscosity is too high |
1-
Replace
2- Replace
3- Increase the air volume or the pressure
4- Reduce the pressure
5- Reduce the viscosity |
Irregular
spray pattern
(narrow at the centre)
|
1-
The air volume passing through the air cap holes is excessive and
the pressure is too high
2- Paint or dust deposit between head and nozzle |
1-
Reduce the air volume and
reduce the pressure
2- Clean |
Spray
centre too full
|
1-
Too much product
2- Product too thick |
1-
Use less
2- Dilute it |
Impossible
to get a round spray
|
1-
Jet support loose
2- Jet support ruined |
1-
Close it
2- Change it |
It
does not atomise
|
1-
There is no air in the gun
2- Air control valve not open properly
3- Product regulation button not open properly
4- The hole of the cover is obstructed
5- The hole of the non-drip device is obstructed |
1-
Check the air line
2- Open the air regulation valve
3- Open the product regulation valve
4- Clean and/or replace
5- Clean and/or replace |
Product
leaking out of the nozzle
|
1-
The packing nut is too tight
2- Needle is damaged
3- Needle not aligned with nozzle |
1-
Loosen it
2- Change it
3- Check or change it |
Sagging
|
1-
Too much product
2- Product too thin
3- Bad positioning of the gun |
1-
Use less
2- Add some undiluted product
3- Keep the gun perpendicular |
Too
much atomising
(overspray)
|
1-
Too much thinners
2- Too high air pressure |
1-
Add some undiluted product
2- Decrease the air pressure |
Too
much atomisation at the edges of the spray
|
1-
Too high air pressure
2- Gun too far away from the surface to be sprayed
3- Too quick and arched in movement |
1-
Decrease the air pressure
2- Move closer
3- Slow down and keep straight in movement |
Coarse
finish, dry atomisation
|
1-
Gun too far from the surface
2- Too high an air pressure |
1-
Reduce the distance
2- Decrease the air pressure |
Finish
with an “orange peel” look
|
1-
Gun too near
2- Too low an air pressure
3- Surface oxidised or greasy |
1-
Increase the distance
2- Increase the atomisation pressure
3- Clean or degrease the surface |
