DeVillbiss Air Power Company SP-100-E - Manual (Page 3)

3 — Eng
External Mix - The air and material are mixed outside
the air cap. This type of cap is best suited for quick
drying paints, such as latex, lacquers, etc.
Internal Mix - The air and material are mixed inside the
air cap. This type of cap is normally used for thick paint
where fast application is desired and where quality of
finish is less important. Internal mix must be used with
pressure feed set-up.
Fluid/Fan Adjustment- To increase volume of mate-
rial, turn fluid needle adjusting screw counterclock-
wise. To decrease, turn clockwise. Increasing volume of
material will also increase fan pattern size when using
a fan pattern air cap.
AIR CAPS
To change air caps, turn the retaining ring counter-
clockwise and remove from gun.
Remove air cap and replace with different cap.
Reassemble in reverse order.
NOTE
Matched air cap and fluid tip combina-
tions are recommended for optimum per-
formance. The fluid tip is removed with a
1/2" socket. When assembling, be sure
the plastic baffle is in place and the tip is
not cross threaded or over tightened (160-
220 in.-lbs. Torque).
GENERAL INFORMATION
OPERATION
1. Shut off fluid flow through gun by turning fluid
needle adjusting screw clockwise as far as it will go.
Do not force.
2. Keep the air pressure as low as possible. Set pressure
to 40 psi as a starting point.
RISK OF INJURY OR EQUIPMENT DAMAGE.
DO NOT EXCEED 50 PSIG AT ANY TIME
3. Open (turn counterclockwise) air valve assembly
until the first thread is flush with the back of gun. This
is the full open position.
4. Hold the trigger back and gradually open the fluid
needle adjusting screw until a desired pattern is
obtained.
5. Trigger the gun quickly, one second on-off. Spray a
small test pattern.
6. If the gun sprays too fast (runs or sags), lower the air
and fluid pressure. If too slow, increase pressure.
Adjust to balance pressure.
When using internal mix air cap, begin with the same air
and fluid pressure.
PREPARATION FOR SPRAYING
This spray gun is shipped completely assembled, and
set-up spraying. Installation is accomplished by con-
necting an air line to the air inlet adapter.
This spray gun should be flushed with solvent prior to
spraying with paint.
The fluid needle packing in this gun may be loose when
received. Tighten the packing retainer until it grabs and
holds the fluid needle , then back off the packing retainer
(approx. 1/4 turn) until the fluid needle is free to travel
into the fluid tip.
Be sure the surface to be sprayed is dry and free of all
dirt, grease, oil and loose paint. Mix and prepare the
paint according to the manufacturer's instructions. The
use of a viscosimeter can be very helpful. Strain the
material to be sprayed through a 60 to 90 mesh screen or
equivalent.
To use a quick disconnect, remove the air hose adapter
and install a 1/4" NPT quick disconnect adapter into the
handle of the gun body. Set air pressure at 40 psi as a
starting point and follow the safety precautions before
you begin.