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MAG II AUTOMATIC HVLP SPRAY GUN SET-UP INSTRUCTIONS — SPRAY INSTRUCTIONS
FLUID TIP SELECTION
Factors to consider in selecting a fluid tip for an air-
assisted airless spray gun include (1) the size of the parts
being sprayed; (2) the production line speed; (3) the
material flow rate and film thickness; (4) the viscosity of
the material applied; (5) the type of material applied; and
(6) the quality of atomization of the coating required.
The selection of a fluid tip necessary to perform a specific
spraying job is best determined through a combination of
experimentation and expert advice from your material
and equipment suppliers.
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1. Remove item (32) side port control by turning
counter-clockwise with a 9/16 wrench.
2. Install item (40) set screw into thread at the bottom
of tapered cavity of where the side port was.
3. Install item (41) side port plug into the upper part of
the threaded cavity of where the side port was.
SET UP FOR SPRAYING
Safe connection.
Verify that the gun is grounded per the automated
machine manufacturer’s recommendations.
Connecting gun to the material hose.
Gun should be connected by a suitable length of 3/8"
diameter material hose fitted with a the appropriate
connector that mounts to the 1/4" npt female thread of
the fluid inlet portion of the manifold. 1/4" diameter
hose is recommended for use with low viscosity
materials. (Fluid hoses of different composition are
available for special fluids.)
Connecting atomizing air to the manifold.
Guns should be connected by a suitable length of
5/16" diameter air hose fitted with a connector that
accommodates a 1/4" nps (m) fitting and should
connected the atomizing air port.
Connecting air cylinder to the manifold.
Connect 1/4" O.D. tubing to the air cylinder fitting
located on the manifold.
Controlling the material flow.
When fed from a pressure supply, an increase in
material pressure will increase the rate of flow. Correct
fluid tip size ensures correct material flow rate.
Adjusting the spray pattern.
Utilizing the adjusting side port control you can get a
30% range of pattern Adjustment. With the gun set up
to operate with remote fan air you can accommodate a
40% reduction in pattern width by increasing air
pressure to the fan port.
GENERAL SPRAY INSTRUCTIONS
1. Have at least 55-60 psi air pressure for the cylinder
operating air.
2. To reduce overspray and obtain maximum efficiency,
always spray with the lowest possible fluid/air
pressure that produces an acceptable pattern.
3. The air line to a three way valve should be as short
as possible for rapid operation.
4. All the air used in the gun should be dirt and
moisture free. This is accomplished by using
an oil and water extractor.
5. Shut off all the fluid and air lines to the gun if the
gun is to stand idle for any length of time. This is to
prevent build-up or accumulation of minute leaks in
the system from turning the gun on.
6. The distance between gun and surface should
be 6 to 12 inches depending on material and the
atomizing pressure. The material deposited should
always be even and wet. Lap each stroke over the
proceeding stroke to obtain a uniform finish.
7. Set the fluid pressure to achieve low pressure airless
pattern with tails approximately 300 to 500 psi.
8. Open the side port control knob.
9. Set the atomizing pressure to 5 psi and increase until
the tails have been removed from the pattern and
proper atomization has been achieved. If more than
30 psi of atomizing air is required, increase fluid
pressure instead of atomizing air. If the spraying
pattern develops tails or is not uniform, gradually
increase the air pressure as necessary to develop a
uniform spraying pattern. 14 psi is the maximum inlet
pressure for HVLP (15 psi max. for HVLP twist tip
cap), or use 20-40 psi inlet air pressure for LVMP.
The HVLP flat tip and twist tip air caps consume 8.3
SCFM air at their respective maximum inlet air
pressures. The LVMP flat tip and twist tip air caps
consume 13 SCFM at 30 psi inlet air pressure. The air
is used to assist the atomization of the coating.
10. Note: Excessive fluid/air pressure will distort the
spray pattern and produce excessive overspray. The
“hourglass” and “tails” on a spray patterns indicate
too low of fluid/air pressure or materials is too thick
or viscous. A worn or clogged tip can also cause spray
pattern distortion.
note
For HVLP spray, fan adjustment feature requires 14 psi max. of
air pressure. (15 psi max. for HVLP twist tip.) For LVMP spray,
fan adjustment requires approximately 20-40 psi of air inlet
pressure. Higher fluid pressure requires higher air inlet
pressures to accommodate pattern adjustment.
