18
FineCoat Split-Gun
GB
Preparing the coating material
Choosing a projector set
4.
Preparing the coating material
Observe the manufacturer’s instructions for the use of the coating
material on the paint tin or on the technical instruction sheet.
4.1
Coating material purity
An absolute pre-condition for the trouble-free operation of the fine-
spray system is that the coating material is uncontaminated. If you
have doubts as to the purity of the coating material, we recommend
that you first filter it through a fine sieve.
4.2
Material reduction/projector set
chart
Before spraying, the material being used must be thinned with an
appropriate solvent and the proper projector set must be installed. It
is always best to follow the material manufacturers recommendations
and thinning procedures.
• Use a viscosity cup (P/N 0153165). Dip the cup into the
material and remove it. Use a watch or clock to time how
long the material drains from the cup in a continuous stream.
Once the continuous stream breaks, stop timing and refer to
the table below. Add the appropriate solvent and continue
testing until the proper thickness is reached for the type of
material you are using.
Coating material
Viscosity DIN-s
(4 mm DIN cup)
Nozzle set
No.
Solvent-based
lacquer paints
15 - 45
3 - 4
Water-soluble
lacquer paints
observe
manufacturer's
instructions
4 - 5
Wood preservatives
(scumble, mordants,
etc.)
undiluted
2-3
Multi-color effect
materials, multi-color
paint
observe
manufacturer's
instructions
6-7
Texture and effect
paints
observe
manufacturer's
instructions
5-6
5.
Choosing a projector set
Your HVLP spray gun should be fitted with the proper projector set
for the type of work you will be performing. A projector set consists
of a needle assembly (Fig. 6, item 1), a fluid nozzle (2), and an air cap
(3).
i
Make sure that the air cap, the tip and the needle
have identical markings.
1
2
3
You should choose a projector set based on two things: the type of
material to be sprayed and the finish desired.
The chart on the previous page should help you to make the right
choice.
5.1
Changing a projector set
1. Remove the air cap ring (Fig. 7, item 1), air cap (2), and spring
plate (3).
3
1
2
2. Remove the fluid nozzle.
3. Separate the gun head from the gun rear (see instructions on
page 17).
4. Remove the needle.
Attention
If the needle does not slide out easily, loosen the
packing nut to prevent the needle or packing from
being damaged.
5. Install the new projector set in reverse order.
