11
Your new Binks Century Gun will give you excellent performance
as long as it is handled properly. Read over these sections before
operating the gun.
CATALYZATION
The catalyst orifice should be sized to minimize catalyst pres-
sure. Over-catalyzation can show up as a split pattern, misting
of the resin, streaking of the catalyst in the resin, or detection
of catalyst fumes. A wide range of catalyst injectors is avail-
able to accommodate your specific needs. Refer to the
Catalyst
Injector Selection Chart
for the various orifice sizes.
Catalyst fumes should be minimal. The Binks Century guns
utilize external advanced catalyzation technology, “EXACT”
which mixes all of the catalyst exiting the catalyst injector into
the resin stream.
FLUID/AIR PRESSURE OF THE RESIN/GEL-COAT
To reduce overspray and obtain maximum efficiency of the
Century gun, the fluid and air pressure should be reduced to
their lowest possible pressures that produce acceptable
atomization and finish.
Typically, for unfilled resins and unpigmented gel-coats, the fluid
pressure needed for proper atomization is approximately 200-700
psi. For filled resins and pigmented gel-coats, the fluid pressure
will be significantly higher, approximately 400-1500 psi.
Depending on your system, the fluid pressures you use will vary
higher or lower than these numbers, but they serve as a good
starting point.
Typically, the pressure setting at nozzle for the atomizing air
will be from 3 to 10 psi, although pressures up to 30 psi are
acceptable. The atomizing air is necessary for proper catalyza-
tion and therefore should not be reduced below 5 psi. Also,
depending upon the catalyst, it may be necessary to
increase/decrease the atomizing air in order to induce proper
catalyzation after determining the necessary air pressure for a
good spray pattern.
TIMING OF THE AIR, CATALYST AND
RESIN VALVES
The timing of the air, catalyst and resin valves is an important
factor in the operation of the Century gun.
The gun will appear to leak if the lag between engaging the
atomizing air and the fluid needles is unnecessarily long.
While releasing the trigger, the resin and catalyst shut off first
and the atomizing air has not shut off yet. The atomizing air
will then siphon out any remaining material in the spray tip
and/or catalyst injector. This is why it is necessary to adjust the
nuts on the resin and catalyst needles so that there exists only a
very short interval between the actuation of the atomizing air
and the fluid needles.
(continued)
OPERATING INSTRUCTIONS
REAR VIEW OF GUN
NOTE: All inlets are 1/4" male.
(For 102-2400, 102-2455 and 102-2500)
Resin
Inlet
Air Assist
Inlet
Chopper Air
Outlet
Catalyst
Inlet
Chopper Air
Inlet
1. Connect air hose to air assist inlet (53) and tighten securely.
Set regulator to provide sufficient air at nozzle (3-10#).
2. Connect high pressure airless fluid hose from the resin
pump to the resin inlet assembly (48) and tighten securely.
Set pumping source to deliver resin from 500-1500 psi.
3. Connect the catalyst hose to the catalyst inlet/filter assem-
bly (42) and tighten securely.
4. If using chopper (102-2400 gun), connect the chopper air
hose to the chopper air inlet (52) and tighten securely.
5. Loosen the two nuts on the catalyst needle (24 & 25) and
move them forward so that the trigger actuates them simul-
taneous with engagement of the resin needle. Once fin-
ished, reposition them again so that they are engaged just
as the resin needle nut is engaged when triggering the gun.
6. Assemble the spray tip assembly and the air/catalyst cap
and tighten the air/catalyst cap retainer ring (1) securely.
7. Set fluid pressure to achieve low pressure airless pattern
with “fingers”.
8. Adjust atomizing air until the “fingers” have been removed
from the spray pattern and proper atomization has been
achieved. If atomizing air seems excessive (overspray)
increase fluid pressure and reduce air. (Check pattern).
(Excessive atomizing air can impair catalyzation.)
SET-UP INSTRUCTIONS
NOTE
Century guns are considered HVLP (high volume, low
pressure). Air required for atomization is in the 3-10#
range at nozzle.
NOTE
Whenever the gun is not in operation set the trigger lock by
rotating the trigger (62) as far forward as it will go and then
rotating the locking block (68) in its upward orientation.
NOTE
The sequence of operation is: atomizing air, catalyst and
resin simultaneously.
