Spray Adjustments - Graco Reactor 2 Series Operation

Spraying
10. Open gun fluid inlet valves A and B.
Fusion
NOTICE
To prevent crossover on impingement guns,
never open fluid manifold valves or trigger gun
if pressures are imbalanced.
11. Disengage gun piston safety lock.
Fusion
12. Pull gun trigger to test spray onto cardboard. If
necessary, adjust pressure and temperature to
get desired results.
64

Spray Adjustments

Flow rate, atomization, and amount of overspray are
affected by four variables.
• Fluid pressure setting. Too little pressure results
in an uneven pattern, coarse droplet size, low
flow, and poor mixing. Too much pressure results
Probler
in excessive overspray, high flow rates, difficult
control, and excessive wear.
• Fluid temperature. Similar effects to fluid pressure
setting. The A and B temperatures can be offset to
help balance the fluid pressure.
• Mix chamber size. Choice of mix chamber is based
on desired flow rate and fluid viscosity.
• Clean-off air adjustment. Too little clean-off air
results in droplets building up on the front of the
nozzle, and no pattern containment to control
overspray. Too much clean-off air results in
air-assisted atomization and excessive overspray.
Probler
332636C