Spray Adjustments - Graco Reactor 2 Hydraulic Operation

Spraying
9. Check luid pressure gauges (GA, GB) to
ensure proper pressure balance. If imbalanced,
reduce pressure of higher component by
slightly turning PRESSURE RELIEF/SPRAY
slightly slightly
valve for that component toward PRESSURE
RELIEF/CIRCULATION
balanced pressures.
SA
10. Open gun luid inlet valves A and B.
Fusion Fusion Fusion
NOTICE NOTICE NOTICE
To prevent material crossover on impingement
never open luid manifold valves or
guns, never never
trigger gun if pressures are imbalanced.
50
until gauges show
GA GB
SB
Probler Probler Probler
11. Disengage gun piston safety lock.
Fusion
Fusion Fusion
12. Pull gun trigger to test spray onto cardboard. If
necessary, adjust pressure and temperature to
get desired results.
Spray

Spray Adjustments

Spray Adjustments Adjustments
Flow rate, atomization, and amount of overspray are
affected by four variables.
• Fluid Fluid pressure Fluid pressure setting. pressure setting. Too little pressure results setting.
in an uneven pattern, coarse droplet size, low
low, and poor mixing. Too much pressure results
in excessive overspray, high low rates, dificult
control, and excessive wear.
• Fluid Fluid Fluid temperature. temperature. temperature. Similar effects to luid pressure
setting. The A and B temperatures can be offset to
help balance the luid pressure.
• Mix Mix Mix chamber chamber size. chamber size. Choice of mix chamber is based size.
on desired low rate and luid viscosity.
Clean-off air air adjustment. adjustment. Too little clean-off air
• Clean-off Clean-off air adjustment.
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
Probler Probler
334945C