Table of Contents
Advertisement
The AGN gun operation is different to models that have a needle valve to control the coating material flow. To shut
coating material flow off, air pressure must be maintained on the diaphragm (6) to seal against seat (5). To prevent
coating material leaks from the nozzle the regulated diaphragm air supply pressure 'A' must be at least 0.5 bar (8
lbf/in2) higher than the coating material supply.
Caution: To prevent accidental discharge of coating material always turn off and release coating material pressure
when the gun is not in use.
Mix, prepare and filter the coating material to be sprayed to the manufacturer's instructions.
1.
2.
Adjust the spray gun control and regulate air and coating material pressures before turning on the air and
coating material supplies.
2.1.
Fan pattern valve (13). Turn adjusting screw to fully open position, by turning counter- clockwise.
Regulate the atomising air supply 'B' pressure to 4 bar (60 lbf/in2).
2.2.
Adjust diaphragm air supply pressure 'A' to 2 bar (30 lbf/in2).
2.3.
2.4.
Regulate coating material pressure to 1 bar (15 lbf/in2).
3.
Turn on atomising and diaphragm air supply to the spray gun before turning on coating material supply.
Test spray by operating atomising and diaphragm air control valves,
Test Spray
1.
2.
Stop spraying
3.
4.
If the finish is too wet or dry adjust the coating material supply pressure until the desired pattern is achieved.
Caution: Remember to increase the diaphragm air pressure if the coating material pressure is increased.
If the atomisation is too coarse increase the air pressure, if too fine reduce the air pressure.
The recommended spray distance is 150-200 mm (6" – 8"). The spray width can be reduced from fan to round by
turning valve (13) clockwise
Flushing the system:
Turn off atomising air 'B' and coating material 'C' supplies and relieve pressures.
1.
Caution: DO NOT turn off diaphragm air supply 'A'.
2.
Replace coating material with a suitable solvent, reduce pressure and turn on supply.
3.
Remove air cap, operate the gun with diaphragm control valve, and do not turn on atomising air supply. Flush
system until clean.
Clean air cap by immersing in solvent, brush or wipe clean. If any holes in the air cap are blocked use a toothpick
or broom straw to remove the obstruction. Never use a steel wire or hard implement which will damage the air cap
and result in a distorted pattern
Note: Order numbers shown in parts list for figure 1 with suffix '-K5' etc. at the end of the order No. indicates a kit of
parts. Example JGD-14-K5 is a kit of five seals.
Caution: Always ensure that the fan air control valve is in the fully open position by turning the screw (13) counter-
clockwise before fitting the valve assembly to the gun body and when removing the nozzle and baffle.
NOZZLE (2) AND BAFFLE (3).
Turn screw (13) counter-clockwise. Remove parts in the following order (1, 2, 3 and 4). Replace any worn or damaged
parts. Reassemble in reverse order.
Recommended tightening torque for nozzle (2), 25-27 Nm (221 - 239 lbf in).
SEAT (5) or DIAPHRAGM (6).
Remove screws (9), top plate and diaphragm (6). Unscrew seat (5) using a 1/4" hexagon key. Replace worn or
damaged parts. Reassemble in reverse order. Recommended tightening torque for screws (9), 4 Nm (35 lbf in).
Note: Protective diaphragm AGN-8 (see accessories) is fitted between the gun body and the rubber diaphragm (6) to
prevent solvent based coating material contacting the rubber diaphragm.
'O' RING (12).
Turn screw (12) counter-clockwise and unscrew valve body . Replace '0' ring and reassemble in reverse order. Turn
screw (12) counter-clockwise before fitting valve assembly to gun body.
© 2015 Finishing Brands UK Ltd
Atomising air 'B'
Diaphragm air 'A'
Diaphragm air 'A'
Atomising air 'B'
.
Preventative Maintenance
Replacement of parts
.
Operation
ON
OFF
ON
OFF
7
Advertisement
Table of Contents
