IMPORTANT:
To ensure that this equipment reaches you in first class condition, protective coatings, rust inhibitors etc., have
been used. Flush all equipment through with a suitable solvent before use to remove these agents from the material passages.
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). The simplest method of gun
control is to use a normally open three way valve for the diaphragm air supply ‘A’ and a normally closed three way valve for the
atomising air supply ‘B’. These valves can automatically or manually operated.
To prevent unatomised coating material spoiling the finish the sequence of control valve operation should be;
To Spray
1. Atomising air ‘B’
ON
2. Diaphragm air ‘A’
OFF
Stop spraying
3. Diaphragm air ‘A’
ON
4. Atomising air ‘B’
OFF
The timing of these valve operations will depend on the speed of gun operation required, for some applications the atomising
air supply could be continuously ON and the diaphragm air control valve operated when spray is required.
CAUTION:
In case of an air supply failure it is recommended that a fail-safe valve is fitted to the coating material supply to
prevent accidental spillage.
Separate filtered regulated air supplies are required for atomising and diaphragm operation.
Mount the gun on a 12.5 mm (
1
¼
2
") diameter rod and secure with screw (7).
Hosing
1. Connect a 6 mm outside diameter nylon tube to the push-in connector ‘A’ via a three way normally open valve.
2. Attach atomising air supply hose to connector ‘B’ via a three way normally closed valve.
3. Attach coating material hose to connector ‘C’ from a pressure feed source.
Recommended hose sizes,
up to 10 metres long.
Atomising air supply
8mm (
5
/
16
") internal diameter.
Coating material supply 9.5mm (
3
/
8
") internal diameter.
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/in
2
) 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.
1. Mix, prepare and filter the coating material to be sprayed to the manufacturer’s instructions.
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.
2.2. Regulate the atomising air supply ‘B’ pressure to 4 bar (60 lbf/in
2
).
2.3. Adjust diaphragm air supply pressure ‘A’ to 2 bar (30 lbf/in
2
).
2.4. Regulate coating material pressure to 1 bar (15 lbf/in
2
).
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. Atomising air ‘B’
ON
2. Diaphragm air ‘A’
OFF
Stop spraying
3. Diaphragm air ‘A’
ON
4. Atomising air ‘B’
OFF
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.
OPERATION
INSTALLATION
see figure 2
SB-E-2 -660 – © ITW LTD 1994
5
