DeVilbiss AGN-502 User manual

SB-E-2-660 ISS.07
Operation Manual
AGN-502 Automatic gun
EN

2 © 2015 Finishing Brands UK Ltd.
EC Declaration of Conformity
We, Finishing Brands UK Limited, Ringwood Rd, Bournemouth, Dorset, BH11 9LH, UK, as
the manufacturer of the Automatic Spray gun model AGN, declare, under our sole responsibility,
that the equipment to which this document relates is in conformity with the following standards or
other normative documents:
BS EN ISO 12100: 2010, BS EN 1953:2013; and thereby conform to the protection
requirements of Council Directive 93/37/EC relating to Machinery Safety Directive.
This product also complies with the requirements of the EPA guidelines, PG6/34. Transfer
efficiency certificates are available on request.
D. Smith, General Manager
18th December 2014
Finishing Brands UK Limited reserves the right to modify equipment specification without prior notice.
AGN-502 Spray gun fitted with fan air control valve.
For ordering information see chart 1 for the selection of air cap and nozzle combinations. Add thread code for the hose
connection thread required.
Important
Read and follow all instructions and Safety Precautions before using this
equipment
Operational Description
This AGN-502 Is a lightweight diaphragm operated automatic spray gun for use with ceramic glaze,
vitreous enamels, liquid polishing compounds and similar materials. The standard gun fitted with a
rubber diaphragm is not suitable for use with solvent based coating materials; however it can be
converted for use with solvent based coating materials by fitting a PTFE protective diaphragm see
Accessories. Nozzles are available in high grade stainless steel and case hardened Nitralloy steel.
Remotely positioned valves (supplied by user) control the air supplies for atomisation and
diaphragm operation. Coating material supply is by a pressure feed system.
IMPORTANT: These guns are not designed for use with highly corrosive or highly abrasive coating
material and if used with such materials it must be expected that the need for thorough cleaning
and/or the necessity for replacement parts will be increased. If there is any doubt regarding the
suitability of a specific material, advise what material is to be used and/or submit a sample for test.

© 2015 Finishing Brands UK Ltd. 3
SAFETY WARNINGS
Fire and explosion
Solvents and coating materials can be highly flammable or combustible when sprayed.
ALWAYS refer to the coating material supplier’s instructions and COSHH sheets before
using this equipment.
Users must comply with all local and national codes of practice and insurance company
requirements governing ventilation, fire precautions, operation and house-keeping of
working areas.
This equipment, as supplied, is NOT suitable for use with Halogenated Hydrocarbons.
Static electricity can be generated by fluid and/or air passing through hoses, by the
spraying process and by cleaning non-conductive parts with cloths. To prevent ignition
sources from static discharges, earth continuity must be maintained to the spray gun
and other metallic equipment used. It is essential to use conductive air and/or fluid
hoses. Personal Protective Equipment
Toxic vapours –When sprayed, certain materials may be poisonous, create irritation or
be otherwise harmful to health. Always read all labels, safety data sheets and follow any
recommendations for the material before spraying. If in doubt, contact your material
supplier.
The use of respiratory protective equipment is recommended at all times. The type of
equipment must be compatible with the material being sprayed.
Always wear eye protection when spraying or cleaning the spray gun.
Gloves must be worn when spraying or cleaning the equipment.
Training –Personnel should be given adequate training in the safe use of spraying equipment.
Misuse
Never aim a spray gun at any part of the body.
Never exceed the maximum recommended safe working pressure for the equipment.
The fitting of non-recommended or non-original spares may create hazards.
Before cleaning or maintenance, all pressure must be isolated and relieved from the equipment.
The product should be cleaned using a gun-washing machine, and should be removed and dried
immediately after cleaning is completed. Prolonged exposure to cleaning solutions can cause
damage to the product. Noise Levels
The A-weighted sound level of spray guns may exceed 85 dB (A) depending on the set-
up being used. Details of actual noise levels are available on request. It is
recommended that ear protection is worn at all times when spraying.
Operating
Spray equipment using high pressures may be subject to recoil forces. Under certain
circumstances, such forces could result in repetitive strain injury to the operator.

4 © 2015 Finishing Brands UK Ltd.
Specifications
Hose connections
Thread code
‘B’
‘N’
Air supply Atomising:
¼" BSP
¼" NPS
Diaphragm:
6mm push-in tube connector
6mm push-in tube connector
Coating material supply:
⅜" BSP
⅜" NPS
MAXIMUM RECOMMENDED WORKING PRESSURES
Atomising air supply
P1=7 bar (100 lbf/in2)
Diaphragm air supply
P3=7 bar (100 lbf/in2)
Coating material supply
P2=6 bar (87 lbf/in2
Air consumption:
SEE CHART 1
Weight
560g

© 2015 Finishing Brands UK Ltd. 5
REF.No.
DESCRIPTION
PART NUMBER
QTY.
1
AIR CAP
SEE CHART 1
1
2
NOZZLE
SEE CHART 2
1
3
BAFFLE & SEAL
JGD-402-K
1
+4
BAFFLE SEALS
GTI-33-K5
1
5
VALVE SEAT
AGN-18
1
6
DIAPHRAGM
AGN-7
1
+7
THUMB SCREW
SSF-5711-ZN
1
+8
TUBE CONNECTOR 6mm
AGMD-126
6
9
SCREW
SSF-4272
1
CIRCLIP
SST-8434-K5
1
‘O’ RING
SSG-8069-K5
1
12
SPREADER VALVE
AGN-498
1
14
CONNECTOR ¼” NPS/BSP
H-2008
1
15
CONNECTOR 3/8” NPS/BSP
H-1580
1
Chart 1 Air cap order No (1) and nozzle (2) size (mm) combinations
NO
ORDER NO
AC
2.8
D
2.2
DE
2.0
E
1.8
EE
1.8
EX
1.8
FF
1.4
FW
1.6
FX
1.1
FZ
1.2
G
0.7
AIRFLOW
1/MIN
PRESSURE
BAR
30
AV-4239-30
275
3.4
35
AV-4239-35
144
4.1
43
AV-4239-43
396
4.1
58
AV-439-58
215
3.4
62
MB-4039-62HD
444
3.4
64
MB-4039-64HD
462
3.4
67
MB-4039-67HD
467
3.4
78
MB-4039-78
617
4.1
80
MB-4039-80
391
4.1
186
AV-4239-186
331
3.4
704
AV-4239-704
419
3.4
705
AV-4239-705
260
2.1
765
AV-4239-765
547
4.8
777
AV-4239-777
674
4.8
797
AV-4239-797
680
4.8
880
MB-4039-880
346
3.4

6 © 2015 Finishing Brands UK Ltd.
Chart 2 Nozzle Order No
NOZZLE
ORDER NO
H- HIGH GRADE STAINLESS STEEL (HARD SEAT)
AV-1915-AC
AV-645-AC
AV-1915-D
AV-645-D
AV-1915-E
AV-645-E
AV-1915-EX
AV-645-EX
AV-1915-FF
AV-645-FF
AV-1915-FW
AV-645-FW
AV-1915-FX
AV-645-FX
AV-1915-FZ
AV-645-FZ
AV-1915-G
AV-645-G
N- NITRALLOY STEEL
AV-115-AC
AV-611-AC
AV-115-D
AV-611-D
AV-115-DE
AV-611-DE
AV-115-EE
AV-611-EE
AV-115-FF
AV-611-FF
AV-115-FZ
AV-611-FZ
Installation
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 be 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 (1¼2") 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.

© 2015 Finishing Brands UK Ltd. 7
Operation
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.
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/in2).
2.3. Adjust diaphragm air supply pressure ‘A’ to 2 bar (30 lbf/in2).
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. 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.
Preventative Maintenance
Flushing the system:
1. Turn off atomising air ‘B’ and coating material ‘C’ supplies and relieve pressures.
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
Replacement of parts
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.

8 © 2015 Finishing Brands UK Ltd.
CONNECTORS (14, 15).
Remove connector (14 or 15) and clean threads in gun body. Apply a medium strength thread locking/sealing
compound to the taper thread of the new connector, screw into gun body and tighten. Recommended torque 16 Nm
(140 lbf in).
Accessories
Service kit Order KK-4998 contains parts marked with * in Parts List for figure 1.
Protective diaphragm Order AGN-8-K5. Converts gun for use with solvent based materials. Fit between the gun
body and standard rubber diaphragm.
Multipurpose spanner Order SPN-5. Contains necessary sizes for maintenance and hose connections.
Cleaning brush Order 4900-5-1-K3 for cleaning threads and recesses of gun.
Remote pressure Cup: maximum working pressure 2 bar (30 lbf/in2), capacity 2.0 litres.
Order hoses separately.
KB-522: NOT SUITABLE FOR USE WITH HYDROGENATED HYDROCARBON SOLVENTS OR WATERBOURNE
MATERIALS.
KB-522-SS: IS SUITABLE FOR USE WITH HYDROGENATED HYDROCARBON SOLVENTS OR
WATERBOURNE MATERIALS.
Pressure feed tanks: A range of sizes are available manufactured in zinc coated steel or stainless steel construction.
Please contact your local DEVILBISS Distributor for information.
Finishing Brands UK Limited,
Ringwood Road,
Bournemouth,
BH11 9LH,
UK.
Tel.No: 01202 571111
Fax No: 01202 581940
Website address: http:// www.finishingbrands.eu
Registered office:
Finishing Brands UK Limited,
400, Capability Green,
Luton,
Bedfordshire,
LU1 3AE,
UK.
Registered in England No: 07656273
Vat No: GB 113 5531 50