DeVilbiss AGN-502 User manual

SB-E-2-660 ISS.07

Operation Manual

AGN-502 Automatic gun

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.

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.

Specifications

Hose connections

Thread code

‘B’

‘N’

Air supply Atomising:

¼" BSP

¼" NPS

Diaphragm:

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

REF.No.

DESCRIPTION

PART NUMBER

QTY.

AIR CAP

SEE CHART 1

NOZZLE

SEE CHART 2

BAFFLE & SEAL

JGD-402-K

BAFFLE SEALS

GTI-33-K5

VALVE SEAT

AGN-18

DIAPHRAGM

AGN-7

THUMB SCREW

SSF-5711-ZN

TUBE CONNECTOR 6mm

AGMD-126

SCREW

SSF-4272

CIRCLIP

SST-8434-K5

‘O’ RING

SSG-8069-K5

SPREADER VALVE

AGN-498

CONNECTOR ¼” NPS/BSP

H-2008

CONNECTOR 3/8” NPS/BSP

H-1580

Chart 1 Air cap order No (1) and nozzle (2) size (mm) combinations

ORDER NO

2.8

2.2

2.0

1.8

1.4

1.6

1.1

1.2

0.7

AIRFLOW

1/MIN

PRESSURE

BAR

AV-4239-30

275

3.4

AV-4239-35

144

4.1

AV-4239-43

396

4.1

AV-439-58

215

3.4

MB-4039-62HD

444

3.4

MB-4039-64HD

462

3.4

MB-4039-67HD

467

3.4

MB-4039-78

617

4.1

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

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.

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.

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

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