DÖRR EcoGun AS AUTO pro User manual

EcoGun AS AUTO pro
Automatic Air Spray Gun
MSG00005EN, V04
N36210012V
www.durr.com
Operation manual

Information about the document
This document describes the correct han-
dling of the product.
Read the document prior to every activity.
Prepare the document for the application.
Pass on the product only together with
the complete documentation.
Always follow safety instructions, han-
dling instructions and specifications of
every kind.
Illustrations can deviate from the tech-
nical construction.
Validity range of the document
This document describes the following
product:
N36210012V
EcoGun AS AUTO pro
and pro LVLP
Hotline and Contact
If you have queries or would like technical
information, please contact your dealer or
sales partner.
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TABLE OF CONTENTS
1 Product overview.......................... 4
1.1 Overview................................ 4
1.2 Short description.................... 4
2 Safety............................................. 5
2.1 Presentation of Notes............ 5
2.2 Intended Use.......................... 5
2.3 Staff qualification.................... 6
2.4 Personal protective equip-
ment....................................... 7
2.5 Residual risks......................... 7
3 Transport, scope of supply and
storage........................................... 8
3.1 Scope of delivery................... 8
3.2 Handling of
packaging material................. 8
3.3 Storage.................................. 8
4 Assembly....................................... 8
4.1 Requirements for the
Installation point..................... 8
4.2 Assembly............................... 8
4.3 Setting the spray jet............. 11
5 Commissioning........................... 11
6 Operation..................................... 13
6.1 Safety recommendations..... 13
6.2 General notes...................... 13
6.3 Rinsing................................. 14
6.3.1 Safety recommendations.. 14
6.3.2 Rinsing.............................. 14
7 Cleaning....................................... 14
7.1 Safety recommendations .... 14
7.2 Cleaning............................... 15
8 Maintenance................................ 16
8.1 Safety notes......................... 16
8.2 Maintenance schedule......... 17
8.3 Lubrication........................... 18
9 Faults........................................... 18
9.1 Safety recommendations .... 18
9.2 Defects table........................ 19
9.3 Troubleshooting................... 22
9.3.1 Replace needle and
nozzle................................ 22
9.3.2 Replace needle seal......... 23
9.3.3 Set delay time................... 24
9.3.4 Replace piston seals......... 25
10 Disassembly and Disposal........ 26
10.1 Safety recommendations... 26
10.2 Disassembly....................... 26
10.3 Disposal ............................ 27
11 Technical data............................. 27
11.1 Dimensions and weight...... 27
11.2 Connections....................... 27
11.3 Operating conditions.......... 27
11.4 Emissions........................... 27
11.5 Operating values................ 28
11.6 Type plate........................... 28
11.7 Materials used.................... 28
11.8 Operating and auxiliary
materials............................. 28
11.9 Material specification.......... 28
12 Replacement parts, tools and
accessories................................. 29
12.1 Replacement parts............. 29
12.2 Tools................................... 37
12.3 Accessories........................ 38
12.4 Order.................................. 40
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1 Product overview
1.1 Overview
Fig. 1: Product overview
1 Atomizer air control (R)
2 Horn air control (F)
3 Material flow control
4 Control air connection (C)
5 Spraying air connection (A)
6 Cap nut
7 Air cap
8 Material connection
9 Fastening bore
10 Housing
11 Leakage bore
1.2 Short description
The spray gun is intended for surface
coating. Compressed air is used to apply
material. The coating material is fed through
lines. The operation can be done with paint
circulation or tap line.
The conventional air cap (CF) is used for
decorative surfaces and an application with
more focus on the atomization.
The features of the conventional air cap (CF)
are:
Mist arm
Fine atomization
Transfer rate > 65 %
The conventional air cap (SF) is used for
decorative surfaces and an application with
more focus on the atomization.
The features of the conventional air cap (SF)
are:
Suitable for low viscosity media
Low material outflow rate
Very fine atomization
The air cap LVLP (LF) is used for applica-
tions requiring a good transfer rate and
spray pattern.
The Features of the air cap LVLP are:
Mist arm
Transfer rate > 75 %
Product overview
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You can set a spray pattern from round to
oval.
The following factors influence the spray jet
and therefore the result:
Alignment of the air cap
The alignment of the air cap determines
the alignment of the spray jet.
Atomizer air pressure
The higher the atomizer air pressure, the
higher the atomizing and the finer the
spray jet
Horn air pressure
The higher the horn air pressure, the
more oval is the spray jet.
Control air pressure
Opens the needle and controls the mate-
rial outflow.
Material pressure
The higher the material pressure, the
higher the material flow
Control air pressure is controlled externally
via valves.
The horn air pressure and spraying air pres-
sure can be adjusted on the spray gun by
means of the horn air pressure (F) and the
atomizer air control (R). The spraying air
pressure (A) is controlled externally via
valves.
You can also regulate the material flow via
the material flow control, if it is not controlled
externally. Ä 5 “Commissioning”
2 Safety
2.1 Presentation of Notes
The following notes can appear in this
instruction:
DANGER!
High risk situation that can lead to serious
injuries or death.
WARNING!
Medium risk situation that can lead to
serious injuries or death.
CAUTION!
Low risk situations that can lead to minor
injuries.
NOTICE!
Situations that can lead to material
damage.
ENVIRONMENT!
Situations that can lead to environmental
damage.
Additional information and recom-
mendations.
2.2 Intended Use
Use
The EcoGun AS AUTO pro/pro LVLP spray
gun is solely intended for automatic coating
of surfaces by one of the following operating
methods:
As independent, not hand guided device
As part of a semi- or fully automated paint
booth
As part of a paint robot
The material feed can be effected optionally
via the pressure line or under gravitation
(flow beaker).
The product is only intended for use in
industry and craftmanship.
The use is only permitted within the specified
technical data Ä 11 “Technical data”.
The spray gun is approved for use in explo-
sive areas of Ex zones 1 and 2.
Safety
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Misuse
If used incorrectly, it can cause serious inju-
ries or death.
Examples of wrong use are:
Aiming the spray gun at humans or ani-
mals.
Atomization of fluid nitrogen
Use of unapproved materials
Combination of the spray gun with com-
ponents that are not approved by Dürr
Systems for operation.
Unauthorized modifications
Use in explosive areas Ex zone 0
EX labeling
II 2G T6 X
II - Device group II: all areas except
mining
2G - Device category 2 for gas
T6 - Temperature class T6: Surface tem-
perature, max. 85°C
X - Specific conditions for safe operation
The following conditions must be observed
for safe operation:
Ground spray gun and work piece.
Only use conductive lines.
Ensure that static electricity can be dis-
charged.
2.3 Staff qualification
WARNING!
Inadequate qualification
Wrong estimation of dangers can cause
serious injury or death.
– Only sufficiently qualified persons may
execute all work.
– Some work requires additional qualifi-
cation. Additional qualifications of spe-
cialized personnel are marked with a
“+”.
This document is intended for qualified per-
sonnel in industry and craftmanship.
Operator
The operator is trained specifically for the
field of work in which he works.
Furthermore, the operator possesses the fol-
lowing knowledge:
Technical Measures for occupational
safety and health
The operator is responsible for the following
work:
Operate and monitor the system/ product.
Introduce measures in the event of faults.
Clean system/ product.
+ additional qualification explosion pro-
tection
In addition to the knowledge of the various
specialist fields, the mechanic has knowl-
edge of regulations and safety measures
when working in potentially explosive areas.
Dürr Systems offers special product training
for Ä “Hotline and Contact”.
Safety
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2.4 Personal protective equipment
Wear the required personal protective equip-
ment when working. Provide the following
personal protective equipment:
2.5 Residual risks
Explosion
Sparks, open flames and hot surfaces can
cause explosions in explosive atmospheres.
Serious injury and death could be the conse-
quence.
Before carrying out any work, make sure
that there is no explosive atmosphere.
Do not use sources of ignition and open
light.
Do not smoke.
Ground the spray gun.
Ground the work piece.
Only use conductive lines.
Flammable coating materials and their deter-
gents and cleaning agents can cause a fire
or an explosion.
Ensure that the flashpoint of the fluid is at
least 15 K above the ambient tempera-
ture.
Note explosion group of the fluid.
Follow the safety data sheet.
Ensure that forced ventilation and fire
protection equipment are in operation.
Do not use sources of ignition and open
light.
Do not smoke.
Ground the spray gun.
Danger from harmful or irritant sub-
stances
Serious injuries or death can result if you
come into contact with dangerous fluids or
steam.
Spray gun Check regularly for leakage.
Observe local regulations and mainte-
nance schedule.
Ensure that the forced ventilation is
operational.
Follow the safety data sheet.
Wear specified protective equipment.
Escaping material
Material escaping under pressure can cause
serious injuries.
Before working on the product:
Disconnect the system, in which the
product is installed, from compressed air
and material supply.
Depressurize the lines.
Secure the system against being
switched on again.
Movable components
There is a risk of death if components or
equipment in the vicinity move unexpectedly.
Switch off and lock out all system compo-
nents against being switched on again
before working on the product.
Noise
The sound pressure level during operation
may cause severe hearing damage.
Wear ear protection.
Do not spend more time then necessary
in the work area.
Hot surfaces
During normal operation the surfaces of
components can get extremely hot. Contact
with it can cause burns.
Before carrying out any work:
Check the temperature.
Do not touch hot surfaces.
Let components cool down.
Wear protective gloves.
Safety
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3 Transport, scope of supply
and storage
3.1 Scope of delivery
The scope of supply includes the following
components:
Spray gun
Tool kit Ä 12.1 “Replacement parts”
Inspect delivery on receipt for completeness
and integrity.
Report defects immediately Ä “Hotline and
Contact”.
3.2 Handling of packaging material
ENVIRONMENT!
Incorrect disposal
Incorrectly disposed packaging material
can damage environment.
– Dispose of material no longer required
in an environment-friendly manner.
– Observe local disposal specifications.
3.3 Storage
Storage provisions:
Do not store outdoors.
Store Spray gun only when dry.
Store in a dust-free place.
Do not expose to aggressive media.
Protect from solar radiation.
Avoid mechanical vibrations.
Temperature: 10°C to 40°C
Relative humidity: 35% to 90%
4 Assembly
4.1 Requirements for the
Installation point.
The control air supply and the material
feed to the spray gun must be interrupted
and secured against reconnection.
Lines, seals and screw connections must
be designed to conform to the require-
ments of the spray gun Ä 11.5 “Operating
values”.
A support bracket capable of securing the
spray gun is required.
The control air supply must be adjustable.
The control air supply must have venting.
4.2 Assembly
Stationary assembly
Personnel:
Operator
+ additional qualification explosion pro-
tection
Protective equipment:
Protective workwear
Protective gloves
Observe the following at assembly:
Diameter of the fastening bore: 10mm
Nominal diameters: Ä 11.2 “Connections”
1. WARNING!
Sources of ignition may cause explo-
sions!
Ensure a non-explosive atmosphere.
Transport, scope of supply and storage
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Fig. 2: Assembly
2. Push spray gun with the fastening bore
(1) on the support bracket.
Alignment is arbitrary. The dis-
tance to the work piece must be
15 to 25cm.
3. WARNING!
Statically charges components may
cause explosions during operation!
Ground the spray gun through the fas-
tening bore or material connection lines, if
the support bracket itself is non-conduc-
tive or is not grounded. Ensure housing
contact.
Resistance between housing and
grounding terminal ≤ 1MΩ.
Fig. 3: Connect
4. The spray gun does not work
when the lines are not connected
correctly.
Connect lines. Ensure correct assign-
ment.
1 - Material (M)
2 - Spraying air (A)
3 - Control air (C)
Connect lines to both material con-
nections for paint circulation mode.
For tap line mode, connect line to a
material connection. Close the other
material connection with the locking
screw ( Ä 12.3 “Accessories”) sup-
plied as accessory.
Assembly
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Robot assembly
Personnel:
Operator
+ additional qualification explosion pro-
tection
Protective equipment:
Protective workwear
Protective gloves
For a robot assembly, the corresponding
robot version of the spray gun must be used
or the spray gun must be reconstructed with
the components of the optional robot kit
Ä 12.3 “Accessories” for robot version. The
regular inserts are exchanged here against
connecting pieces.
The reconstruction and the connection of the
robot version of the spray gun are described
below.
1. WARNING!
Sources of ignition may cause explo-
sions!
WARNING!
Statically charges components may
cause explosions during operation!
Attach spray gun on the support bracket
as for the stationary assembly and
ground it properly Ä “Stationary
assembly”.
Fig. 4: Assembling robot accessories
2. Lock spraying air connection (A) with the
blind plugs of the robot kits (4).
3. Replace regulating inserts of the atomizer
air control (R) and the horn air control (F)
by the regulating inserts and the screw-in
plug connections of the robot kits (1 and
2).
4. The spray gun does not work
when the lines are not connected
correctly.
Connect lines. Ensure correct assign-
ment.
1- Atomizer air (R)
2 - Horn air (F)
3 - Material (M)
4 - Unused
5 - Control air (C)
Connect lines to both material con-
nections for paint circulation mode.
For tap line mode, connect line to a
material connection. Close the other
material connection with the locking
screw ( Ä 12.3 “Accessories”) sup-
plied as accessory.
Assembly
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4.3 Setting the spray jet
Personnel:
Operator
+ additional qualification explosion pro-
tection
Protective equipment:
Protective workwear
Protective gloves
Fig. 5: Adjust spray jet
The orientation of the spray jet can be
changed to any direction by rotating he air
cap (2).
1. Lightly loosen the cap nut (1).
Fig. 6: Align air cap
2. Rotate air cap (2) into the required posi-
tion.
3. Hand-tighten cap nut (1).
5 Commissioning
Personnel:
Operator
+ additional qualification explosion pro-
tection
Protective equipment:
Use ear protection
Eye protection
Respiratory protection device
Protective workwear
Protective gloves
Depending on the design of the application
system, two technicians must be present to
execute the commissioning:
Technician 1: Operates the controls.
Technician 2: Check on the spray gun.
1. Actuate the spray gun without material
via the control unit or the visualizer.
2. Check the switching behavior.
Does the needle open and close as
required?
Are all types of air supply connected?
3. Purge spray gun Ä 6.3 “Rinsing”.
4. Connect material.
5. Create a trial spray pattern on a test work
piece.
Commissioning
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Setting the spray pattern
NOTICE!
Wrong handling of the material flow
control
If the material quantity is set using the
material flow control, it must not be used
for closing the material nozzle. Otherwise,
cracks and fractures can occur on the
material nozzle, ultimately leading to the
failure of the spray gun.
– Do not use the material flow control for
closing the nozzle.
– Close the material flow control by
turning it only with slight force (two fin-
gers). Do not continue turning it if
resistance is increasing.
Personnel:
Operator
+ additional qualification explosion pro-
tection
Protective equipment:
Use ear protection
Eye protection
Respiratory protection device
Protective workwear
Protective gloves
You can adjust the spray pattern continu-
ously between round and flat, by using horn
air.
You can vary the size of the spray
pattern by adjusting the distance
between the spray gun and the work
piece.
Fig. 7: Setting the spray pattern
1. Set material quantity via valves in control
cabinet or at material flow control (3).
Open the material flow control on
the spray gun when controlling
via the regulation cabinet.
2. Set atomizer air using valves in the con-
trol cabinet or on the atomizer air control
(R) (1).
Observe the following character-
istic curve.
3. Set horn air using the horn air control (F)
(2) or, in the case of robot assembly,
using valves in the control cabinet.
ðWhen the horn air is blocked, the
spray pattern is round.
Commissioning
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Characteristic curve
Fig. 8: Characteristic curve
1 Conventional air cap
2 Air cap LVLP
A 0.5 to 0.8mm (CF)/0.5 to 1.2mm
(LF)
B 1.4 to 1.6mm (CF)/1.3 to 1.6mm
(LF)
C 1.8 to 2.5mm (CF and LF)
D 3.0mm (CF and LF)
X-Achse Spraying air pressure [bar (psi)]
Y-Achse Flow rate [Nl/min (CFM)]
The characteristic curves shows the relation
between spraying air pressure and air con-
sumption for four conventional air caps (CF)
(1) and four air caps LVLP (LF)(2) with dif-
ferent diameters.
6 Operation
6.1 Safety recommendations
WARNING!
Danger of explosion due to chemical
reactions
Material, halogenated hydrocarbon-based
rinsing agent or cleaning agent can chemi-
cally react with aluminum components of
the product. Chemical reactions can cause
explosions. Serious injury and death could
be the consequence.
– Only use purging agents and cleaning
agents that do not contain any halo-
genated hydrocarbons.
NOTICE!
Material damage due to dried material
residues
If material residues dry in the product, that
can harm components.
– Rinse product immediately after each
use.
6.2 General notes
1. Perform the following checks during oper-
ation:
Check O-rings for correct seating and
tightness.
Check air car for cleanliness.
Check nozzle for cleanliness.
Operation
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6.3 Rinsing
6.3.1 Safety recommendations
NOTICE!
Material damage due to unsuitable
rinsing agent
If the rinsing agent reacts chemically with
the components or the material, compo-
nents get damaged.
– Use only the rinsing agents that are
compatible with the components and
the material.
– Refer to safety data sheet of material
manufacturer.
6.3.2 Rinsing
Personnel:
Operator
+ additional qualification explosion pro-
tection
Protective equipment:
Use ear protection
Eye protection
Respiratory protection device
Protective workwear
Protective gloves
The spray gun must be rinsed:
After end of work
Before every change of material
Prior to cleaning
Prior to dismantling
Before a long time of non-use
Before placing in storage
Additional rinsing intervals depend
on the material used.
1. Rinse the spray gun with an appropriate
rinsing agent until the rinsing agent runs
clean without any material residue.
7 Cleaning
7.1 Safety recommendations
WARNING!
Danger of fire and explosion
Flammable coating materials and their
detergents and cleaning agents can cause
a fire or an explosion.
– Ensure that the flashpoint of the fluid is
at least 15 K above the ambient tem-
perature.
– Note explosion group of the fluid.
–Follow the safety data sheet.
–Ensure that forced ventilation and fire
protection equipment are in operation.
– Do not use sources of ignition and
open light.
– Do not smoke.
– Check grounding.
WARNING!
Danger from harmful or irritant sub-
stances
Serious injuries or death can result if you
come into contact with dangerous fluids or
steam.
– Spray gun Check regularly for leakage.
Observe local regulations and mainte-
nance schedule.
– Ensure that the forced ventilation is
operational.
– Follow the safety data sheet.
– Wear specified protective clothing.
– Avoid contact (e.g. with eyes, skin).
Cleaning
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WARNING!
Risk of injury due to escaping material
and compressed air
Escaping compressed material can cause
serious injury.
Before carrying out any work:
– Disconnect the system, in which the
spray gun is installed, from com-
pressed air and material supply.
– Secure the system against being
switched on again.
–Depressurize the lines.
WARNING!
Danger of explosion due to chemical
reactions
Material, halogenated hydrocarbon-based
rinsing agent or cleaning agent can chemi-
cally react with aluminum components of
the product. Chemical reactions can cause
explosions. Serious injury and death could
be the consequence.
– Only use purging agents and cleaning
agents that do not contain any halo-
genated hydrocarbons.
NOTICE!
Unsuitable cleaning agents
Unsuitable cleaning agents can damage
the product.
– Only use cleaning agents approved by
the material manufacturer.
– Follow safety data sheets.
– Place heavily soiled components in a
cleaning bath.
–Only place those parts in the
cleaning bath, which are suitable for
the cleaning bath.
– Use only electrically conductive
containers.
– Ground the container.
– Do not use ultrasound baths.
Use alcohols (isopropanol, butanol) for
non-flammable coating materials.
Remove dried non-flammable coating
materials using a material manufacturer-
approved organic thinner.
NOTICE!
Damage due to unsuitable cleaning
tools
Unsuitable cleaning tools can damage the
product.
– Only use cloths, soft brushes and
paintbrushes.
– Do not use abrasive cleaning tools.
– Do not poke blocked nozzles with met-
allic objects.
– Do not use compressed air for
cleaning.
– Do not use any thinner spray guns.
– Do not use high pressure for cleaning
agents.
7.2 Cleaning
Clean spray gun
Personnel:
Operator
+ additional qualification explosion pro-
tection
Protective equipment:
Use ear protection
Eye protection
Respiratory protection device
Protective workwear
Protective gloves
1. Purge spray gun Ä 6.3 “Rinsing”.
2. Use a cleaning agent to carefully clean
the spray gun. Dry with a soft cloth.
Cleaning
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Cleaning the air cap und nozzle
For a thorough cleaning you can remove the
air cap and the nozzle.
Disassembly
Fig. 9: Disassemble needle
1. Thread off and remove nozzle (4) with
end cap.
2. Remove needle spring (2) and plunger
spring (3).
3. Pull back complete needle (1) out of the
housing.
Fig. 10: Disassemble nozzle
4. Loosen the cap nut (6).
5. Remove cap nut (6) and air cap (7).
6. Remove the nozzle (5) with an open-end
wrench (SW13).
7. Clean air cap using cleaning agent and
cleaning brush Ä 12.2 “Tools”.
8. Wipe the cleaned air cap dry with a cloth.
9. Clean the nozzle in the cleaning bath.
Assembly
10. Insert and tighten nozzle (5).
Tightening torque: 18 to 20Nm
11. Fit the cap nut (6) and air cap (7).
12. Align air cap (7).
13. Hand-tighten cap nut (6).
14. Lubricate needle shank lightly with sili-
cone-free oil. Push in needle (1) care-
fully into the housing from the back.
15. Insert needle spring (2) and plunger
spring (3).
16. Hand-tighten end cap (4).
8 Maintenance
8.1 Safety notes
WARNING!
Unsuitable replacement parts in explo-
sive areas
Replacement parts not compliant with the
specifications of the ATEX guidelines can
cause explosions in an explosive atmos-
phere. Serious injury and death could be
the consequence.
– Use exclusively original replacement
parts.
Maintenance
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WARNING!
Danger from harmful or irritant sub-
stances
Serious injuries or death can result if you
come into contact with dangerous fluids or
steam.
– Spray gun Check regularly for leakage.
Observe local regulations and mainte-
nance schedule.
– Ensure that the forced ventilation is
operational.
– Follow the safety data sheet.
– Wear specified protective clothing.
– Avoid contact (e.g. with eyes, skin).
WARNING!
Risk of injury due to escaping material
and compressed air
Escaping compressed material can cause
serious injury.
Before carrying out any work:
– Disconnect the system, in which the
spray gun is installed, from com-
pressed air and material supply.
– Secure the system against being
switched on again.
–Depressurize the lines.
CAUTION!
Risk of injury due to spring tension
The end cap of the spray gun is under
spring tension. If you remove the end cap,
the spring tension could cause the end
cap to jump out unexpectedly and cause
light injuries.
– Removing and installing end cap
8.2 Maintenance schedule
The maintenance intervals given below are based on experiential values. Maintenance intervals,
adjust individually if necessary.
Interval Maintenance work
Daily Check condition and tightness (also of the connections
and lines).
Check fastening.
Before every change of material Clean Ä 7.2 “Cleaning”.
Monthly Lubricate internal components Ä 8.3 “Lubrication”.
After each alteration Check grounding Ä 4.2 “Assembly”.
Maintenance
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8.3 Lubrication
Personnel:
Operator
+ additional qualification explosion pro-
tection
Protective equipment:
Protective workwear
Protective gloves
Piston axis, needle shank, piston sleeve and
piston glide surface in the gun housing must
be lubricated every month so that there will
not be any leakages.
Fig. 11: Lubricate piston components
1. Feed lubricant (silicone-free oil) at the
control air connection (C) (1) using con-
trol air.
9 Faults
9.1 Safety recommendations
CAUTION!
Risk of injury due to spring tension
The end cap of the spray gun is under
spring tension. If you remove the end cap,
the spring tension could cause the end
cap to jump out unexpectedly and cause
light injuries.
– Removing and installing end cap
NOTICE!
Property damage due to improper
replacement of needle and nozzle
Replacing only the needle or only the
nozzle could damage spray gun compo-
nents. This can compromise the tightness
of the spray gun. The spray pattern deteri-
orates.
– Observe order of replacement steps
(needle – nozzle).
– Observe order of assembly steps
(nozzle – needle).
– Always replace nozzle and needle at
the same time.
NOTICE!
Property damage due to improper han-
dling
Mechanical load can damage needle and
nozzle.
– Handle with care during installation
and dismantling.
– Do not subject the needle to any
mechanical pressure.
– Avoid collisions of components to be
assembled and disassembled with the
needle.
– Do not excessively tighten compo-
nents.
Faults
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NOTICE!
Improper setting causes damage
The delay time is factory-set. Setting a
wrong delay time can damage the nozzle
and the needle.
– You should only change the delay time
upon inserting a new needle or in case
there are problems with the spray pat-
tern.
– If in doubt, contact Dürr Systems
Ä “Hotline and Contact”.
9.2 Defects table
Visualizer of typical spray pattern problems
Spray pattern Fault identification
Spray jet is distorted.
Spray jet is bent or tapered.
Spray jet is too thick in the middle.
Spray jet is split.
Faults
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Spray pattern Fault identification
Spray jet is uneven.
Spray jet is sickle-shaped.
Fault description Cause Remedy
No material Line pinched or broken Check the line.
Needle does not open. Check Control air.
Material leaking when
needle is closed.
Needle does not close
correctly.
Check control air venting.
Check operation of needle. Replace
needle, if defective, together with the
nozzle Ä 9.3.1 “Replace needle and
nozzle.”.
Nozzle soiled or defec-
tive
Clean and check the nozzle. If nozzle is
defective, replace it along with the needle
Ä 9.3.1 “Replace needle and nozzle.”.
Air leaks from the
material flow control
Piston sleeve worn out Replace piston sleeve Ä 9.3.4 “Replace
piston seals.”.
Air leak from the
leakage bore
O-rings of the piston
worn out
Replace O-rings Ä 9.3.4 “Replace piston
seals.”.
Sealing rings worn out Have the sealing rings replaced by Dürr
Systems.
Air leak between
piston axis and
housing
Lip seal worn out Have the lip seal replaced by Dürr Sys-
tems.
Or replace lip seal with assembly / disas-
sembly tool for lip seal ( Ä 12.2 “Tools”).
Spray jet misaligned Air cap is misaligned Rotate air cap into the required position
Ä 4.3 “Setting the spray jet”.
Spray jet too strong in
center
Too much material Reduce material feed.
Increase spraying air pressure (A).
Material too viscous Change material consistency.
Faults
02/2020EcoGun AS AUTO pro - MSG00005EN20/44