Walther SMS-02 User manual

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 1 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
Telefon: [phone] Telefax: [phone]
http://www.walther-2000.de –[e-mail]
Assembly Instructions
Spray Valve SMS-02
Article Number: S02-….
Picture: Spray Valve SMS-02 with flat air cap and raster-needle lock
NOTE
Please read the Assembly Instructions carefully before first using the incomplete device and
strictly adhere to the instructions!
The incomplete device may only be worked with and worked on by persons who are familiar
with the assembly instructions and the current regulations for industrial safety and accident
prevention.
Always keep this translated version of the “Original Assembly Instructions“at the incomplete
device! The instructions have to be available anytime!

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 2 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
Telefon: [phone] Telefax: [phone]
http://www.walther-2000.de –[e-mail]
Table of Contents
Page
EC DECLARATION OF INCORPORATION ....................................................................................................................... 4
1INTRODUCTION ................................................................................................................................................. 5
1.1 TARGET GROUP OF THE ASSEMBLY INSTRUCTIONS ............................................................................................................ 5
1.2 LIST OF SIGNS AND SYMBOLS ....................................................................................................................................... 5
2SAFETY............................................................................................................................................................... 5
2.1 GENERAL INFORMATION ............................................................................................................................................. 5
2.2 DANGERS FROM RESIDUAL ENERGY............................................................................................................................... 5
2.3 WARRANTY AND LIABILITY........................................................................................................................................... 5
2.4 CORRECT USE ........................................................................................................................................................... 6
2.5 INCORRECT USE ........................................................................................................................................................ 6
2.6 QUALIFICATION OF PERSONNEL .................................................................................................................................... 6
3TRANSPORT....................................................................................................................................................... 7
3.1 PACKAGING .............................................................................................................................................................. 7
3.2 TASKS BEFORE TRANSPORT .......................................................................................................................................... 7
4DESCRIPTION OF FUNCTION .............................................................................................................................. 7
4.1 PURPOSE OF THE DEVICE............................................................................................................................................. 7
4.2 TECHNICAL DATA ....................................................................................................................................................... 8
4.3 TYPE LABEL .............................................................................................................................................................. 8
5INSTALLATION AND START-UP............................................................................................................................ 8
5.1 HOSE MOUNTING...................................................................................................................................................... 8
5.2 TOTAL VIEW /DESCRIPTION......................................................................................................................................... 9
5.3 ADJUSTING THE DEVICE .............................................................................................................................................. 9
5.4 SMS-02 WITH RASTER-NEEDLE DETECTION ................................................................................................................. 10
5.4.1 Terminal Assignment for Needle Query..................................................................................................... 10
5.4.2 Terminal Assignment for Magnetic Valve.................................................................................................. 10
5.5 INSTALLATION DIAGRAM FOR COLOR-MARKING SYSTEMS................................................................................................ 11
6OPERATION ..................................................................................................................................................... 11
6.1 GENERAL INFORMATION ........................................................................................................................................... 11
6.2 OPERATION INFORMATION /OPERATING CONDITIONS .................................................................................................... 11
6.3 OPERATING ELEMENTS ............................................................................................................................................. 12
7MAINTENANCE AND REPAIR ............................................................................................................................ 13
7.1 GENERAL INFORMATION ........................................................................................................................................... 13
7.2 CLEANING .............................................................................................................................................................. 13
7.3 EXCHANGING THE AIR VALVE (11.0.0) ........................................................................................................................ 13
7.4 EXCHANGING THE RETURN CHECK VALVE,COMPLETE (10.0.0)......................................................................................... 13
7.5 REPLACING THE NEEDLE (7.0.0) AND THE NOZZLE (2.1.0).............................................................................................. 13
7.6 EXCHANGING THE SEALING BUSH (6.0.0) .................................................................................................................... 14
7.7 INSERTING GASKETS AND O-RINGS: ............................................................................................................................ 14
7.8 MAINTENANCE FOR OPERATION IN COLOR-MARKING SYSTEMS (NORMAL OPERATION) ........................................................ 14
7.9 SPARE PARTS .......................................................................................................................................................... 15
7.10 CUSTOMER SERVICE /SUPPORT............................................................................................................................. 15
8TROUBLESHOOTING ........................................................................................................................................ 16
8.1 GENERAL INFORMATION ........................................................................................................................................... 16
8.2 FAILURES: .............................................................................................................................................................. 16
8.3 SPRAY IMAGE/TYPE OF DEFECT .................................................................................................................................. 17
9TAKING OUT OF SERVICE ................................................................................................................................. 18
9.1 SHORT INTERRUPTION .............................................................................................................................................. 18
9.2 LONG-TERM INTERRUPTION....................................................................................................................................... 18

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 3 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
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9.3 FINAL SHUTDOWN OF DEVICE .................................................................................................................................... 18
10 APPENDIX........................................................................................................................................................ 19
10.1 DIMENSIONED DRAWING (FLAT JET)....................................................................................................................... 19
10.2 DIMENSIONED DRAWING (ROUND JET)................................................................................................................... 19
10.3 SPARE PARTS DRAWING SMS-02 (STANDARD)......................................................................................................... 20
10.3.1 Spare Part List for SMS-02 (Standard) .................................................................................................. 21
10.4 SPARE PART DRAWINGS SMS-02 (RASTER-NEEDLE DETECTION) ................................................................................. 22
10.4.1 Spare Part List for SMS-02 (Raster-Needle Detection).......................................................................... 23
10.5 ARTICLE NUMBERS FOR AIR CAPS .......................................................................................................................... 24
10.6 ARTICLE NUMBERS FOR NOZZLES ........................................................................................................................... 25
10.7 ARTICLE NUMBERS FOR NOZZLE NEEDLES................................................................................................................ 27
10.8 ARTICLE NUMBERS FOR VALVES ............................................................................................................................. 28
10.9 ARTICLE NUMBERS FOR THREADED JOINTS............................................................................................................... 28
10.10 ARTICLE NUMBERS FOR OTHER PARTS..................................................................................................................... 29
10.11 WEAR-AND-TEAR PARTS ...................................................................................................................................... 30
10.12 ACCESSORIES ..................................................................................................................................................... 31
10.13 DESCRIPTION PNEUMATIC NEEDLE-STROKE ADJUSTMENT 97800037 .......................................................................... 33

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 4 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
Telefon: [phone] Telefax: [phone]
http://www.walther-2000.de –[e-mail]
EC Declaration of Incorporation
in accordance with EU Machinery Directive 2006/42/EU, dated 17 May 2006, Appendix II B
We herewith confirm that the below mentioned incomplete device meets the basic requirements for safety
and health as stated in EU Machinery Directive 2006/42/EU for its design and construction as well as for the
configuration released by us on the market. This machine component will not be operated before it has been
determined that the incomplete system where the machine component will be installed also meets the
requirements of the Directive (2006/42/EG).
Manufacturer Walther Systemtechnik GmbH
Hockenheimer Straße 3
D- 76726 Germersheim
Description Spray Valve SMS-02, Article-No. S02-…
We also declare the conformity with other, product-relevant directives/guidelines:
Mach. Direct. 2006/42/EU App. I, Clause: 1.1.2, 1.1.3, 1.1.5, 1.1.6, 1.3.2, 1.3.3,
1.3.4, 1.5.1, 1.5.8, 1.5.9
EMC- Directive 2014/30/EU, dated 26. February 2014
Applied harmonized standards, in particular:
DIN EN ISO 12100 Safety of Machinery –General Design Principles –
Risk Assessment and Risk Reduction (ISO
12100:2010)
In addition, we also confirm that the special documentation according to Appendix VII Part B has
been prepared.
The manufacturer, respectively his authorized representative obligates himself to submit this documentation
to the market surveillance authorities, if requested.
This EC Declaration of Incorporation becomes invalid if the incomplete device will be altered or changed
without consent of Walther Systemtechnik GmbH.
Authorized representative for Technical Documentation:
Stefan Hirl, Hockenheimer Straße 3, D- 76726 Germersheim
Germersheim, 04 April 2017
(Place, Date) (Stefan Hirl, Management)

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 5 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
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1 Introduction
1.1 Target Group of the Assembly Instructions
Operating Personnel
Maintenance Personnel
1.2 List of Signs and Symbols
The assembly instructions warn users of operations which may put their health at risk.
The warnings are indicated by combinations of text and symbols as follows:
DANGER
Describes a potentially dangerous situation.
Death, grievous bodily harm or severe material damage WILL occur if the respective
measures of precaution have not been taken
WARNING
Describes a potentially dangerous situation.
Death, grievous bodily harm or severe material damage MAY occur if the respective measures
of precaution have not been taken.
CAUTION
Describes a potentially dangerous situation.
Slight injuries CAN occur if the respective measures of precaution have not been taken. This
signal word is also used to describe possible property damages.
IMPORTANT
Indicates tips for usage and other particularly useful information.
No dangerous situation.
2 Safety
2.1 General Information
The construction of this device is according to the latest technology and is absolutely reliable. The individual
components as well as the complete device are continuously checked by our quality management.
2.2 Dangers from Residual Energy
Please instruct the operating personnel on the respective measures to be taken against the occurrence of
mechanical, hydraulic, pneumatic and electric / electronic residual energies.
2.3 Warranty and Liability
According to the conditions laid down by the German Engineering Association (VDMA), Walther Sys-
temtechnik GmbH has a guarantee of 12 months under normal European operating conditions on its own
parts (spare parts are excluded); or according to the conditions of the manufacturer.
This guarantee can only be granted by Walther Systemtechnik GmbH, if:
the user has thorough knowledge of the content of the assembly instructions;
the user follows the instructions and notes contained in the assembly instructions;
the user does not rebuild or make changes on parts of the device without prior consent of WST Sys-
temtechnik GmbH.

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 6 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
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2.4 Correct Use
This device is a needle valve and will be used for processing materials which can be sprayed in continuous
or intermitting operation. Under no circumstances shall aggressive media such as acids, alkaline solutions,
detergents, chemicals or others be sprayed. If you are not sure, please contact the manufacturer if a certain
spray medium is suitable for this device.
2.5 Incorrect Use
Operating the incomplete device with insufficient knowledge about the operation, maintenance and care
of the device.
Making changes, extensions or alterations on the incomplete device that may hamper its safety without
the prior consent of Walther Systemtechnik GmbH.
Operating the incomplete device with defective safety installations or not properly attached or malfunc-
tioning safety devices.
Using unsuitable materials.
Handling the incomplete device while energized.
2.6 Qualification of Personnel
Only trained and instructed personnel may conduct work on the equipment.
The responsibilities of the personnel for assembly work, operation, repair work or maintenance work must be
clearly assigned to individuals!
Persons in training may work with the equipment only under supervision of an experienced person.
Personnel
Task
Instructed
Personnel
Personnel with Technical
Qualification
Specialist
Supervisor
Packaging, Transport
X
-
-
-
Commissioning
X
X
-
Operation
X
-
Troubleshooting, general
X
X
-
Troubleshooting
mechanical
-
X
-
-
Troubleshooting electrical
-
-
X
-
Setting up
-
X
-
-
Maintenance
-
X
-
-
Repair
-
X
X
-
Taking out of service,
Storage
-
X
X
-

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 7 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
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3 Transport
3.1 Packaging
The type of packaging depends on the individual mode of shipping. If not separately contracted, the
packaging is in accordance with the rules and regulations of Walther Systemtechnik GmbH. This rule is in
accordance with the Federal Association for Packaging HPE.
3.2 Tasks before Transport
The following has to be done before transport:
Disconnect all power lines.
The actual transport of the incomplete device and its individual parts requires special care in order to prevent
damages from external forceful impact or careless on- and off-loading. Depending on the mode of
transportation, suitable transport and load securing has to be selected. The incomplete device will be aligned
and leveled by appropriate fastening elements.
4 Description of Function
The spray valves of SMS-02 series are suitable for the application of liquid up to viscous media, such as
grease, oil, separating agents, colors or glues. One of the major characteristics of SMS-02 series is the
integrated spray air valve with which you can adjust the post-spray duration for cleaning the nozzles.
Depending on the individual air cap, a round or flat jet is produced. And depending on the viscosity of the
applicable medium, the application image can be adjusted individually via the nozzle size or the atomized air
pressure or also the material pressure. Three different hoses are supplying atomized air, control air and
medium.
4.1 Purpose of the Device
CAUTION
The use of other media can cause functional failures, damages or even the destruction of the
device.
Spray valve SMS-02 is a pneumatically controlled application device for processing sprayable materials,
such as glues, grease, colors etc. The control air lines were kept short due to a directly flanged 5/2-way
magnetic valve (17.0.0) and they produce fast and very precise open/close movements of the needle (7.0.0).
The working piston is firmly connected to the needle (7.0.0) and receives air pressure from the 5/2-way
magnetic valve for the larger piston surface. This results in the opening movement of the needle. As soon as
the air pressure on the larger surface of the working piston is turned off, the control air on the smaller surface
of the working piston will initiate the closing movement.
During the operation, the closing spring (9.6.3) is disabled. This happens through the control air which is
permanently pending on the smaller working surface and which also simultaneously compresses the closing
spring (9.6.3) above the closing piston (9.8.3). Thereby the closing spring cannot hamper the fast switching
times of the needle. The closing spring will only be operational in case of failure or turn-off of the compressed
air supply. This will guarantee that no sprayable medium will be released during a defect in the air supply.
The device uses pre-supply/after-supply air (Setting-up of System, see also 6.3) for cleaning the nozzle
(2.1.0).
The device is used for spraying applications. The material pressure has to correspond with the desired spray
image and also with the atomizing air pressure. Spraying can be intermitting as well as continuous. The
control air pulses will be transferred via the 5/2-way magnetic valve (17.0.0) to the working piston.
Depending on the individual case of operation, it is important to adapt the control air pressure to the
switching frequency. For 5 intermissions already, this pressure has to be set to 5 bar.

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 8 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
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4.2 Technical Data
General Data
Size with flat-jet air cap [mm]
130 x 80 x 22
Size with round-jet air cap [mm]
127 x 80 x 22
Weight [g]
ca. 525
Air consumption [l/min]
ca. 150 (at 3 bar; nozzle-1.0 mm and flat-jet)
Switching time [ms]
ca. 100 (for color marking systems ca. 200)
Energy Supply
Control air pressure [bar]
4.5-6
Atomizer air pressure [bar]
0.5 –5 (at least 0.5 bar lower than control pressure)
Material pressure [bar]
max. 35
Voltage [VDC]
24
Power consumption [W]
1,8
4.3 Type Label
The type label was etched into the casing. The serial number is
hammered into this label.
5 Installation and Start-up
The valves can be installed in any position. The distance to the application area depends on the desired
application width. An intermitting operation of the device will cause natural oscillations; therefore a solid
installation is most important. Try to avoid excessive natural oscillations (transmission from device to valve).
5.1 Hose Mounting
There are three functional hoses which will be con-
nected as follows:
1 Material to G 1/8-connection (matching screw
connections can be ordered as accessories!)
2 Control air SL to screw connection for 6mm-
hose (21.0.0)
3 Atomizer air ZL to screw connection for 6mm-
hose (21.1.0)
1
3
2

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 9 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
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5.2 Total View / Description
1
Basic casing
2
Nozzle with air cap and retainer ring
3
Raster needle lock
4
5/2-way magnetic valve
5
Material connection
6
Connection for atomizer air
7
Connection for control air
8
2x Fastening thread M5
5.3 Adjusting the Device
The stroke adjustment of the needle (Pos. 7.0) will be used for setting the material quantity. A left turn of the
raster-needle locking screw will increase the material quantity. A finely ascending precision thread results in
a needle stroke which changes 0.5mm with one turn of the raster head.
IMPORTANT
The maximum turn of the raster-needle locking screw anti-clockwise should not exceed the
noticeable raster steps. This will already exceed the maximum needle stroke adjustment.
If you continue turning, the raster-needle locking screw will be dislocated!
IMPORTANT
Nozzle and nozzle needle can be damaged by wrong treatment. Only reduce the material flow
with emerging material (right turn of adjusting screw). Do not turn adjusting screw further to
the right after closing of the nozzle!
NOTE
The duration of the after-supply air will be individually set from the outside at the spray valve.
The adjusting screw (10.4.0) is flush-mounted at the side and will be turned (in spray direction:
to the right) with a screwdriver in order to adjust the duration of the after-supply air as follows.
right turn = longer after-supply air duration
left turn = shorter after-supply air duration
Basic setting = screw flush-mounted with basic body; then one turn to the
right
3
8
6
7
4
2
5
1

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 10 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
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5.4 SMS-02 with Raster-Needle Detection
Optionally, you can use a raster-needle lock with a pre-installed, inductive proximity switch. It will release a
signal when the needle piston with the needle is open. This will help you in digitally monitoring the status
„nozzle open“.
5.4.1 Terminal Assignment for Needle Query
5.4.2 Terminal Assignment for Magnetic Valve
+
-
Standard plug 24V valve (left [+] and right [-])
Raster-Needle Detection

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 11 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
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5.5 Installation Diagram for Color-Marking Systems
6 Operation
6.1 General Information
This device may only be operated if the safety-related equipment is permanently effective and not suspend-
ed during operation or altered in its intended effectiveness.
6.2 Operation Information / Operating Conditions
CAUTION
Never point the jet at people. The wearing of eye protection is strongly recommended. The
spraying process can create noise depending on the air and fluid pressures used. Ear pro-
tection should be worn, if required.
WARNING
Danger caused by flammable, harmful fluid. Always follow the safety instructions on the con-
tainer or the safety data sheet for the fluid.
Spray valves of the SMS-02 series generally operates with a control pressure of 5 - 6 bar. The atomizer
pressure has to be lower than the material pressure in order to avoid a repulse of the material. Atomized air
pressure and material pressure should be closely correlated.
IMPORTANT
Accident prevention directions will be strictly followed when applying high material
pressures. Please strictly follow the following instructions when planning and constructing
application systems!
Each spraying valve must be equipped with its own pressure regulator for atomizing air.
In case several spraying valves are supplied by one and the same material pressure tank, these
valves must not spray simultaneously.
The supply route for the material between material pressure tank and spraying valve must not exceed
2 m.
Connection ZL
Connection SL
ca. 5-6 bar
Raster-needle lock for
spray medium adjustment
Connection M
max. 35 bar

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 12 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
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If the pause time is a multiple of the spray time, the valve must be sprayed free in a separate location
or the spray valve should be operated several times to optimize the application.
After standstills of 15 min. and more, the valve must be sprayed free by pressing the switch 3 to 5
times.
The application can be controlled as intermitting or continuous. Depending on the individual use, the control
pressure has to be adjusted to the set switching frequency on the one hand and to the higher or lower
material pressures on the other. Under appropriate operating conditions (material pressure, control pressure,
needle stroke, and short supply lines) a total of 50 strokes per second can be reached.
IMPORTANT
A device-specific set-up is required for an optimum adjustment of the application image.
Basic results from lab tests can be used. Of course, these may have to be adjusted for the
individual device. The parameters nozzle size, opening time, opening stroke, material pres-
sure and if required, also temperature have to be combined.
For longer standstills, the material can remain in the valve, if it remains under pressure (no contact to outside
air).
6.3 Operating Elements
1
Manual release at magnetic valve (green button)
2
Adjusting screw for adjusting the after-supply air
3
Adjusting button for the raster-needle adjustment
1
2
3

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Assembly Instructions - Spray Valve SMS-02
Page 13 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
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7 Maintenance and Repair
7.1 General Information
The spray valves of the SMS-02 series are high-quality precision devices which will not fail if treated
correctly and will operate almost maintenance-free. All mobile parts should be regularly oiled and also the
threads should be greased when the nozzles are cleaned or exchanged. Always keep clean and observe
minimum instructions to maintain a long life of the valve. Always use clean and filtered material only. The
control air must also be clean, if necessary. Maintenance also depends on the individual operating conditions
and the type of media used.
CAUTION
Before starting any maintenance or repair work, ensure that all air-operated tools are
depressurized and disconnected from the air supply.
Before opening the spray valve it must be disconnected from the air and fluid supply.
Otherwise, ejected components can cause injuries.
7.2 Cleaning
IMPORTANT
Only use soft brushes for outside cleaning of the nozzle tips. Never use metal tools with
sharp edges.
Wash equipment thoroughly after use to remove residues and dirt, especially if needle (Pos.7.0.70), or
sealing sleeve (6.1.0) or material nozzle (Pos.2.1.0) have to be exchanged.
7.3 Exchanging the Air Valve (11.0.0)
Unscrew locking screw (11.1.0)
Remove spring (11.3.0)
Pull out locking piston (11.2.0)
Exchange O-rings (11.1.1 + 11.2.1) if necessary
Slightly grease and re-assemble in reverse sequence.
7.4 Exchanging the Return Check Valve, complete (10.0.0)
Unscrew locking screw (10.4.0)
Unscrew fastening thread pin (10.6.0)
Use a screw (M3) of sufficient length and screw it in instead of adjusting screw (10.4.0) in order to
carefully pull out the basic casing (10.1.0)
If necessary, also exchange the reversing sleeve (10.5.0) and the O-ring (10.2.0) as well as the O-ring
(10.3.0) on the unscrewed adjusting screw (10.4.0).
Slightly grease and re-assemble in reverse sequence.
7.5 Replacing the Needle (7.0.0) and the Nozzle (2.1.0)
Completely unscrew raster-needle lock (9.0.3)
Remove air cap (1.1.0) with retainer ring (3.1.0)
Unscrew nozzle (2.1.0)
Carefully push needle (7.0.0) from the nozzle side to the back
Re-assemble new, slightly greased parts in reverse order.
IMPORTANT
Nozzle set = Nozzle needle, nozzle and air cap (should always replaced at the same time)!
We do not recommend employing used needles. Leakages are caused by pricking needles
which are not completely clean through the shaped sealing (5.1.0).

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
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7.6 Exchanging the Sealing Bush (6.0.0)
Unscrew raster-needle lock completely (9.0.3)
Remove air cap (1.1.0) with retainer ring (3.1.0)
Unscrew nozzle (2.1.0)
Carefully push needle (7.0.0) from the nozzle side to the back
Then use a screwdriver to unscrew sealing bush (6.0.0) from the thread.
IMPORTANT
Due to the outside O-ring (5.3.0), the sealing sleeve cannot easily fall through the fastening
thread of the main body (4.1.0). Therefore an additional small strip of sheet metal (0.5 –1.0
mm) will be slid between the body gap and flat towards the front end of the sealing sleeve.
Then you can carefully push the sealing sleeve together with the O-ring (5.3.0) to the back of
the thread. Now the sealing sleeve can be easily removed from the casing.
7.7 Inserting Gaskets and O-Rings:
If you do not have a complete sealing sleeve (6.0.0) with integrated material sealing kit (5.0.0) available as
replacement, you have to remove the old gaskets and replace them by new ones.
For this purpose, you have to clean the sealing sleeve so that no residues from sprayed medium will hamper
the installation of the new gaskets. Slightly grease the O-ring holders with a lubricant (technical petrolatum).
First insert the O-ring (6.2.0) into the back boring to the bottom of the sealing sleeve.
Then insert the O-ring (5.3.0) into the outer groove.
Insert the shaped sealing (5.1.0) into the front holder. This shaped sealing is not symmetrical. Make
sure that the side with the larger boring points to the front when inserting it; it has to point towards the
nozzle after the installation of the complete sealing sleeve.
Slightly grease the complete sealing sleeve (6.0.0) and move it back into the main body (4.1.0); do not
turn when pushing it carefully through the fastening thread together with the outside O-ring (5.3.0), us-
ing a screwdriver.
After that screw the sealing sleeve into the thread (slightly tighten).
IMPORTANT
Do not use any metal or sharp-edged equipment or tools when inserting the O-rings and the
shaped sealing. The shaped sealing in particular is a very precise and sensitive part which has
outstanding sealing characteristics and should therefore not be hit or pressed.
7.8 Maintenance for Operation in Color-Marking Systems (Normal Operation)
The spray cap will be cleaned every other day with a special thinner and a soft cloth. Make sure that no cloth
fibers are left on the nozzle tip.
The material section of the spray valve should be cleaned with a special thinner every other week. Please
observe the following steps:
Needle lock (9.0.3) completely open (remember raster setting for later use!)
Remove air cap (1.1.0/x) and unscrew nozzle (2.1.0) with a SW 6 open wrench.
IMPORTANT
Hold spray valve downwards so that no medium can flow into the air channels. Discharged
medium will be collected in a container and disposed of later.
Clean with a soft (paint-)brush and a special thinner.
Re-assemble nozzle and air cap after cleaning.
Re-set the raster-needle setting.
A cleaning cycle will be initiated after standstills (e.g. breaks over night or on weekends). The nozzle will be
sprayed clean. This cleaning cycle will be activated through the system controls.
IMPORTANT
Use a dummy or a cloth during the cleaning cycle in order to avoid soiling!

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 15 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
Telefon: [phone] Telefax: [phone]
http://www.walther-2000.de –[e-mail]
After longer system standstills (e.g. 2-3 weeks), the complete system will be cleaned before re-start. If
necessary, the material hoses and if applicable, also the inlays of the pressure tank have to be re-
placed.
The material pressure container will be opened every week and the color will be thoroughly stirred (if
no agitator is provided).
The material pressure container will be cleaned every 3-4 months; material lines and inlays will be
exchanged.
IMPORTANT
Clean the complete system every six months!
7.9 Spare Parts
IMPORTANT
Only use original spare parts from the manufacturer!
Wrong or defective spare parts from other manufacturers can damage the device. If other
than original spare parts of the manufacturer will be used, all obligations from the manufac-
turer or his sales partners, such as guarantees, service contracts etc will be forfeited without
further notice.
7.10 Customer Service / Support
Walther Systemtechnik GmbH
Hockenheimer Straße 3
D-76726 Germersheim
Germany
Phone ++49(0)7274-7022-0
Fax ++49(0)7274-7022-91
Email [e-mail]
Internet www.walther-2000.de

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 16 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
Telefon: [phone] Telefax: [phone]
http://www.walther-2000.de –[e-mail]
8 Troubleshooting
8.1 General Information
IMPORTANT
First check all supply lines for connection and serviceability.
In case of serious problems that cannot be resolved, please contact the Walther Systemtechnik GmbH
customer service.
8.2 Failures:
Fault
Possible Cause
Action
Nozzle needle does
not open.
No electrical current (slight clicking-
sound at the magnetic valve )
Check electrical power supply
Not enough control air pressure
Check control air pressure (make sure it
set to 5-6 bar)
Leakages
Check O-ring (6.2.0), O-ring (7.4.0) or
O-ring (7.5.0) and replace if necessary
Needle (7.0.0) is sticky within the needle
sealing screw (6.1.0)
Disassemble and clean
Needle stroke is set too low
Turn left at raster-needle setting for
proper setting
Pre-supply/After-supply
air is constantly
blowing
Adjusting screw (10.4.0) was screwed in
too deep
Move adjusting screw back to basic
setting (see 4.3)
Locking piston (11.2.0) not suitable for
atomizer air pressure
Replace air valve (11.0.0) completely
(see spare parts list)
O-ring (11.2.1) on locking piston
defective
Replace O-ring
Medium leaks at slot
(covered by plastic
protection sleeve 5.4.0)
Leakage of material sealing
Complete overhaul of spray valve

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 17 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
Telefon: [phone] Telefax: [phone]
http://www.walther-2000.de –[e-mail]
8.3 Spray Image/ Type of defect
SPRAY IMAGE
PROBLEM
CAUSE
ACTION
Normal Spray Image (Flat jet)
Normal Spray Image (Round jet)
Spray image shaped
too much
upwards and
downwards
Soiled
air cap
Soiled
nozzle
Clean nozzles
Spray image too much
left-sided or right-sided
Soiled
air cap
Soiled
nozzle
Clean nozzles
Heavy application in the
middle of the spray image
Too much material
Material too thick
Reduce
material supply
Dilute material
Split
spray image
Too little material
Pressure flat jet too
high
Increase
material supply
Increase pressure
for round jet

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 18 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
Telefon: [phone] Telefax: [phone]
http://www.walther-2000.de –[e-mail]
9 Taking out of Service
9.1 Short Interruption
A short interruption (15 min or more) has to be followed by a fine spraying.
IMPORTANT
Please follow the Operating Manual!
9.2 Long-term Interruption
The following has to be observed for a long-term interruption of the device/machine:
Depressurize material supply lines
Take off air cap (1.1) and clean nozzle (2.1) with a special thinner and a soft cloth. Make sure that no
cloth fibers are left on the nozzle tip.
IMPORTANT
Please follow the maintenance instructions!
9.3 Final Shutdown of Device
The following is important for a shutdown of the machine / device:
Clean spray valve with a special thinner.
IMPORTANT
Please follow the maintenance instructions!

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 19 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
Telefon: [phone] Telefax: [phone]
http://www.walther-2000.de –[e-mail]
10 Appendix
10.1 Dimensioned Drawing (Flat jet)
10.2 Dimensioned Drawing (Round jet)

Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 20 of 34
Walther Systemtechnik GmbH –D 76726 Germersheim
Telefon: [phone] Telefax: [phone]
http://www.walther-2000.de –[e-mail]
10.3 Spare Parts Drawing SMS-02 (Standard)
IMPORTANT
Air control valve and return check valve are available only as complete!