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Rev. 1.1
8 Maintenance and Repair
8.1 General Information
The valves of the VMS-05 series are high-quality precision devices which will not fail if treated correctly and
will operate almost maintenance-free. 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 and
should be slightly oiled, 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 dosing pen it must be disconnected from the air and fluid supply.
Otherwise, ejected components can cause injuries.
8.2 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 nozzle needle, sealing
bushing or nozzle have to be exchanged.
Use the thinner for sprayable media as detergent. A daily cleansing rinse will remove residues of the
sprayable medium and clean almost all parts and channels which have been in contact with the sprayable
medium.
8.3 Replacing Needle and Nozzle
CAUTION
First depressurize all connections.
Standard Needle (8) and Nozzle (1)
First unscrew screws (14) and then remove valve from device body (13). Completely unscrew needle lock
(10, 11 or 12). Unscrew nozzle (1). From the nozzle side, carefully push out needle (8) to the back. Re-
assemble with slightly greased new parts in reverse order. We do not recommend reusing old needles.
Piercing of slightly dirty needles through the needle gaskets (pos. 5.1) can cause leakages.
Special Design Needle (7.10) and Nozzle (2.10)
Completely unscrew raster-needle lock (pos. 9.02) and nozzle (pos. 2.10). Remove needle spring (8.10) and
carefully push out the needle (pos. 7.10) towards the nozzle end. Re-assemble with slightly greased new
parts in reverse order. We do not recommend reusing old needles. Piercing of slightly dirty needles through
the needle gaskets (pos. 5.50) can cause leakages.
Assembly Instructions - Full-Jet Valve VMS-05
Walther Systemtechnik GmbH – D 76726 Germersheim
Telefon: +49 (0)7274-7022-0 Telefax: +49 (0)7274-7022-91
http://www.walther-2000.de – info@walther-2000.de
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