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Rev. 1.1
8 Maintenance and Repair
8.1 General Information
The airless spray valves of the SMS-13 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 and 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 spray valve it must be disconnected from the air and fluid supply.
Otherwise, ejected components can cause injuries.
8.2 Cleaning
Wash equipment thoroughly after use to remove residues and dirt, especially if the nozzle needle (7), sealing
or airless nozzles have to be exchanged.
IMPORTANT
Only use soft brushes for outside cleaning of the nozzle tips. Never use metal tools
with sharp edges!
Always maintain utmost cleanliness during repair or replacement work; this applies to
the device as well as to the work area.
We recommend to disassemble the device from the machine or system for all major
repair or maintenance work (make sure that all supply lines are without pressure).
8.3 Installation and Replacement of a Nozzle Needle
Caution
Depressurize all connections!
Make sure all connections are without pressure. Unscrew the fastening screws (12) of the locking plate (11)
and remove the plate. Remove spring (8) and needle (7). Unscrew retainer ring (1) and pull out airless noz-
zle (not included in scope of delivery) and the sealing ring (2). Unscrew the nozzle holder (3). Reassemble in
reverse order.
When installing nozzles and nozzle needles which have already been in use, rinse the nozzle with a suitable
thinner to make sure that no residues of material remain. Also the needles shaft will be thoroughly cleaned
from residual particles. Needle shafts with cured material can cause damages at the sealing element (4 + 7).
8.4 Installation and Replacement of an Airless-Nozzle
Make sure all connections are without pressure. Unscrew retainer nut (1). Place airless nozzle on nozzle
holder (3). Make sure that the sealing (2) has been inserted before. Screw fast retainer nut (1).
Assembly Instructions - Spray Valve SMS-13
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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