Maintenance And Repair; General Information; Cleaning; Replacing The Nozzle And Nozzle Needle - Walther Systemtechnik SMS-22 Assembly Instructions Manual

Rev. 1.3

8 Maintenance and Repair

8.1 General Information

The spray valves of the SMS-22 series are high-quality precision devices which will not fail if treated correct-
ly 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

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 the nozzle needle (Pos.12),
the sealing sleeve (11.3) or the material nozzle (3) has to be exchanged.

8.3 Replacing the Nozzle and Nozzle Needle

First take pressure off all connections and disconnect material supply! Loosen retainer ring (1) and remove
air cap (2). Loosen locking screw (6). Important! Carefully remove locking screw as it is under spring
pressure! Carefully pull out nozzle needle (5) from main body (4). Unscrew nozzle (3) with open-end wrench
SW6. Slightly grease new nozzle needle (5) and insert. Carefully wipe off grease from needle tip. Screw in
new nozzle (3) with open-end wrench SW6. Important! Always replace nozzle (3) and nozzle needle (5)
at the same time. Screw tight locking screw (6). Put on air cap (2) and tighten with retainer ring (1).
IMPORTANT
Nozzle set = nozzle needle, nozzle and air cap (should always be replaced at the same
time)!
IMPORTANT
When installing nozzles and nozzle needles which have already been in use, rinse the noz-
zle 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.
Assembly Instructions - Spray Valve SMS-22
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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