Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 14 of 34
Walther Systemtechnik GmbH
– D 76726 Germersheim
Telefon: +49 (0)7274-7022-0 Telefax: +49 (0)7274-7022-91
http://www.walther-2000.de
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!
