Rev. 1.4
Assembly Instructions - Micro Point Pulse Valve MPP-SPEED
Page 12 of 17
Walther Systemtechnik GmbH
– D 76726 Germersheim
Telefon: +49 (0)7274-7022-0 Telefax: +49 (0)7274-7022-91
http://www.walther-2000.de
8.2 Cleaning
Wash device thoroughly after use to remove residues and dirt.
IMPORTANT
Only use soft brushes for outside cleaning of the nozzle tips. Never use metal tools
with sharp edges; see also Article No. 979444.
Free-Spraying of Nozzle
Should the nozzle of the MPP-Speed be clogged by dirt or changes in the medium, there are several options
for re-enabling proper functions.
CAUTION
There is the potential of seriously damaging or destroying the nozzle.
Increase the pulse frequency
Increasing the pulse frequency can remove solids and particles from the nozzle which can then be pulsed
off.
Example: opening time valve = 500µs, break time valve = 3000µs, number of shots 50
Rinsing with solvents
Rinsing with solvents will remove dried contamination from the nozzle. The effect can be enhanced by
simultaneously increasing the pulse frequency.
Ultra-sonic bath
Heavy contamination in the nozzle can be removed by placing the nozzle itself in an ultra-sonic bath. For this
purpose, the system has to be depressurized so that there is no more media pressure at the pulse valve.
Then unscrew the nozzle from the valve body and place it in the ultra-sonic bath.
Cleaning with a cleaning needle
You have to be extremely careful when cleaning with the cleaning needle (part of the cleaning kit). Carefully
and slowly insert the needle into the boring of the nozzle until you can feel a slight resistance.
8.3 Replacing Nozzle
CAUTION
Ensure that the valve is depressurized and disconnected from the air supply. Unscrew noz-
zle and deposit it in solvent if contaminated. Reinsert and screw tight cleaned nozzle.
.
IMPORTANT
Make sure that the O-ring at the upper part of the valve is not lost or damaged. If
necessary, slightly grease the nozzle shaft. The sealing ring is inserted below the
material connection.
