pag
. 5
3.4 Setting of the dispensed shot
Adjusting the needle stroke determines the amount of fluid dispensed.
To adjust the stroke, use the adjustment knob on the upper part of the valve.
Turn clockwise to decrease the needle stroke and consequently the adhesive amount.
Turning clockwise and coming to the end of the stroke, the valve will be completely closed, so it will not supply fluid.
Turn counterclockwise to increase the needle stroke and then the amount of fluid.
3.5 Amount of the shot
Adjusting the amount of material (fluid) is determined by:
> Diameter of the nozzle (0.5 - 0.8 - 1.0 - 1.5)
> Fluid pressure
> Pin stroke adjustment
Acting on these factors, you can adjust the amount of material you want.
Do not tighten the needle setting too firmly to avoid damaging the needle and nozzle.
Do not use metallic, pointed or sharp objects for cleaning, use only soft brushes or cotton cloths.
4 MAINTENANCE
4.1 General rules
The DAS 90 Spray Valve, thanks to the construction methods and materials used, is easy to maintain.
A minimum, simple, accurate and constant maintenance allow a long-lasting and regular operation of the valve, keeping
its performance unchanged.
4.2 Cleaning and replacing the nozzle
Before disassembling and cleaning the nozzle the following operations
must be performed:
1) Wash the valve
2) Release the pressure from the system
3) Unscrew the ring nut and remove the air cap
4) Loosen the needle adjustment by turning the grain or knob counter-
clockwise.
5) Unscrew the nozzle (Pos.17) with a 7 wrench
After removing the nozzle:
1) Put the nozzle under running water and then blow carefully with
compressed air and clean the nozzle hole.
2) Repeat the operation until all the impurities present are removed.
3) Screw the nozzle back (pos. 17) with a 7 wrench.
Key 7
SPRAY VALVE DAS 90
