Operating Instructions Diaphragm Valve GV - 1625
8
Attention:
Do not turn the tting too deep into the valve.
4. Screw a suitable dispensing needle into the Luer Lock connection on the
material outlet.
5. Set the material pressure as follows (but max. 5.0 bar). Set the material
pressure to max. 0.5 bar if you want to dispense very thin material (such as
water or solvent). Set the material pressure for highly viscous material to
approx. 2.0 bar and adjust it according to the required dosage.
6. On delivery, the adjusting screw is set to position 3 (middle of full stroke).
Increase or decrease the setting as needed. The max. stroke is 0.6mm. This
corresponds to one complete turn of the adjusting screw.
Attention:
If you turn the adjusting screw counterclockwise 2 turns or more, the
return spring loses its eect and the valve opens continuously. This
means that material is constantly metered, even if there is no control
pressure.
7. Adjust the settings of the valve, the material pressure and the controller so
that the material comes out of the valve slowly.
(This prevents bubbles from forming in the dosing material during dosing).
8. Select the operating mode "Timer" or "Manual" on the controller depending
on the desired dosage.
9. You can inuence the dosing result via the following 4 possibilities:
Dispensing needle
diameter
Thin dispensing needle reduces the dosing
quantity. Thick dispensing needle increases
the dispensing quantity
Adjusting screw for
stroke adjustment
High stroke setting increases the dosing
quantity. Low stroke setting reduces the
dosing quantity
Dispensing
time
Long dispensing time increases the dosing
quantity Short dosing time reduces the
dispensing quantity
Increase or decrease the
material pressure
Pressure increase leads to an increase in
the dispensing quantity
Pressure reduction leads to a reduction in
the dosing quantity
