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781Mini Series Spray Valve
9
Making the System Connections (continued)
For complete installation, setup, and testing instructions, refer to the controller operating manual.
ValveMate 7140 System with a 781Mini Valve
Always de-pressurize the fluid reservoir before opening it. To do this, slide the shutoff valve on the air line away from the reservoir.
Before opening the reservoir, check the pressure gauge to verify that pressure is zero (0). If using an EFD tank, also open the
pressure relief valve.
On all EFD cartridge reservoirs, the unique threaded design provides fail-safe air pressure release during cap removal.
CAUTION
1.
Connect the valve actuating air tubing
(white) and the nozzle air tubing
(black) to the corresponding outputs
on the back of the 7140 controller.
2.
Connect the constant air supply to
the 5-micron filter / regulator.
3.
Install the syringe barrel reservoir
on the fluid inlet fitting (for use with
Optimum syringe barrels) and connect
the fluid supply to the valve. For low
viscosity fluids, fill the reservoir after
installing it on the fluid inlet fitting.
NOTE:
Fill syringe barrel reservoirs no
more than 2/3 full.
4.
Attach the syringe barrel adapter
to the barrel reservoir using the air
interconnect coupler to connect the
adapter to the fluid pressure regulator
air line.
5.
Set the fluid pressure regulator to
low for thin fluids and higher for thick
fluids.
6.
Use the MODE button on the
ValveMate controller to place the
controller in the PURGE mode. In the
PURGE mode only, channels 1 and
2 can be selected
independently
without nozzle air pressure.
7.
Use the stroke control knob on the
781Mini valve to adjust the pattern.
Lower strokes (< 5) will produce
smaller patterns. Check the flow rate
by actuating the controller in the TIME
OVERRIDE mode.
NOTE:
Make valve stroke
adjustments only when the valve is
not cycling.
8.
Set the nozzle air pressure to 0.7 bar
(10 psi) and actuate the controller.
The valve will produce a fine spray.
To change fluid flow, use the stroke
control knob and / or the reservoir
pressure. To change the nozzle air,
use the nozzle air pressure regulator
(located on the front of the 7140).
Higher pressures will provide finer
spray.
NOTE:
The 5-micron filter / regulator
assembly is not included. Order
separately:
7020584: 0–100 psi filter / regulator
7020585: 0–15 psi filter / regulator
NOTE:
The area of spray coverage is determined (1) by the distance between the spray valve nozzle and the work surface and
(2) by the stroke adjustment and fluid pressure. Refer to “Round Pattern Spray Area Coverage” on page 10 to determine the
distance.
5-micron filter /
regulator
781Mini valve
Fluid inlet fitting
Plant air
4.8–6.8 bar
(70–90 psi)
ValveMate 7140
Controller
Constant fluid pressure
Fluid pressure
regulator
Constant air
Valve
actuating air
(white)
Nozzle air
(black)
30 cc syringe barrel
