7 / Adjusting the Spray
Adjusting the Spray
1. Turn the nozzle air pressure on the
controller to zero. Using the nee-
dle stroke control knob
➀
on the
781S valve, set the fluid flow rate
to one or two drops per second.
Check flow rate by actuating the
controller in the time override
mode. Make valve stroke adjust-
ments when the controller is off.
2. Set the nozzle air pressure on the
controller to 10 psi (0.7 bar) and
actuate the controller. The valve
will produce a fine spray.
3. To change fluid flow, use the
needle stroke control knob
➀
,
and/or tank air pressure.
Note:
Avoid tight stroke settings with high
tank pressure.
4. To change nozzle air, use the nozzle
air pressure regulator
➁
. Higher
pressures will provide finer spray.
To Make Timed Deposits
1. Return to the time control by press-
ing the time override button
➂
. The
display should show the time setting.
2. Adjust the deposit time to 0.5 sec-
onds by using the time set
➃
and
decimal
➄
buttons.
3. Press the cycle button
➅
. The con-
troller will open the valve for 0.5 sec-
onds. Adjust time and test deposits
until desired output is obtained.
➀
VALVEMATE
7040
➁
➂
➃
➄
➅
Note:
Optimal results will be obtained
with the proper combination of time
setting, needle stroke control knob,
and reservoir and nozzle air pressure.