EFD 800 User Manual

Using the Vacuum Control
The vacuum control allows low viscosity fluids,
even water, to be consistently dispensed without
dripping between cycles. The vacuum exerts a
negative pressure on the fluid in the barrel and
prevents dripping.
For these tests, you will use the test barrel with the
clear fluid.
1. While holding the barrel upright in one hand,
remove the orange end cap and insert the
white SmoothFlow
™
piston. Carefully press
the piston down until it contacts the fluid.
Be sure to push it far enough to remove all air,
but not into the fluid, since this will force the
fluid up along the sides of the piston.
2. Attach the barrel to the yellow adapter head.
Snap the safety clip tightly closed to prevent
any dripping or bubbling. Remove the tip cap
and attach the 25 gage (red) tip.
3. Set air pressure at 5 psi (0.4 bar).
4. With the barrel pointing downward over a
container, press the foot pedal to fill the tip.
Remove
tip cap
Insert
SmoothFlow
™
piston
Remove
orange
end cap
5. If a drop begins to form at the end of the tip,
slowly turn the vacuum control knob counter-
clockwise to stop the drop from growing.
Wipe the tip and slowly adjust vacuum as
necessary.
6. Take the barrel and place the tip on the Dot
Test Sheet. Press the foot pedal and release.
Check the deposit. You control the fluid flow
Regardless of the viscosity of the fluid you use,
you should try using the SmoothFlow
™
piston (see
pages 10-11).
If you choose not to use the piston, please read the
following points. rate by increasing the air pres-
sure output (higher flow) or decreasing the air
pressure output.
Do not tip the barrel
upside down or lay flat.
This will cause the fluid
to run into the dispenser.
When changing tips or attaching
a tip cap, snap the safety clip
completely closed to prevent any
dripping or bubbling.
Three things to remember
If you do not use the piston
when dispensing thin fluids:
Use an EFD filter trap
(#1000FLT-Y). This filter trap
will impede the flow should the
low viscosity fluid be sucked
back towards the dispenser.
Open
Closed

EFD 800 Specifications

General

Brand	EFD
Model	800
Category	Dispenser
Language	English