Do not completely fill syringe barrels. The optimum fill is a maximum 2/3 of the barrel capacity and 1/2 of the barrel
capacity when using the EFD blue LV Barrier
™
piston.
CAUTION
For best results, we strongly recommend
that you use a piston as part of your
dispensing system. The white EFD
SmoothFlow piston is appropriate for most
fluids and has several advantages:
• First, vacuum adjustment is less sensitive.
• Second, the piston prevents fumes from
the fluid being exhausted into the work
environment.
• Third, the piston prevents fluid backflow
into the dispenser if the syringe barrel is
inadvertently turned upside down.
• Fourth, the piston makes it easy and safe
to change tips without dripping.
For watery solvents and cyanoacrylates,
request the blue EFD LV Barrier piston,
available in 3cc, 10cc, and 30cc sizes. If you
are dispensing an RTV silicone and find that
the piston bounces and causes stringing,
request the EFD Clear Flex piston.
Filling Procedure for Pourable Low and
Medium Viscosity Fluids
If the fluid you are dispensing is pourable, take the syringe barrel, twist on
a blue tip cap, and pour your fluid in. Insert a white SmoothFlow piston
and carefully press down until it contacts the fluid. The syringe barrel is
now ready for use.
Filling Procedure for Thick Fluids
If your fluid is thick or non-leveling, you can spoon it into the syringe barrel
with a spatula. Or, if the fluid comes packed in a 300 ml (1/10 gallon)
cartridge, try loading the barrel with a caulking gun. Then, press the
SmoothFlow piston to move the fluid to the bottom of the syringe barrel
and remove trapped air.
Trapped air in thick fluids can lead to drooling and oozing. Also, repetitive
air cycles can bore tunnels through non-leveling fluids, causing spitting
and inconsistent deposits. The SmoothFlow piston eliminates these
problems. It prevents tunneling by providing a barrier to the pulsed-air
cycles. And it prevents oozing by responding to the pressure of trapped air
with a slight suck-back movement after the dispense cycle.
2/3 maximum
fill
2/3 maximum fill
SmoothFlow piston
Caulking gun
Filling the Syringe Barrel
Remember
For best results, EFD strongly recommends the use
of a piston as part of your dispensing system.
Do not tip the barrel upside down or
lay it flat. This will cause the liquid 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.
Open
Closed
Fumes cannot escape.
No air gap
when using the
SmoothFlow
piston.
SmoothFlow piston prevents fluid backflow.
If you choose to not use a piston when dispensing
thin fluids, remember these important points.
Ultimus I–II High Precision Fluid Dispensers
26
www.nordsonefd.com [email protected]
800-556-3484 Sales and service of Nordson EFD dispensing systems are available worldwide.
