Using the Vacuum Control Feature for Low Viscosity Fluids
The vacuum control feature allows you to dispense low viscosity fluids consistently without dripping between
cycles. The vacuum overcomes head pressure on the fluid within the barrel, which prevents dripping.
1. Make sure that you have attached an EFD barrel filled with the fluid intended for
dispensing, and that the air pressure is turned all the way to zero. EFD recommends
the use of a Blue LV Barrier piston for watery, low viscosity materials.
2. Remove the tip cap and replace it with an appropriate EFD precision dispense tip.
Dispense tips are listed on the components poster included with your Performus
system.
3. While pointing the tip over a container or resting on a test surface, release the safety
clip on the adapter hose assembly.
4. Depress the foot pedal for the duration of this setup.
5. Slowly turn the air regulator adjustment knob up until fluid starts to exit from the tip.
6. Keep increasing the air pressure until you have reached the desired fluid flow rate.
7. Release the foot pedal. At this point, fluid will continue to exit the tip.
8. Slowly turn the vacuum control knob clockwise until the fluid deposit size stabilizes without growing.
NOTE:
Do not increase the vacuum to the point where the deposit is actually sucked back into the tip.
Excessive vacuum causes inconsistent dispensing.
9. Lift the tip off the paper, wipe the tip end, and retest by pressing the foot pedal momentarily. The deposit
dispensed should stay at the intended size and not increase or decrease in size. If it does, repeat steps 4–8 to
fine-tune the vacuum control.
1/2 maximum fill
LV Barrier
Air gap
System Setup and Operation (continued)
Performus I Dispensing System
15
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+1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
