User`s guide

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India+ 91 80 4021 3600 Asia +China: [phone]
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