Dispensing different materials Any liquid or paste can be dispensed with control using our dispensing systems. Low viscosity liquids, such as solvents and marking inks, are no exception. Always consider the recommendations and cautions of the material manufacturer, as the fluid being dispensed should be compatible with the pulsed air application method and the polypropylene barrel. When dispensing from a valve, the valve must be suitable for the material.
Cautions in dispensing
When using "suck-back," avoid rapid vacuum pressure increases and prevent vacuum pressure from pulling liquid into the air hose.
Avoid tipping the barrel and allowing the liquid to run into the dispenser.
Only new barrels and tips should be used, and used ones should be carefully disposed of after use. Do not use toxic cleaning solvents and avoid liquid contamination.
Material handling
Cyanoacrylates:
Handle carefully. Avoid all skin contact. Adjust the vacuum with extreme caution and do not allow the cyanoacrylate to run back through the airline to the dispenser. Always use a safety clip on the adapter hose when changing the tip to prevent dripping and material being sucked into the controller.
Anaerobics:
The same precautions should be enforced as with cyanoacrylate.
Epoxies:
Using normal methods, one-part epoxies can be dispensed without problems.
When dispensing two-part epoxies, always remember that in the epoxy curing process the viscosity will change with time, thus affecting the dot size.
The controls of the dispenser will need to be adjusted to compensate for the viscosity increase as the material ages.
Solder and brazing pastes:
Precise control is achieved with dispensing. For precise micro shots of solder pastes, the positive displacement screw valve is recommended. Care must be taken when transferring or loading paste into barrels to avoid air entrapment.
Silicones, masks & solder resists:
Use normal dispensing procedures.
Adhesives:
All adhesives dispense well. By using a small tip, "stringing" may be eliminated.
