Time pressure is a versatile method of dispensing that
functions across a wide range of viscosities. This
dispense method works by applying pressure to the syringe.
This pressure pulse is controlled by the software and can
be used to dispense either lines, fi lls, or dots. With an
appropriate fl uid and nozzle confi guration, very fi ne and
repeatable dots and lines can be dispensed.
This is a great addition
to fully automatic systems
The amount of pressure is automatically controlled through
the software. The amount of pressure is determined by a
relationship between the material being dispensed and
the application fl ow rate. When dispensing is fi nished, an
adjustable vacuum is applied to the syringe that prevents
material from dripping. The vacuum is adjustable to avoid
pulling air into the needle.
Syringe sizes from 5 cc to 30 cc may be used with the included
syringe kit. An optional level detect is available - it will notify
the operator when the material level gets low.
Cleanup using this method is very simple. Because material
is being dispensed directly from the syringe, the operator
may dispose of it after it is empty. Additionally, the needles
that are commonly used are disposable Luer-Lok® type. An
operator may change a syringe and needle, and re-calibrate
the system within a matter of two (2) minutes. Again, no
cleaning is required as all wetted parts are disposable.
The Liquid Dispense option prevents material drool when the
valve is not actively dispensing by maintaining a proper level
of vacuum to the syringe. Control of the vacuum applied to
the Liquid Dispense option during times when the syringe is
not dispensing becomes especially useful when using low
viscosity materials.
Time Pressure with
10 cc Syringe
Operation Diagram
Specifi cations
• Syringe Compatibility . . . . . . . . . . EFD or Semco: 5 cc, 10 cc, 30 cc
• Dispense Tips . . . . . . . . . . . . GPD S Type Luer or other Luer nozzles
• Viscosity Range . . . . . . 1 to 100,000+ cps. Consult GPD for details.
• Pressure Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 to 80 psi
• Minimum Pulse Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.030 s