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5.1 Controller
Operation of the 1230 dispense valve, requires the use of a pneumatic, cycle sequencing, controller.
Dispensit offers the optional 4134 Pneumatic Controller, as seen in figure 4, which when triggered by
either a foot switch or toggle switch, can control the dispense valve and the optional Dispensit 1105 Z-Lift
station. The 4134 Controller can operate the following:
•
Time/cycle speeds
•
Cycle sequencing
•
Independent air pressure regulators for material reservoir, valve cycling and Z-Lift operations
•
Automatic or semi-automatic applications
The yellow port will extend the metering rod allowing the valve to dispense material, and the green port
will retract the metering rod allowing the valve to reload with material. The auxiliary port will apply a
constant flow of air pressure for the diaphragm check valve. The auxiliary port air pressure (for the
diaphragm check valve) is typically set to 5 to 10 psi above material inlet port pressure.
NOTE: The auxiliary port (for the diaphragm check valve) air pressure is not to exceed 70 psi.
Lowering the diaphragm check valve air pressure until material flows will purge the 1230 valve.
5.2 Plastic Metering Rod
Use of a high quality, wear resistant, plastic metering rod provides a wetted section (Wet Head) free of
metallic components. Such a configuration can be beneficial for applications handling especially strong
acids (certain fluxes), and for anaerobic materials (thread lockers).
5.3 Needle Blocks
The 1230 dispense valve has the option of dispensing material through a single luer lock needle of various
gauges, or a custom designed multi-needle block as illustrated in figure 5. An adapter block is used to
accommodate custom designed single or multiple needle dispense blocks for applications requiring precise
needle lengths or, more than one dispense location or height.
Optional Equipment
Figure 4. Pneumatic Controller
Figure 5. Adapter with Multi-Needle Block Assembly
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