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DESCRIPTION OF OPERATION
1. The normal “ready” state of the system is as follows:
The material supply line is filled with
dispensable material.
The system has been purged, filling the valve
with material up to the Spool (2).
The Spool (2) is seated in the lower Posipak
Seal (6).
2. The dispense cycle begins when the controller is
activated. Air at 70 psi (4.8 bar) enters the Open
port and extends the Spool (2) through the lower
Posipak Seal (6).
3. Material flows through the Material Inlet (3), around
the narrow section of the Spool (2) and out through
the Nozzle (5) (or Needle (12). Volume can be
varied by changing the material pressure, nozzle
size, dispense speed and dispense time.
4. When the correct amount of material has been
dispensed, the controller relieves air from the Open
port and applies air to the Close port. The Spool (2)
retracts into the lower Posipak Seal (6) “snuffing” the
material back into the Nozzle (5), sealing the valve
and ending the dispensing process. The system is
again in the normal “ready” state.