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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 dispens-
able material.
•
The system has been purged, filling the valve
with material up to the Piston(4).
•
The Piston (4) is seated in the Needle Seat (1).
2. The dispense cycle begins when the controller is
activated. Air at 70 psi (4.8 bar) enters the Open
port and raises the Piston (4) off the Needle Seat
(1).
332094C
3. Material flows through the Valve Body (5) and out
through the Needle Block (23). Volume can be var-
ied by changing the material pressure, needle size,
dispense speed and dispense time.
4. When the correct amount of material has been dis-
pensed, the controller relieves air from the Open
port and applies air to the Close port. The Piston (4)
seats back into the Needle Seat (1), sealing the
valve and ending the dispensing process. The sys-
tem is again in the normal "ready" state.
Description of Operation
9
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