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 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).

3.Material flows through the Valve Body (5) and out through the Needle Block (23). Volume can be varied by changing the material pressure, needle 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 Piston (4) seats back into the Needle Seat (1), sealing the valve and ending the dispensing process. The system is again in the normal “ready” state.