7
5
Operation
The Loctite EQ VA20 Volumetric Valve Air is ready to dispense - control lines are
installed, pressure reservoir is loaded with adhesive and a feed line is attached to the
fluid body. The pneumatic pressure to the controller is set at 4 bars and the reservoir
pressure is set at 2 bars. The system is now ready to set- up for drop dispensing:
1.
A dispense tip is inserted onto the Luer Check Valve and secured with the Tip Retainer
Nut.
2.
The drop size is determined by the length of the stroke which the displacement rod
travels into the displacement chamber. The drop decreases as the stroke is shorten.
The stroke is set by loosening the clamping screws and rotating the stroke adjuster
clockwise to decrease the stroke. The maximum stroke is approximately 9.5 mm [0.374
inch] and the minimum stroke is approximately 1 mm [0.039 inch].
3.
To prime the Loctite EQ VA20 Volumetric Valve rotate the Luer Check Valve
counterclockwise 2 1/4 rotations. When a steady flow of adhesive is observed rotate the
Luer Check Valve clockwise and tighten.
4.
The Loctite EQ VA20 Volumetric Valve is ready to dispense. Set actuation rate at greater
than or equal to 0.166 seconds.
5.
Cycle the Loctite EQ VA20 Volumetric Valve 5 -10 times than measure drop size. Adjust
stroke to suit.
6
Application Hints
The Loctite® EQ VA20 is specifically design to dispense drops of Loctite Light Cure
Adhesive. This adhesive cures in the presents of light. Caution should be used to protect
the dispense tip from ambient light.
