6
5
Operation
•
The
Loctite® EQ VA40 CA Volumetric Valve
is ready to dispense - control lines are
installed; pressure reservoir is loaded with adhesive and a feed line is attached to
the product inlet fitting. 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 setup for drop
dispensing:
1.
A dispense tip is inserted onto the Luer Check Valve and secured with the Tip
Retainer Nut.
2.
To prime the Loctite® EQ VA40 CA Volumetric Valve rotate t
he Luer Check Valve
counterclockwise 2 1/4 rotations. When a steady flow of bubble free adhesive is
observed rotate the Luer Check Valve clockwise and tighten. Cycle
the Loctite® EQ
VA40 CA Volumetric Valve 5 to 10 actuations and repeat priming. This action will
dislodge air under the diaphragm seals.
3.
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
shortened. The stroke is set by loosening the locking set screws and rotating the
stroke adjuster counterclockwise to decrease the stroke.
Maximum Stroke
Stroke Adjuster is Flush
Drop Size ~ 6.0
µ
l
Minimum Stroke
–
Rotate stroke
adjuster counterclockwise 2.25
revolutions. Drop Size ~ 1.4
µ
l
2.25 revolutions
Locking set
screw
Locking set
screw
