8
7
Troubleshooting
Problem Possible
Cause
Correction
No liquid flow
If pneumatic valve operating
pressure is to low, the valve
will not shift.
The reservoir pressure may
not be high enough
Displacement rod may be in
forward position
The dispense tip may be
clogged.
Increase air pressure to 60
psi (4 bars) minimum
Increase pressure
Insure that the normally open
airport is energized
Replace tip
Fluid drools after
the volumetric
valve is cycled,
eventually
stopping.
This is caused by air coming
from the reservoir into the
fluid body and pumped out
into the lure check valve.
The air will expand after the
check valve closes, causing
product to extrude out the
dispense tip until the air
reaches atmospheric
pressure.
Prime the Loctite EQ VA20
Volumetric Valve by rotating
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.
Liquid drips at a
steady rate after
the valve closes.
A steady drip can be caused
by excessive reservoir
pressure.
The Luer Check Valve is not
closing fully due to particle
build up on the ball and seat.
Check reservoir pressure to
ensure it is not above 70 psi
(4.8 bar)
Remove the luer check valve
body, inspect sealing surfaces
and ball surface. Clean or
replace ball if contaminated
with particulate.
Liquid flows out of
the drain hole
Fluid leaking out of the drain
hole indicates a seal failure.
Replace seal in accordance
with maintenance instructions
