IMPORTANT
Check that the sample flow unit can be eas-
ily inserted into the vaporizer and the adjust-
ment assembly and moved so that the two
lenticular gaskets are subsequently subject
to equal pressures when the plate springs
are tensioned.
n
Slide the adjustment assembly (4) with nut (41), Tef-
lon gasket and sample flow unit onto the tappet.
IMPORTANT: Mounting position
The internal hole of the sample flow unit is
tapered on the vaporizer side. Make sure
that it is inserted correctly!
n
Move tappet into filling position.
n
Only if you have completely dismounted the liquid
injection valve: fit the flange (8) over the vaporizer,
and screw the valve body (3) and the flange together.
n
Screw on the flange plate with vaporizer as far as
possible.
Adjustment assembly
Adjust such that the spring travel is approx.
2 mm. Fix hand-tight.
Standard setting with 7 plate springs:
nut 0.5 mm above end of screw.
Standard setting with 8 plate springs:
nut 0.5 mm below end of screw. Correct if
necessary when mounting.
The spring travel is not basically critical, but
should be greater with a high sample pres-
sure (20 - 30 bar) and smaller with a small
sub pressure (0 - 2 bar).
n
Check the spring travel, and correct using the adjust-
ment assembly if necessary. It is correctly set if the
flange can be rotated a further 2.5 rotations starting
with the first pressing of the plate springs until the
flange rests on the valve body. The plate springs can
be viewed through a hole when pressing together. If
the flange is tightened firmly, there should be a gap
of 0.3 to 0.5 mm between the plate springs.
n
If the pretension of the plate springs is too large or
too small, loosen the flange from the valve body
again, and screw the intermediate unit in or out of
the nut. Then repeat the preceding step.
n
Rotate the vaporizer (except the glass vaporizer) us-
ing a 6-mm fork spanner until the carrier gas inlet is
parallel to the sample flow unit. The carrier gas
should blow through the hole in the tappet when in-
jecting!
n
Position the control cylinder, and tighten using the
two hexagon screws on the side. The screws must
firmly grip the thread of the cylinder wall. If you en-
counter problems, rotate the screw to the outside us-
ing an Allan or Torx key.
n
Connect the control lines.
n
Activate pneumatically. Check the switching and
movement noises.
n
Connect the sample lines.
IMPORTANT: Strain relief
Hold the sample lines when connecting!
The sample lines must not be subject to
strain.
2 - VIII Register8.vp Stand: 20.11.2000
Liquid injection valve
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