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Cleaning VTK - TR -BA- 171e - 1 - User Manua l MDS 3080 -V 137 Step 9 (cartridge base) Unscrew the tighte ning scre w with the help o f the MDT 327, rotati ng counter - clockwi se. Remov e the tighten ing sc rew an d the…
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VTK-TR-BA-171e-1 - User Manual MDS 3080-V
Step 3 (cartridge)
Unscrew the cartridge counter-clockwise and
remove it from the fluid box. If necessary, use the
MDT 309 - Cartridge locking pin.
Important Note!
Make sure that no medium spills into the machine.
Step 4 (tappet)
Pull the tappet from the fluid box. Pull the tappet
spring from the tappet rod.
Step 5 (nozzle fixation nut)
Remove the nozzle fixation nut by screwing
counter-clockwise. Use the MDT 327 - Multi-
Function Tool.
Step 6 (nozzle insert)
Use the thin end of MDT 323 - Nozzle Insert –
Squeezing Out Tool TA, to push out the nozzle
insert from the fluid box.
Important Note!
Immediately use a cleaning wire to push through
the channel of the nozzle insert, to avoid
hardening of residue medium.
Step 7 (tappet centering screw)
Unscrew the Tappet Centering Screw BY from the
fluid box (counter-clockwise). Use the MDT 303 -
Nozzle Insert Changing Tool.
The three pins of MDT 303 have to fit exactly into
the three holes of the Tappet Centering Screw BY.
Turn the MDT 303 counter-clockwise while
pressing it down slightly to the fluid box. Combine
the MDT 303 with MDT 327 for a better leverage.
Step 8 (tappet sealing and tappet centering
piece)
Disengage the tappet centering piece and tappet
sealing from the fluid box. Use the thicker side of
tool MDT 323 (as shown) or the thicker end of the
MDT 328.
Important Note!
When using a 2G Tappet rod, you do not need a
tappet centering piece.
Cleaning
VTK-TR-BA-171e-1 - User Manual MDS 3080-V
137
Step 9 (cartridge base)
Unscrew the tightening screw with the help of the
MDT 327, rotating counter-clockwise. Remove the
tightening screw and the cartridge base from the
fluid box.
Important Note!
There are two types of cartridge bases: Cartridge
Base CH (without integrated luer lock) and
Cartridge Base CHI (with integrated luer lock). If
you use a Cartridge Base CH, you need to screw off
the fluid box connector Luer Lock. Unscrew it
(counter-clockwise) with the open-ended wrench
of the MDT 327 (hexagon screw size M8).
Step 10 (O-ring)
Remove the O-ring from the fluid box body. Pull it
off carefully with a pair of tweezers. Be careful not
to damage the O-ring.
Caution!
You could omit this step, only if the solvent you
use is compatible with the material of the O-ring.
Unusual (connector BY)
Usually you will not remove the Connector BY
from the fluid box body. In case the connector is
clogged, use MDT 327 to screw it out (counter-
clockwise; for newer revisions of the Connector BY
you can also use a hexagon key 2.5).
Tab. 29: Disassembling of the valve
CAUTION
Damaged tappet sealing
Only use the tools recommended by VERMES. Do not use a sharp tool to press the tappet sealing
from the fluid box. It could cause damage to the tappet sealing, which might lead to a leakage.
9.4.4 Fine Purification
Preliminary steps:
– Push a cleaning rod or a fluidic brush through the media carrying channels of all the
components.
First, clean the single components in an ultrasonic bath.
– Place a beaker in the ultrasonic bath. Make sure it is large enough.
– Place the nozzle insert, tappet sealing, tappet centering piece, cartridge base, tightening
screw, nozzle fixation nut and the fluid box body in the beaker.
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VTK-TR-BA-171e-1 - User Manual MDS 3080-V
CAUTION
Damage of O-ring/tappet sealing
Unless the compatibility between the O-ring/tappet sealing and the solvent is excellent, do not
insert the O-ring/tappet sealing into the solvent.
CAUTION
Damage of components
Place tipped nozzle inserts (e.g. J-, C-, N27-type) in a separate beaker. To avoid damage, do not
place tipped nozzle inserts together with other components in one beaker.
– Fill the beaker with an appropriate solvent (e.g. Isopropanol), until all of the parts are covered.
– Leave the components for ca. 15 min inside.
WARNING
High temperature, danger of burns
Be aware of your dispensing medium when setting the temperature, if the dispensing medium is
inflammable. Otherwise, with too high temperatures deflagration might occur. Set the
temperature as low as possible within the effective range.
– Take the beaker with the components out of the ultrasonic bath. Then use tweezers to take
the components out of the beaker.
Next, clean all components by hand.
– For fine purification, you have to clean all components by hand. In general, you should take
special care about those places, which get in contact with the medium or where two different
parts fit together. First, you should clean the nozzle insert, since hardening would cause most
problems here.
INFORMATION
Simpler cleaning
For some uncomplicated media it is possible to clean the parts just by using a fluid like ethanol
and compressed air, which can simplify the cleaning process. Before you try it, you should always
contact our Technical Support.
INFORMATION
Nozzle inserts with small inner channel
If a nozzle insert with inner channel smaller than 100 µm (except for nozzle inserts with long
dispensing channels, namely J-/C-series, N-27 and N-28) happens to be still clogged after