VTK-VS-BA-015e-A | User Manual MDS 3200+ Series
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Product Description
27
Module
(1)
accommodates the electronics, required to receive signals from actuator and sensor.
The connectors for sensor and actuator cable are integrated in the surface of the case; they have to
be linked to the control unit.
The actuator system
(2)
, representing the core of the microdispensing valve, houses the sensor, the
piezoelectric element and the mechanics to drive the tappet. Actuator case and mechanics are
sealed for protection against dust and contamination.
The fluid box
(3)
is thermally isolated from the actuator system. Its purpose is to transport the liquid
from the cartridge or the tank
(different configurations are available, see page 112)
to the nozzle
unit. In order to simplify independent cleaning, this module can easily be disengaged from the valve,
just by opening two screws. Information how to assemble a fluid box you can find in chapter 8.3.5.
The nozzle unit
(4)
includes the nozzle adjusting nut, the tappet guidance and the O-ring. The nozzle
insert is a separate item, easily to be cleaned and to be exchanged in case of need
(this item has to
be considered as a wearing part)
. The user may choose from a large number of insert types, accord-
ing to the current application.
The MNL screw
(5)
is an adjusting screw. It is used to limit the needle lift mechanically, independ-
ent of the actuator. This helps to provide a momentum in accordance with the max system power,
even if the movements of the tappet are very small. It is especially helpful to create very small
dots. To turn the MNL screw, you can either use tool MDT 302 or the universal tool MDT 301. Only
the MDV 3200F has got an MNL screw.
CAUTION! (Open MNL screw)
Before each adjust make sure to open the MNL
screw completely.