For work on the unit, you need the
following tools:
Torque wrench to DIN EN ISO 6789
Hexagon keys to
EN ISO 4762 / ISO 272
Open-ended spanners to
EN ISO 4762 / ISO 272
The properties of the tools, such as the
size or measurement range, depend on
the type and size of unit.
Select tools suitable for the work to
be carried out.
For work on the actuator, it is neces-
sary to have sufficient working clear-
ance. This depends on the type of unit
and the local options fitted.
It must be possible to work safely on
the device and to remove it if neces-
sary.
When necessary, you must carry out
the following maintenance work:
➢ Check that the unit operates cor-
rectly if it is not in regular use.
➢ Make a visual inspection of the
cable connection to the unit for po-
rosity.
➢ Check all adapter connections be-
tween the unit and the valve.
➢ Check the unit’s end positions.
➢ Clean the unit.
➢ After 8000 switching cycles, the unit
must be checked by the manufac-
turer. Failure to do so invalidates
the flameproof approval.
Maintenance and part re-
placement
DANGER
During any maintenance or
replacement activity, pay spe-
cial attention to all regulations
relevant for Explosion Protec-
tion.
Only appropriately qualified
personnel may be entrusted
with the works. Only appropri-
ately classified components
may be installed.
Consult the manufacturer for
any repair on explosion protec-
tion relevant surfaces.
You can replace the following parts of
the unit if they are worn or damaged:
- limit switch plate as a sub-assembly
- timing belt
- brake
- motor
These components are available from
the manufacturer as spare parts. The
spare parts sets contain all parts nec-
essary for replacing that sub-assembly.
Please contact the manufacturer for
detailed information about spare part
sets.
To ensure that your enquiry is dealt
with as quickly as possible, please
provide the manufacturer with the fol-
lowing information:
Unit type
Actuator part number
Serial number
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