8 Glovebox or enclosure operation
Inertisation
MB-20-G/MB-200G-W_MB-LABmaster_MB-200 MOD_TP700
Operating Manual - V5.0 - 04/2018 - STD
Page
8 - 3
8.2.4 Mechanical hazards
WARNING
Moving parts in the glovebox
Risk of squeezing, jam, injury of body parts
► Monitor glove usage with light barriers which cause an automatic stop of mechanical
movements.
► Implement an emergency stop function that allows the operator to stop all mechanical
movements.
► Use pneumatic systems with reduced speed.
In cases, using rapidly moving parts in the glovebox (customer equipment such as robots,
dispenser, etc.) make sure a safe operation.
8.2.5 Reactor damage by ambient air
After installation or maintenance work, the glovebox will be filled with ambient air. Circula-
tion with an oxygen concentration > 100ppm can damage the reactor medium as well as
the O
2
and H
2
O analysers.
► Purge the glovebox with inert gas until the O
2
concentration drops below
100ppm(V).
► Switch the circulation on.
► Process materials that are sensitive to moisture and oxygen must be hermetically
sealed and stored prior to start any maintenance work.
8.3 Inertisation
Purpose of an inertisation is to displace oxygen, hydrogen or other unwanted gases in the
gas atmosphere with working gas. There are two methods to achieve inertisation of a
glovebox:
¡ Manual inertisation (refer to chapter Inertisation of the glovebox [}4 - 31]). This
method is recommended:
¡ after initial installation of a glovebox as a step of the commissioning sequence
¡ after the glovebox was out of service over an extended period (> 2weeks) but not
opened
¡ after the glovebox was open and filled with ambient (for example because of
maintenance works)
¡ PLC-controlled glovebox purge (refer to chapter Glovebox purge [}8 - 13]). This
method is recommended:
¡ after the glovebox was out of service only over a short period (< 2weeks)
¡ during operation, if processes running in the glovebox enrich the glovebox atmo-
sphere with unwanted gases
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