MBRAUN LABmaster pro sp - MBRAUN-Hazard Classes

3 Safety
Process materials
MB-20-G/MB-200G-W_MB-LABmaster_MB-200 MOD_TP700
Operating Manual - V5.0 - 04/2018 - STD
Page
3 - 7
3.8.2 MBRAUN-Hazard classes
To classify the potential risks arising from work with different substances in inert gas sys-
tems, MBRAUN uses the following system of hazard classes:
¡ Hazard class MB-Hazard class0: covers product protection but not personal protec-
tion
¡ Hazard classes MB-Hazard classI to MB-Hazard classIV: cover personal protection,
in case of an error, the user has priority protection against substances and material
¡ Hazard class MB-Hazard classEX (inside): covers personal protection for the use of
gas (or vapor) mixtures that are potentially flammable, it covers substances that burn
in air or may ignite spontaneously
Optimal product protection and/or personal protection can only be achieved if the system
is upgraded with the appropriate safety features as outlined below.
Hazard class MB-HC-0
The inert gas box is operated in overpressure mode to ensure that no oxygen or moisture
enters the box.
System modifications and safety equipment are necessary if the handled materials are
highly valuable and should not come into contact with air in case of an error.
Contact MBRAUN.
Hazard class MB-HC-I
The MB-Hazard class I covers personal protection against hazards with low risk.
Material belonging to this class can be processed either in overpressure or negative pres-
sure mode. An audible alarm is recommended in case of a spontaneous pressure drop
(during overpressure operation) or pressure increase (leakage during negative opera-
tion).
Hazard class MB-HC-II
This class includes personal protection against hazards with increased risk.
To ensure the appropriate level of safety, the glovebox must be operated in negative
pressure mode. In case of a system leakage, users are protected against the substances
contained inside.
The following system modifications and safety features are required:
Safety measure step MBRAUN item no.
1 Emission of an audible alarm in case of an uninten-
ded spontaneous pressure increase (leak)
Only for systems in
design
2 Safe negative pressure operation of the glovebox in
a range from -3 mbar … -10 mbar (-300 …
-1000Pa). Antechamber doors require a Siemens
PLC-controlled lock mechanism.
1507300
3 Safety in case of a glove tear. If a glove tears, the
system must supply a continuous inward gas flow
from the ambient air through the broken glove at a
rate of 0.5 to 0.7 m/s.
1507301