Retsch Emax - Manual (Page 37)

Operating the machine
37
Fig. 26: Both grinding stations must be loaded
Fig. 27: Inserting the grinding jar
5.9 Wet grinding with highly flammable materials
Wet grinding using highly flammable materials is permissible in this device when
complying with specific precautionary measures.
When using highly flammable materials as grinding aid, such as hexane,
isopropanol, ethanol, petrol or similar, it is to be assumed that the inside of the
grinding jars should be classed as Zone 0
– constantly present explosive mix.
Therefore it is necessary to prevent potentially explosive vapours during the
grinding process - and in particular also from the heating which takes place - from
escaping from the clamped grinding jars and from entering areas in which the
requisite ignition energy is present.
We therefore urgently recommend that the operating company (employer) using
the device assesses the dangers that exist before using corresponding solvents,
taking local conditions into account, as part of a coherent explosion protection
G