FRITSCH PULVERISETTE 7 premium line - Manual (Page 41)

5.9.2 Opening the grinding bowl after a grinding operation
1. Allow the bowl (1) to cool down.
2. Release the pressure by turning the press-on sleeve (7) to open it.
NOTICE!
After releasing the pressure via the press-on sleeve,
this and the valve plugs (6) must be cleaned thor-
oughly before further grinding processes. If this is not
done, the tightness may be reduced due to residual
sample material.
After restarting and reaching the set speed, we rec-
ommend securing the press-on sleeve (7) and handle
(5) again.
3. Turn the handle (5) to open it.
4. If the lid insert (9) is sticking on the flat seal (3), apply a screw-
driver to the actuating pin (8) to remove the lid insert (9) from the
flat seal (3).
5. Open the lid (2).
Using the device
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