FRITSCH PULVERISETTE 7 premium line - Manual (Page 28)

NOTICE!
The planetary drive is provided by the main disc via a
toothed belt drive. Constant high loads stress the toothed
belt severely, and may even damage it. High loads may be:
heavy loads, high speeds, high temperatures, long oper-
ating times or combinations of these.
NOTICE!
The grinding duration in the reversing mode must not
exceed 5 minutes. A longer grinding duration in the
reversing mode may damage the PULVERISETTE 7 premium
line.
NOTICE!
If the permissible maximum temperature in the bowl is
exceeded during grinding, then the device must not be
switched off with the lid closed. That could lead to heat
accumulation in the machine, which could cause damage to
the device.
Provide sufficient cooling by letting the mill continue to run
at a speed of 100 rpm for approx. 20 - 30 min. or by shut-
ting off the mill with the lid open.
5.1.1 General information
The grinding bowls have been tested and approved for a static internal
pressure of up to 20 bar.
If the pressure increases gradually, safety elements in the lid prevent the
build-up of an unacceptable overpressure.
Fast and dynamic pressure surges (e.g. an explosion or very fast chemical
reactions, etc.) up to 30 bar will not cause any damage. A higher pres-
sure will result in irreparable damage to the grinding bowl and possibly
also damage the machine.
In such a case, the grinding bowls and the machine are not covered by
the Fritsch guarantee.
To clean the grinding bowl and its components, follow the operating
instructions precisely (Ä Chapter 8 ‘Cleaning’ on page 101).
Using the device
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