Retsch PM400 - Grinding Jar - Identification; Grinding Jar Cleaning; Drying the Grinding Jars

Operating the machine
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When grinding jars have been left to cool, a vacuum is created inside them which
can make them difficult to open. The grinding jars can be prised open between the
gripping flanges on the lid and the grinding jar, e.g. using a flat wooden stick (Hb).
5.17 Grinding jar – identification
All grinding jars can be identified by lettering which shows the article number and
material.
5.18 Grinding jar cleaning
Fig.
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: Removing the O-ring
The O-ring (Or) on the groove (Nu) on the underneath of the lid can be lifted out
easily to clean the grinding jar.
Grinding jars, including those with glued ceramic inserts, can be cleaned using
alcohol, benzine or normal household detergents
NOTICE
When cleaning, do not expose grinding jars with ceramic inserts to sudden
temperature differences.
Sudden temperature fluctuations can cause the ceramic inserts to crack.
5.18.1 Drying the grinding jars
After cleaning, the grinding jars can be dried in the drier cabinet at the
temperatures specified below.
Grinding jar material
Temperature
Special steel
Up to 200°C
Or
Nu
Hb