Retsch AS 200 - Manual (Page 20)

31.07.2012
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Retsch GmbH
20
Retsch analytical sieves are available in versions
complying with all the usual national and international
standards:
* Standards available:
DIN, ISO, ASTM, BS
* Available diameters:
100 mm / 150 mm / 200 mm / 203 mm (8")
* Available woven screens materials:
Woven wire screens made of stainless steel
Perforated plates made of stainless steel
Specifics will be found in the detailed brochure describing
the analytical sieves.
The stack required for sieve analysis is composed of
analytical sieves which are arranged one above the other,
with progressively larger holes toward the top, together
with the base pan.
Quantity of product to be sieved
To ensure fast separation and exact results, the quantity
of the product being examined should be matched to the
sieve diameter and the nominal size of the openings.
The specific standards for sieve analysis (e.g. DIN
22019, Part 1) provide guideline values in which the
following
maximum charge quantities are
recommended:
Nominal widths of the
screen openings
Material quantity in dm3
at 200 mm diameter
8 0.500
3.15 0.300
1 0.140
0.5 0.100
0.2 0.060
0.063 0.035
0.020 0.020