FRITSCH PULVERISETTE 0 - Manual (Page 32)

7.2.3.5 Tips for wet sieving of difficult sieving stock
n For wet sieving of difficult sieving stock, reduce the feed quantity
and choose sieves with closely staggered mesh widths.
n Switch on Interval mode; sieving time: 3...5s (only possible with
ANALYSETTE 3 PRO)
n After the top sieve has sieved completely (is free of fine particles)
remove the top sieve after taking off the clamping lid and clamp the
clamping lid on the next sieve. Now the spray jets work directly on
the following fraction. Proceeding in this way makes it possible to
sieve each individual sieve of the sieve set directly using spray jets.
The spray jets are directed so that the sieving stock is rinsed from
the edge of the sieve towards the middle. In the process, the
clamping lid (plexiglas lid) is also sprayed and kept free of material.
n When wet sieving difficult sieving stock, insert an intermediate sieve
ring (order no.: 31.0240.00) over a lower sieve to avoid a backup on
it. After this ring is connected to the hose system, additional liquid is
sprayed in through three nozzles and thus counteracts a possible
backup. These nozzles are arranged so that the lower as well as the
upper sieve surfaces are sprayed. This arrangement also circulates
the sieving stock. If necessary, a further intermediate sieve ring can
also be mounted above a sieve that is prone to backup.
7.2.4 Cleaning the test sieves (mesh wire sieves)
We recommend using the "LABORETTE 17" ultrasonic cleaner to clean
the test sieves. More powerful ultrasonic cleaners can destroy the mesh
wire. Place the sieves vertically or with the sieve mesh wire facing
upwards into the cleaning fluid.
NOTICE!
Use of a brush can destroy the fine mesh wire of the sieve!
Only use mechanical aids for coarse sieves.
With small mesh widths, there is the danger that the sieve
will no longer have the correct mesh width if the position of
the mesh wire is shifted.
As far as possible, clean the sieves after every use. The sieves can be
dried in a drying cabinet at a maximum of 95 °C (rinsing with alcohol
reduces the drying time).
NOTICE!
The sieve and grinding covers of accessories with plexiglas
insert may only be heated to max. 60 °C.
Accessories
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