BUCHI Hydrolysis Unit B-411 - Manual (Page 16)

5 Putting into operation
16 B-411/E-416 Operation Manual, Version E
5 .4 Installing the rubber couplings
The rubber couplings can be carefully installed on the suction tube
and the sample aspiration tube after having moistened them with
water. During the installation, make sure that the collar of the glass
part abuts on the receptacle of the rubber part. The receptacles for
the glass sample tubes are provided with an antistick coating, so
that they can be easily installed and disassembled.
In order to avoid broken glass during the installation of the rubber
couplings, the glass part must be held as near as possible to the
receptacle collar.
Fig. 5.1: Suction tube with rubber coupling
5 .5 Filtration positioning
The distance between the sample aspiration tube and the digestion
vessel must be approx. 5 mm.
In order to guarantee optimal filtration, it is necessary to correctly
position the cap.
Fig. 5.2: Sample aspiration tube with digestion vessel