Buchi B-585, Руководство по эксплуатации

Страница: 22 / 36

20
Glass Oven B-585
5.4.3 Cooling
For substances with a low boiling point, air-cooling is not
always sufficient to make the vapour condense in the balls
outside of the oven area. In this case, it is recom men ded to
use a cooling appa ratus. You can fill the dish with tap water,
ice-water, an ice-salt mixture, dry ice or a dry ice-alcohol
mixture.
The cooling dish is designed so that either a small glass ball
can be cooled by turning the dish sideways, or two small
or one large glass ball can be cooled by turning the dish
length-wise.
The cooling dish is made of polyethylene. This material is
not re sistant to chlorinated solvents. For this reason, cooling
mixtu res containing these types of solvents may not be used.
The dish schould be prevented from coming into contact
with the metal flange.
Dry ice and dry ice-alcohol mixtures will cause injury and
burns if they come in contact with skin.
If dry ice-solvent mixtures are used, then there must always
be dry ice in the solvent as long as the temperature in the
glass oven is higher than 50°C.
5.4.4 Assembly/disassembly of the vapour duct
The vapour duct is inserted into the drive unit as follows:
First the union nut
a
and the clamping cone
b
are moun-
ted. The vapour duct
c
is then pushed from the left into the
drive unit
d
until it passes the vacuum seal on the right side
of the housing. Use the stop
e
to tighten the union nut, the
vapou r duct has now been assembled.
The contact surface of the vacuum seal together with the
vapour duct are then
lightly greased and inserted into
the vacuum mount attached to the right side of the housing.
Repeat the greasing of the vapour duct as required.
Fig. 18: Cooling device
a
b
c
e
d
Fig. 19 : Assembly of the vapour duct
5 Operation