…
_
‘
“"
;
FIGURE 4. View of inside of drying plant showing
_
vacuum
pump,
13205 t1‘ap, vacuum valve and
.
_
>
refrigerator power pack. Note the position of the
:
_
P205 trap between the vacuum valve and the
«
_
_
-
_
pump.
_
,
__
%
:“:‘î
_
'
'
à
'
'
; ,
'
‘j
__f
'
x
‘
.
'
'
'
,.
?
»
.
'
,
.
FIGURE 3. General view of freeze—dryîng apparatus
'Ï
,
showing desiccator chamber and power pack for
'“
jÊ
_;y,_
«
the ‘Frigistor’ refrigerator.
.
'
-‘
?
"
__
_
’n‘“
,
.
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]
â—:./.=
*
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,,
'/
,
..
'
_
‘—
4.
'
.
w"
_
'
_
_
‘
"—
FIGURE 5. Detail View of the de51ccator
'
—
base plate showing the two stage ‘ Frigistor’
%
@“
refrigerator with the aluminium block for
'
-
'
ampoules on the second stage.