Page 104 - SICCO catalog

SICCO Technical Information
Performance at a glance.
DRYING PERFORMANCE Glove Box
Test procedure:
Relative humidity
%
90
81
Glove Box Drying performance » room temperature 22 °C
A relative humidity of 100 % is simulated in a glove box. A SICCO Gas
Dosing Controller is connected during the lead in of nitrogen in order
to control the gas supply. A SICCO Gas-saving Valve is connected to the
outlet for aeration. In the Gas Dosing Controller, the attainable required
humidity is adjusted to 10 %, the flow rate to 8 Liters / minute and the 36 pressure reducer on the nitrogen bottle to 0,5 bar. The glove box and 27 transfer chamber remain closed tightly until the end of the test. The 18 curve shows the relative humidity versus time. 9
Results:
After approximately one hour, a relative humidity of 15 % is reached inside the glove box because of the supply of nitrogen. It is assumed that using a Gas Dosing Controller during the lead in of gas, the relative humidity decreases by 1% per minute at a flow rate of 8 Liters / minute.
OPENING AND CLOSING THE DOOR
Test procedure:
Relative humidity
%
45
40,5
Glove Box Opening and closing the door » room temperature 22 °C
72
63
54
45
0
14
28
Relative humidity of below 15 % after approx. 15 minutes.
Due to the constant gassing with nitrogen the relative humidity inside a
glove box with transfer chamber is 15 %. A SICCO Gas Dosing Controller 31,5 is connected during the lead in of nitrogen in order to control the gas 27 supply. A SICCO Gas-saving Valve is connected to the outlet for aeration. 22,5
In the Gas Dosing Controller, the attainable required humidity is adjusted to 10 %, the flow rate to 8 Liters / minute and the pressure reducer on the nitrogen bottle to 0,5 bar. The door of the working space is opened completely for 30 seconds, the transfer chamber is closed tightly during the test procedure. The curves show the relative humidity versus time.
Results:
The opened door causes an air exchange and thus the relative humidity in- side rapidly increases to approx. 50 %. By closing the door the gas dosing controller starts working again and the work space is purged again with nitrogen. After approx. 30 minutes the initial value is reached again.
36
18
13,5
9
4,5
0
6
12
42
18
56
24
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70
min
30
min
The initial value is attained after approx. 30 minutes.
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