17
6. Operation
6.1 Description of the device
Fig. 21
Components of compact device
•
It indicates a too low residual pressure of the gas cylinder.
– The green colour is visible if the cylinder contains enough
gas
– The red colour is visible if the cylinder is empty or if the
cylinder valve is closed.
6.2 Adjusting the dosing flow
6.2.1 Increasing the dosing flow
•
Turn the adjustment knob of the rate valve slowly to the right
Fig. 22
Increasing the dosing flow
6.2.2 Decreasing the dosing flow
•
Turn the adjustment knob of the rate valve slowly to the left.
Fig. 23
Decreasing the dosing flow
6.3 Reading the dosing flow
•
Read the dosing flow at the upeer edge of the ball
Fig. 24
Reading the dosing flow
6.4 Switching on
•
Close the rate valve.
•
Open the shut-off valve at the injection unit.
•
Open the motive water valves.
•
Switch on the motive water of the injector.
•
Open the valve of the gas cylinder.
•
Slowly open the rate valve until the ball in the measuring tube
shows the desired gas flow.
6.5 Switching off
6.5.1 Emergency Stop
In case of gas break-out
•
Immediately leave the room!
•
Start counter-measures according to local safety precautions.
In case of small leakages
•
Put on safety equipment!
•
Immediately close the cylinder valve.
•
Let the system run until all parts are evacuated.
•
Switch off the system as described in the following
6.5.2 Switching off while the system is running
•
Close the cylinder valve.
•
Let the system run until the measuring tube shows no more
gas flow.
•
Close the rate valve.
•
Switch off the motive water of the injector.
•
Close the motive water valves.
•
Close the shut-off valve at the injection unit.
TM
04
07
14
09
08
1
Inlet valve with pressure connection: For fixing the device
to the gas cylinder
2
Measuring tube: It displays the actual gas flow
3
Rate valve: For manual adjustment of the desired gas flow
4
Connection for the vacuum line to the injector
5
Connection for the overpressure line
6
Empty indication
Caution
The rate valve is not a perfectly closing shut-off
valve!
Note
The empty indication only works while the
system is in operation.
Caution
The rate valve is not a perfectly closing shut-off
valve!
T
M
04
07
15
09
08
TM
04 07
16 090
8
1
2
3
6
VGB-103
4
5
6
Note
The scale of the measuring tube is adjusted to a
gas temperature of 20°C. In case of extremely
different temperatures the dosing flow may differ
from the value being displayed.
TM
0
4
0
7
17
0
908
Warning
Immediately leave the room in case of gas break-
out and put on safety equipment!
Then start counter-measures!
Warning
Repairs of coponents of the system only by
authorized personnel!
g/h
lbs/day