WIKA GTU-10 - Handbuch (Seite 16)

16 WIKA operating instructions portable SF
6
gas transfer unit, model GTU-10
14051107.01 06/2013 GB/D
GB
6. Commissioning, operation
6.4 Consolidating SF
6
gas cylinders
When filling SF
6
gas compartments by using gas cylinders, there is a possibility of
considerable amounts of residual SF
6
gas remaining in the cylinders. For this, the
GTU-10 can be used to generate a completely filled gas cylinder from several part-filled
gas cylinders.
For this purpose, the part-filled gas cylinders are connected, one after the other and
gas-tight, to the inlet, and the gas cylinder to be filled is connected, gas-tight, to the
unreduced outlet (10).
The process of the gas transfer should be carried out as described in chapter 6.3.
In order to fill the gas cylinders to the maximum, they should be cooled
during filling in order to increase the filling quantity.
6.5 SF
6
gas filling with pressure reduction
CAUTION!
Ensure that the reduced connection is used. The unreduced outlet can
generate pressures that are significantly higher than required, and to
which the connected tank might possibly not be suited.
1) Before starting the filling, set the pressure reducer to the smallest pressure step. To
do this, turn the pressure reducer anti-clockwise all the way to the stop.
2) Connect the unreduced outlet with the gas compartment to be filled. After opening
the gas cylinder valve, the pre-pressure is available at the pressure reducer.
3) Set the desired pressure by turning the pressure reducer clockwise. The pressure
value is read from the pressure display (6).
4) By connecting the outlet valve with the gas compartment to be filled, the filling
process is started. The gas flows via the pressure reducer.
During the filling process, the pressure on the pressure display rises (6).
If the pressure equalisation is completed and the desired pressure has not yet been
reached, the compressor can be started.
Before switching on the GTU-10, the connection to the gas compartments should
be checked for leakage at the inlet and outlet. A leakage detector for SF
6
gas (e.g.
model GIR-10) should be used to test the connections.
5) After reaching the desired filling pressure, the unit should again be switched off and
all connections disconnected.
OI_14051107_GTU-10_GB_D.indd 16 13.06.2013 11:28:17