Wika GTU-10 Manual do Utilizador descarregar pdf (Página 16)

WIKA operating instructions portable SF

gas transfer unit, model GTU-10

14051107.01 06/2013 GB/D

6. Commissioning, operation

6.4 Consolidating SF

gas cylinders

When lling SF

gas compartments by using gas cylinders, there is a possibility of

considerable amounts of residual SF

gas remaining in the cylinders. For this, the

GTU-10 can be used to generate a completely lled gas cylinder from several part-lled

gas cylinders.

For this purpose, the part-lled gas cylinders are connected, one after the other and

gas-tight, to the inlet, and the gas cylinder to be lled 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 ll the gas cylinders to the maximum, they should be cooled

during lling in order to increase the lling quantity.

6.5 SF

gas lling with pressure reduction

CAUTION!

Ensure that the reduced connection is used. The unreduced outlet can

generate pressures that are signicantly higher than required, and to

which the connected tank might possibly not be suited.

1) Before starting the lling, 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 lled. 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 lled, the lling

process is started. The gas ows via the pressure reducer.

During the lling 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

gas (e.g.

model GIR-10) should be used to test the connections.

5) After reaching the desired lling pressure, the unit should again be switched o and

all connections disconnected.

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Wika GTU-10 Manual do Utilizador Página 16