GCE druva 34 Series Instructions For Use Manual page 25

purging
gas
To ensure a continuous supply of gas the right-hand cylinder should be replaced promptly.
To do this the change-over switch lever is switched to the left-hand side. The back pressure
increases slightly.
For cylinder replacement the cylinder valve and service gas valve on the right-hand side are
closed. The residual pressure is released by opening (and closing) the purging gas valve. The
new cylinder is connected to the unit.
purging
gas
The gas supply is still being provided by the left-hand cylinder.
Once it is empty, automatic change-over to the righthand cylinder ocurs. Back pressure
decreases slightly as a result.
The entire procedure can be repeated from the start once the change-over switch lever has
been switched back to the right-hand side and the left-hand cylinder has been replaced.
The described change in back pressure during control lever switching lever and automatic
change-over is in accordance with principle and is required for automatic change-over.
service gas
outlet
Gas fl ow from left-hand cylinder / Right cylinder replacement
service gas
outlet
Left cylinder is empty / Gas fl ow from right hand cylinder
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purging
gas
purging
gas
EN