16
GES_FE51-52-53SP+FE121SP_1116.docx
4. Operation
5
Repeat steps 3 and 4 another 4 times.
6
Relieve the cylinder pressure regulator by turning the handwheel (6) anti-clockwise and check that both
pressure gauges show 0 bar.
7
Disassemble
the pressure regulator from the gas cylinder valve and connect the new gas cylinder.
8
Proceed as described in steps 2 to 6 of Section 4.4 to put the pressure regulator into operation again.
9
Check the gas cylinder connection (2) and all other detachable connections for leakage.
4.8 Changing the cylinder on cylinder pressure regulator FE51/52/53-SP3
Caution!
Each time you change the cylinder, check that the gasket is in perfect condition and replace it if
necessary.
Step
Activity
1
Close the process gas valve (7) of the cylinder pressure regulator and the gas cylinder valve (1) of the gas
cylinder which is to be replaced.
2
Relieve the cylinder pressure regulator via the waste gas valve (8) and close the valve again.
3
Open the purge gas valve (9) to allow purge gas to flow into the pressure regulator. Then close the purge
gas valve (9) again.
4
Relieve the cylinder pressure regulator via the waste gas valve (8) and close the valve again.
5
Repeat steps 3 and 4 another 4 times.
6
Relieve the cylinder pressure regulator by turning the handwheel (6) anti-clockwise and check that both
pressure gauges show 0 bar.
7
Disassemble
the pressure regulator from the gas cylinder valve and connect the new gas cylinder.
8
Slowly open the purge gas valve (9) so that purge gas flows into the cylinder pressure regulator, and set
the desired outlet pressure for the cylinder pressure regulator via its handwheel (6). Then close the purge
gas valve (9) again.
9
Open the waste gas valve (8) to drain the purge gas from the cylinder pressure regulator again. Then close
the waste gas valve (8) again.
10
Repeat steps 8 and 9 another 4 times.
11
Slowly open the gas cylinder valve (1) and if necessary, correct the desired outlet pressure for the cylinder
pressure regulator via its handwheel (6). Now close the gas cylinder valve (1) again.
12
Open the waste gas valve (8) to drain the process gas from the cylinder pressure regulator again. Then
close the waste gas valve (8) again.
13
Repeat steps 11 and 12 another 4 times.
14
Now slowly open the gas cylinder valve (1) again, then also slowly open the process gas valve, allowing the
process gas to flow into the downstream pipe system, and check that all detachable connections are gas-
tight.
