GES_FE51-52-53SP+FE121SP_1116.docx
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4. Operation
4.6 Changing the cylinder on cylinder pressure regulator FE51/52/53-SP2A
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 check that both pressure
gauges show 0 bar.
3
Relieve the pressure regulator by turning the handwheel (6) anti-clockwise.
4
Disassemble the pressure regulator from the gas cylinder valve and connect the new gas
cylinder.
5
Slowly open the gas cylinder valve (1) and set the desired outlet pressure for the cylinder
pressure regulator via its handwheel (6).
6
Carry out pressure purging of the cylinder pressure regulator with process gas. To do this, close
the gas cylinder valve (1), open the waste gas valve (8) to drain the process gas from the cylinder
pressure regulator and close the waste gas valve again immediately.
7
Repeat steps 7 to 10 (pressure purging with process gas) another 4 times.
8
Open the gas cylinder valve (1) one final time. If necessary, correct the set outlet pressure at the
pressure regulator again by turning the handwheel (6) and then slowly open the process gas
valve (7) to allow the process gas to flow slowly into the downstream pipe system. The cylinder
pressure regulator is now ready for operation.
9
Check the gas cylinder connection (2) and all other detachable connections for leakage.
4.7 Changing the cylinder on cylinder pressure regulator FE51/52/53-SP2 and FE121-SP
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 gas cylinder valve (1) and the process gas valve (7) and slowly open the purge gas
valve (9) to allow purge gas to flow into the pressure regulator.
2
Open the process gas valve (7) to drain the purge gas from the cylinder pressure regulator again.
Close the process gas valve.
3
Open the purge gas valve (9) again to allow purge gas to flow into the pressure regulator. Then
close the purge gas valve (9) again.
4
Open the process gas valve (7) to drain the purge gas from the cylinder pressure regulator again.
Close the process gas valve (7).
