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7.1.2. FITTING THE COMBINATION VALVE TO A GAS CYLINDER
Observe oxygen cleanliness standards during installation!
•
Check combination valve and gas cylinder for visible damage (especially inlet stem thread
of the combination valve and thread of gas cylinder). If it shows signs of external damage,
remove the valve or gas cylinder from service and suitably identify its status.
•
Check combination valve and gas cylinder for contamination. If needed, apply the cleaning
procedure according to chapter 9. For gas cylinder cleaning, refer to the cylinder manufacturer
cleaning procedure.
•
Check if the service or total life time of the combination valve and the gas cylinder has not
been exceeded. See Chapter 10. If service or total life time has been exceeded, remove GCE
product from service & suitably identify its status.
•
Ensure that the product inlet stem is compatible with the gas cylinder (gas/ thread type).
•
Check the presence & the integrity of seals / sealing materials (PTFE tape, O-ring) on inlet
stem.
•
Check that the gas cylinder pressure rating is higher than inlet pressure of the combination
valve.
•
Ensure that fitting equipment does not interfere with/or damage the guard and other parts of
the combination valve or cylinder. For more information see App Nr 4.
•
Assembly combination valve on gas cylinder To tighten the combination valve in cylinder use
only the square surfaces of the combination valve body. During fitting of combination valve to
the cylinder follow torque figures specified in EN ISO 13341.
The product is only designed for use with gas specified on its marking. Never try to fit to a gas
cylinder specified for different gas type.
If you suspect that inner parts of the combination valve have been contaminated, it must be
withdrawn from the service immediately.
Do not exceed the maximum torque allowed for the cylinder. Excessive torque may damage
the combination valve thread preventing its reuse. Certain types of cylinders may require
a torque lower than specified in EN ISO 13341. Check max. allowed torque value with your
cylinder supplier.
Multiple reassembly can damage inlet stem thread.
Take care not to damage external components of combination valve for instance E-Indicator
Display.
7.1.3. FILLING OPERATIONS
Observe oxygen cleanliness standards during filling.
7.1.3.1. Inspection before filling
•
Check if all labels and markings are legible and undamaged.
•
Remove protective cover from the filling port. Keep the caps in a safety place for reuse in
transport or storage.
•
Check combination valve and filling adaptor for damage. If it shows signs of external damages,
remove it from service and suitably identify its status.
•
Check combination valve and filling adaptor for contamination. If needed proceed with
cleaning procedure according to chapter 9.
•
Check that the service or the total life time of the GCE product and gas cylinder has not been
exceeded. See Chapter 10. If service or life time has been exceeded, remove the product from
service & suitably identify its status.
•
Check that the filling port is compatible with the filling adaptor (gas / type).
•
Check the preset filling pressure - The filling pressure (settled pressure at 15°C) shall not
exceed rated combination valve inlet pressure.
If you have a suspect that inner parts of the combination valve have been contaminated, it
must be withdrawn from the service immediately.
9/72
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