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•
Turn off at the shut-off valve by turning the combination control knob "shut-off valve & flow
selector" in a clockwise direction to OFF position. Do not use excessive force (Maximum
recommended closing torque is 3 Nm).
•
Disconnect quick coupler probe.
Note: Venting of the cylinder by following steps A or B can be performed prior to fitting the
filling adaptor. Venting of the cylinder by following steps 'C' and 'D' requires the filling adapter
to be fitted to the combination valve first according to chapter 7.1.3.3.
C. Venting of the residual gas from cylinder through a filling port
•
Ensure all lines of the filling manifold are correctly connected to the combination valve filling
ports
•
Ensure the manifold vent valve and isolation valve is closed
•
Open slowly the combination shut-off valve by turning slowly the combination control knob
"shut-off valve & flow selector" in anticlockwise direction to ON position.
•
After pressure between cylinders and filling manifold is settled open manifold vent valve
•
Wait until the residual gas is completely vented from all the cylinders
•
Close manifold vent valve
D. Vacuuming of cylinder
If it is necessary to vacuum the cylinder to reach the required gas purity, this is possible through
the combination valve filling port after venting of the cylinder
•
Connect combination valves to the filling manifold and vent cylinders according to 'C' above
•
Ensure manifold vent and isolation valves are closed
•
Ensure the combination valve shut-off valve is fully open
•
Open manifold vacuum valve
•
When required vacuum level has been reached close manifold vacuum valve
Gas cylinder venting must be done in well vented area to prevent saturation of ambient at-
mosphere with oxygen that would increase risk of ignition.
Sudden opening could result in a danger of fire or explosion arising from oxygen pressure
shocks. Insufficient opening of the shut-off valve could reduce actual flow delivered.
Make sure that during venting of the residual gas the surface temperature of combination
valve and cylinder does not exceed limited operational conditions. If this happens the combi-
nation valve must be allowed time to recover temperature before filling is started. The level of
temperature change is dependant on many factors (residual pressure, ambient temperature,
size and material of the cylinder, type of gas, speed and duration of venting)
Venting through the combination valve quick-coupler must only be performed with appro-
priate quick coupler probe with inner hole of 1 mm to limit flow prevent combination valve
damage.
7.1.3.5. Cylinder filling
•
During filling, the shut-off valve must be turned on – ensure that shut-off valve is turned on –
combination control knob "shut-off valve & flow selector" in ON position,
•
After filling ensure that shut-off valve is turned off – combination control knob "shut-off valve
& flow selector" in OFF position. When turning off at the shut-off valve do not use excessive
force (Maximum recommended closing torque is 3 Nm).
•
The filling line (including the filling high-pressure hose) must be vented to disconnect the
filling adaptor).
•
Before to release the medical gas primary package for patient use, perform functional and
leak-tight checks Refer to appendix nr 3 "Post filling checks".
Pressure in the filling connections during disconnection of the filling adaptor or open shut-off
valve of combination valve may cause personnel injury or damage to the combination valve
or filling adaptor.
Make sure that during filling the surface temperature of combination valve and cylinder does
not exceed the allowed maximal limits. Temperature increase is affected by size and material
of cylinder, type of gas, duration of filling and filling pressure.
11/72
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