GCE MediVital Manuel D'utilisation page 8

vented according to 6.1.3.2 before fitting the filling adaptor.
Pneumatic or electric wrench can be used with some types of filling adaptors. However
these must be equipped with a torque limiting device to ensure tightening torque will
not exceed 3,5 Nm.
6.1.3.4 Venting of residual gas from cylinder
EN
A. Cylinder venting through flow control head:
•
Slowly open shut-off valve handwheel (anticlockwise) until fully open - after approx. 1 turn
(see indication in picture chapter 5).
•
Set flow control head to maximal position - ensure that flow control head engages correctly.
•
Wait until the cylinder has vented completely.
•
Close the shut-off valve (clockwise). Do not use excessive torque (max. closing torque is
5 Nm).
•
Set flow control head in "0" position.
B. Cylinder venting through gas pressure outlet:
•
Slowly open shut-off valve handwheel (anti-clockwise) until fully open - after approx. 1 turn
(see indication in picture chapter 5).
•
Insert quick-coupler probe in the combination valve quick coupler (refer to appendix nr. 2 to
get information about connecting / disconnecting procedure of quick coupler type on your
product).
•
Wait until the cylinder has vented completely.
•
Close the shut-off valve (clockwise). Do not use excessive torque (max. closing torque is
5 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 6.1.3.3.
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
•
Slowly open the combination valve shut-off valve handwheel (anti-clockwise) until fully open
- after approx. 1 turn (see indicator in picture chapter 5)
•
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
atmosphere 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 combination valve must be allowed time to recover temperature before filling
is started. The level of temperature change is dependant on many factors (residual
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