GCE MediVital Bedienungsanleitung Seite 10

• 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
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• Wait until the residual gas is completely vented from all the cylinders
Close manifold vent valve
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D. VACUUMING OF CYLINDER
EN 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
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Ensure manifold vent and isolation valves are closed
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• Ensure the combination valve shut-off valve is fully open
Open manifold vacuum valve
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• 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 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 appropriate
quick coupler probe with inner hole of 1 mm to limit flow prevent combination valve damage.
6.1.3.5. Cylinder filling
• Ensure the shut-off valve on combination valve is fully open.
• Proceed with filling the gas cylinder.
Close shut-off valve after filling. Do not use excessive torque (max. closing torque is 5 Nm).
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• Vent the filling connections (including high pressure filling hose).
• Disconnect filling adaptor.
Before releasing the gas package for patient use, perform functional and leak-tight checks
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(refer to appendix Nr. 3 "Post filling checks").
• After completion of tests according to appendix Nr. 3, return the filling port protective cover.
Use only original GCE protective cover.
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.
6.1.4. REMOVAL OF COMBINATION VALVE FROM CYLINDER
• Observe oxygen cleanliness standards during removal.
Perform cylinder venting – follow Chapter 6.1.3.4, step A or B.
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• Remove filling port protective cover. Some types of covers are permanently connected to
the combination valve or guard. This is to prevent its loss and such connection should not
be broken.
• Ensure the combination valve shut-off valve is closed.
Ensure the inlet pressure indicator indicates an empty cylinder. If not, the combination valve is
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broken. Do not use it and send it for repair according to chapter 9.
• Connect filling adaptor.
Slowly open shut-off valve handwheel (anti-clockwise) until fully open - after approx. 1 turn
•
(see indication in picture chapter 5).
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