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Medical Gas Supply System
4.8.8
Changing empty cylinders as per Section 4.6.
CAUTION! To ensure continuous supply of the
medical gas, NEVER have both line isolation valves (Item
12, Figure 1) closed at the same time. NEVER close both
side of the intermediate three way isolation valve (Item
14, Figure 1).
4.9
Typical Cylinder Handling
Checklist.
CAUTION! Only persons who have had specific
training in the safety of medical gases, manual handling
techniques and cylinder changing procedures should be
allowed to change cylinders on medical gas manifolds or
medical equipment.
•
Safety shoes should be worn at all times. When
moving larger cylinders, wear heavy protective
gloves (preferably textile or leather). Keep all items
clean and grease/oil free.
•
Do not smoke or use naked lights.
•
When handling smaller cylinders, the use of
protective gloves may be inconvenient. Extra care
should be taken to avoid injury and to make sure
that hands are free from oil or grease BEFORE the
cylinders are handled.
•
Do not knock cylinders against each other or other
solid objects.
•
Do not drop or drag the cylinders.
•
Do not use cylinders as rollers or wheel chocks.
•
Do not lift any cylinder by its valve or cap.
•
Use appropriate trolley for larger cylinders.
4109992459.00
4.10 Cylinder Operation.
CAUTION! Undue force should not be used to
cylinders.
CAUTION! ALL cylinder valves should be opened
gently. TAPPING the operating key GENTLY with a soft-
faced (copper) mallet is acceptable but undue force
should not be used. If it is obvious that injury or damage
could arise from trying to open a sticking valve, the
cylinder should be removed from service and returned
to the supplier as a faulty cylinder.
CAUTION! Opening cylinder valves SLOWLY will
prevent a sudden rise in pressure in the system. It is at
this time when there will be most stress on components
and when most explosions will occur due to adiabatic
compression of any oil or grease that may be present.
4.10.1 The cylinder valve should be FULLY opened
(slowly, anti-clockwise) using the appropriate cylinder key
or hand wheel where fitted and then turned clockwise a
quarter turn.
CAUTION! If there is any leakage of gas the
cylinder should be removed from service and returned
as faulty. DO NOT attempt to tighten gland nuts etc, as
this may cause damage to the valve.
4.10.2 To close the valve, turn the spindle or hand
wheel clockwise. Hand pressure only should be used to
close the valve.
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