Changing Cylinders • 5
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CHAPTER 5
Changing Cylinders
WARNING!
Dangers associated with handling argon gas cylinders
Argon cylinders may only be transported with a valve protection (cylinder cap).
Protect the argon cylinders from being warmed by heaters or open fires.
Argon cylinders may only be connected to the APC 300 with the pressure
reducer and hoses provided by ERBE.
No force of any kind should be exerted on cylinders, cylinder connections or
the pressure reducer. Protect the argon cylinder during transport, storage and
use from tipping over or falling down by means of chains, straps or safety
belts. Always use the safety belt on the mobile equipment trolley.
The input pressure at cylinder connections 1 and 2 of the APC 300 may not
exceed 4.5 bar (65.25 psi). If the unit is connected to a central argon supply,
the input pressure may not exceed 2.5 bar (36.25 psi).
Damaged cylinders may not be used. Mark them. Inform your gas supplier
immediately. Only use argon cylinders conforming to your national safety
standards.
The APC 300 may only be operated with argon. A cylinder containing a
dangerous gas could be connected to the cylinder connection of the unit.
Check each cylinder to ensure that it really does contain argon. Identification
of the cylinder must not be damaged or missing.
Argon is heavier than air. If it builds up in the air being breathed, it can
displace the oxygen so that there is a danger of suffocation. Symptoms of
oxygen deprivation are drowsiness, rising blood pressure and breathing
difficulties. In an atmosphere of pure argon, sudden and unexpected loss of
consciousness and suffocation occur.
A short hissing noise will be heard when the gas valves are opened due to the
argon flowing in the hoses. If this hissing continues for longer than 2 sec.
when a cylinder is opened, there is a leak and the argon cylinder must be
closed again immediately. The unit may not be used until the leak has been
rectified. Make sure that the hoses are faultlessly (tightly) connected to the
APC 300 and the gas cylinder. Close the safety valve of the argon cylinders
after use.
Valve protection
Warming
Pressure reducer
Do not use force
Input pressure
Cylinders
Only use argon
Uncontrolled flows of argon
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