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OM2750.docx
SOFTENING EFFECT OF THE BLADDER
A
common
characteristic
of carbon dioxide is that being an unstable gas, it will gradually permeate through
the coated fabric of the bladder of all PFDS over an extended period. Thus a softening effect of the bladder can be observed
over time. For SMA2750, this can be overcome by topping up the pressure of the bladder through the oral tube inflation system.
Another characteristic of carbon dioxide gas is that under colder conditions, it will not expand greatly as in warmer
temperatures. Hence, when experiencing these situations, the bladder pressure needs to be top up using the oral inflation
system. Finally, in the event that the carbon dioxide inflation system fails to inflate the bladder, the oral system should be used
to fully inflate the PFD.
