Key-indexed filling system
The key-indexed filling system consists of an anaesthetic-
agent-specific filling device on the Vapor and an
anaesthetic-agent-specific filling adaptor for connection
to an anaesthetic agent bottle with an indexed collar.
This system
– prevents filling with incorrect anaesthetic agent
– reduces the amount of anaesthetic vapour released
during filling
– prevents any overfilling of Vapor.
The key-indexed filling device has three holes:
for filling, venting and draining the Vapor and for over-
flow. The rotary fill/drain valve switches the function of
hole 2.
Filling:
The filling adaptor covers holes 1 and 2. After the bottle
has been swung into the upside down position, the filling
hose has to fill with anaesthetic agent first. After
switching to " " the anaesthetic agent flows into the
Vapor via hole 1. At the same time, the saturated vapour
displaced by the inflowing anaesthetic agent is routed out
of the Vapor via hole 2 and the inner tube into the bottle.
Overflow safety mechanism:
When the filling level reaches the bleed hole and covers
it, the supply ceases as gas can no longer be exchanged
between Vapor and bottle.
If the bottle and filling adaptor are incorrectly connected
to the bottle thread or the seal on the filling system is not
tight, the overfilling safety mechanism will no longer
function. An overflow 3 is provided so that the
anaesthetic agent may overflow to the outside if overfilling
continues.
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Description
Key-indexed filling system
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