GE Datex-Ohmeda Aisys Carestation Reference Manual page 87

Pop-off valve
7
7
5
Flow to bellows
6 Pop-off flow
7
To scavenging
Figure 2-42 • Flow through the pop-off valve
M1046983 04/08
The pop-off valve limits the pressure inside the bellows to 2.5 cm H
gas pressure. This normally occurs when the bellows reaches the top of the housing at
the end of exhalation (5).
Excess gas (6) vents to the scavenging system (7) through the pop-off valve and the
exhalation valve.
5
5
6
2 Theory of Operation
O above the drive
2
2-55