For automatic switching between two medical gas cylinders to
maximise use of gas contents in a safe and controlled way.
The COVA series Automatic Change Over Valve has a clear display
showing the pressure in the ambulance pipeline, the cylinder in
use, cylinder depleted and mute activated. The unit has three
switches, one on each cylinder symbol to manually select the
cylinder in use, and a third to activate the mute.
When in use, if the pressure from cylinder 1 falls below a pre-set
value then the COVA Automatic Change Over Valve changes to use
cylinder 2 and a red LED remains lit to indicate the cylinder has
been depleted. If the second cylinder is depleted before cylinder 1
has been replaced / refi lled, then the warning sounds to indicate
action is required and the valves to both cylinders are opened to
use any remaining oxygen available.