Owner's manual

Kirby Morgan 37 & 57

Correct installation of the oral/nasal valve is

extremely important to your safety.

7.8.3 Oral/Nasal Replacement

1) Snap the oral/nasal over the regulator mount nut

(45).

2) Reinstall the microphone.

3) Reinstall the nose block device.

4) Ensure that the oral/nasal valve has been installed

correctly.

The oral/nasal valve must be replaced

correctly to provide gas ﬂow in the proper

direction. The ﬂow through the valve must

be from the interior of the helmet into the

oral nasal mask. This will allow the diver

to breathe the gas from the defogger valve

freely, yet help to reduce carbon dioxide

inside the helmet.

If the valve is not replaced properly this

could make it difﬁcult to breathe the gas

supplied by the defogger and expose the

diver to an excess of carbon dioxide. This

could lead to exhaustion and blackout

resulting in serious injury or death.

WARNING