18
PROCEDURES DURING DIVING
It is recommended to breath steadily from the regulator and to avoid quick and shallow
breathing.
The regulator is designed in a way that the air bubbles flowing from it during the dive
do not worsen visibility. The only exception is when the diver who is under water
looks into the surface while exhaling at the same time.
After each time when the regulator is taken away from the diver’s mouth and then put
inside the mouth again, it is necessary to first exhale the air from it or to depress the
purge on the second stage regulator. Otherwise the diver can choke with water from
the second stage regulator. It is a standard procedure for each type of breathing
apparatus of this kind.
POST- DIVE PROCEDURES
Take the regulator out of the mouth.
The air remaining in the regulator system must be removed by depressing the second
stage purge.
The cylinder valve must be closed.
The pressure in the demand regulator must be made even with the ambient pressure.
We do it by depressing the second stage purge.
Remove the first stage regulator from the cylinder valve.
Rinse the entire demand regulator in clean, fresh water shutting the entrance of DIN
srew on the first stage. Check if all HP and LP ports are plugged or joined in a proper
way. These procedures are especially crucial when diving in salt or chlorinated water.
While cleaning the demand regulator DO NOT depress the purge on the second stage.
If the purge is depressed water will enter the system possibly causing damage to the
first and second stages.
While rinsing the breathing apparatus it is necessary to check if the purge is in a closed
position.
After cleaning the system we should attach it to the cylinder valve once again and
blow it with the air from inside the cylinder to remove any residual water.
In case of dives in dirty or salty water, rinsing the demand regulator may not be
enough to make it clean. In such cases it is advisable to rinse it in fresh, warm water
for at least 1 hour.
The regulator should be kept in a clean, dry area where it will not be exposed to rough
handling, extreme heat, sun rays or chemical substances.
ADVICE ON OPERATING
Whether the regulator will be reliable and working properly mostly depends on the
way that its owner cares about it.
The demand regulator should be handled with in a careful way and it should not be
exposed to unnecessary shaking or hitting. Chemical impurities or salt depositing
inside the regulator may result in its improper functioning. To avoid this it is