Manual rEvo III
28
your location (ask your instructor about this). After disinfecting, rinse the rebreather
again with fresh water and allow it to dry.
Unless your instructor advises differently, the recommended disinfectant material is a
1% solution of Virkon S. (DuPont).
Make a 1% solution, using cold water, and spray, or pour it into both counterlungs of
the rebreather, and both sides of the breathing hoses and in the mouthpiece. Leave it
for 10 minutes, and then rinse completely with fresh water. Make sure you don’t wet
the oxygen cells and the injection grid.
Unless you go diving again, allow the unit to dry out.
Note: to increase the life span of the oxygen cells it is very important to ventilate and
dry the rebreather when the unit is not in use for diving ! Experience shows that the
lifetime of oxygen cells also depends on the degree of humidity in which they are
stored: the dryer, the better! So when not using the rebreather, leave it open as
much as possible and store in a dry place. Pay attention, however, not to let insects
and other animal life get into your rebreather. (This can be avoided by covering the
rebreather with a thin scrim, which nevertheless allows some ventilation).
4.7. General maintenance
Greasing and controlling o-rings (interval):
The interval for greasing the O-rings depends on how intense the unit has been used,
and how clean the unit has been kept. If it becomes to difficult to mount the cover on
the unit, or to mount the breathing hoses, the O-rings must be cleaned, checked, and
when OK, greased and mounted again. The interval between checking and greasing
should nevertheless never be longer then one month.
Parts which have contact with oxygen:
All parts which do have contact with oxygen must always be kept in a pure and clean
condition. They may not get contaminated with dirt, grease or other substances.
Especially pay attention to the connection between the first stage connection and tank
valve. This connection is easily liable to becoming dirty.
Maximum service life of the unit and its parts:
The maximum service life of all rubber parts is 10 years. After this time, all rubber
parts of the unit (breathing hoses, mouthpiece, O-rings) must be replaced.
If parts of the rebreather are subjected to direct sunlight over a longer period of time,
the actual service life will decrease.
If wear is noticed during normal inspection, replace the affected part.
The maximum service life of the internal gas tubing for oxygen is 5 years, and for
other gas tubing 10 years.
The service life of the counter lungs is 10 years.
Replacement of internal gas tubing and counter lungs can only be done by the
manufacturer or an authorised rEvo service centre. (this can be done during the 5-
year inspection at the factory: see further)
