14
DIN to Yoke Converter
First Stage Environmental Protection
For diving in contaminated or cold
water conditions, some Apeks first
stages feature a unique “DRY”
environmental sealing system
which completely eliminates the
need for messy silicone oil or
grease filling. An external
diaphragm seals the ambient
chamber from the surrounding sea
water, while a specially designed
piston transfers ambient water
pressure to the internal diaphragm.
This helps to prevent ice from
forming inside the ambient
chamber, and also extends the life of the first stage internal
diaphragm. It is important to remember, however, that this
environmental protection will not completely prevent the second stage
from icing or freezing.
SSecond Stage Cold Water Protection
With the exception of the XTX20, AT20 & T20, Apeks second stages
incorporate a thermo-dynamic heat exchanger at the second stage
hose fitting. This patented (Patent No. U.S. Pat. 5,265,596) feature is
designed to draw in the surrounding water temperature, thereby
warming the valve mechanism and greatly reducing the possibility of
second stage freeze-up.
For important information about diving in cold water, refer to the
section titled, Diving in Cold Water, on page 22.
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