Compact machined first stage based on the expedition tested
Apeks DS4 platform.
• Break through, innovative over-moulded first-stage endcap
and environmental diaphragm helps prevent ice build-up that
can cause first stage free flow in extreme circumstances. Also
protects the first stage from impact damage.
• Large surface area heat exchanger diaphragm clamp helps
increase the gas temperature inside the first stage, resulting in
improved cold water performance.
• Unique over-balanced diaphragm design – as the diver
descends, the over-balancing feature allows the medium
pressure gas in the hose to increase at a faster rate than
ambient. This results in superior performance at depth.

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