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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