Genesis Advanced Technologies GRXXX & manual Function & Design, Introduction

Atlas & Yukon Second Stage

Function & Design

Introduction

The Atlas/Yukon second stage features a high performance, low volume design with a mechanically balanced valve. Here's how it works:

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▼Intermediate pressure air (140 psi) enters through the inlet coupling and orifice (1), where it meets the poppet and LP seat. The poppet spring (2) holds the poppet against the orifice with a pre-set tension that counteracts the intermediate pressure. The poppet is balanced between the two forces.

▼Airflow is actuated upon inhalation or purging, when the diaphragm is drawn down over the lever (3). This pulls the poppet away from the orifice.

▼Air and water are channeled to flow out through the exhaust valve (4), which is designed to minimize exhalation resistance while keeping the case internally dry in all positions.

▼(Atlas only - not shown) A dive/pre-dive switch can be set to minimize or boost peak venturi airflow, according to the diver's preference.

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