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
▼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
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