The new 500SE utilises a servo controlled valve to provide precision airflow and unparalleled performance for both air and trimix divers in a side exhaust configuration. An overbalanced diaphragm first stage also provides ideal hose routing for both backmount and sidemount users and optimum performance at any depth.
The 500SE's pneumatically balanced servo-valve is a two-stage valve. Just a small sip through the mouthpiece opens the servo mechanism or control valve lever. Air flow from the servo valve creates a vacuum which opens the main valve diaphragm allowing air to flow through the regulator to the mouthpiece. Instead of one small port to provide air flow from the first stage, the 500SE features porting around the entire main valve to provide superior breathing performance.
500SE Second Stage