Scubapro MK17EVO/S620 TI 

First and second stage

The new S620 Ti embraces the best features of SCUBAPRO's renowned S600 in an upgraded, state-of-the-art design. Delivering excellent performance; the S620 Ti's work of breathing has been reduced by 37% over the S600, providing effortless airflow under all dive conditions. The large purge button improves water circulation, and the new exhaust tee directs bubbles out of the field of view.  It's a stellar combination can be relied upon to deliver top-line performance in all dive conditions.

Technical Information

First Stage
Air balanced diaphragm delivers constant and effortless airflow unaffected by depth, tank pressure, or breathing rate.
Environmentally sealed system prevents water and pollutants from fouling the inner mechanism.
Dry ambient pressure chamber increases freezing resistance, ensuring consistent airflow in the coldest conditions.
Improved airflow on all LP ports
External intermediate pressure adjustment enables technicians to fine-tune performance quickly and easily.
Available in either 3364psi/232bar INT or 4350psi/300bar DIN configurations.
DIN version comes with a dual-compound wheel that features an ergo shape and soft grip on a rugged black nylon frame.
Airflow at 2900psi/200bar: 6900 l/min - 230 SCFM.
Intermediate pressure (psi/bar): 130-142/9.0-9.8.
 
Second Stage
Air-balanced valve smoothes out the inhalation effort at varying depths and supply pressures.
Rugged reinforced technopolymer case and front cover are able to withstand years of aggressive diving.
Titanium barrel is rugged, anti-corrosion and lightweight for long-term reliability.
Uses the S600's large diaphragm  inside a compact casing for maximum breathing sensitivity.
User controls include an easy-grip diver-adjustable inhalation effort knob and Venturi-Initiated Vacuum Assist (VIVA) lever.
Super-flow hose features an oversized bore that allows more air to flow on each inhalation.
Ultra-comfortable compact orthodontic mouthpiece is easy to grip yet doesn't inhibit airflow.
Airflow at 2900psi/200bar: 1850 l/min.