A high performance balanced diaphragm first stage regulator, the MK17 2 EVO has been engineered for harsh environments and for use in ice cold water or polluted environments. Resistance to cold has indeed been a key element in the engineering of the MK17 2 EVO.

The MK17 2 EVO is smaller and more compact than its predecessor, making it more reliable and lightweight.

• Dry ambient pressure chamber, providing better performance in cold water than any other diaphragm regulator. The diaphragm design prevents the entry of water into the first stage mechanism and enhances a trouble-free operation, even in the coldest conditions.
• Patented finned cap with ribs acts as a radiator to increase the surface area of heat transfer from the water to warm the internal parts.

The balanced technology provides consistent performance at all tank pressures, at any depth and optimizes the second stage performance, thus allowing for effortless breathing.

Therefore, diaphragm first stages have been the favoured choice of cold-water divers and those working in contaminated or muddy water.
SCUBAPRO diaphragm first stages feature balanced technology and are packed with patented features resulting in ultra fast flow to the second stage on demand and a fantastic overall performance.

• Dry ambient pressure chamber, providing  better performance in cold water than any other diaphragm regulator. The diaphragm design prevents the entry of water into  the first stage mechanism and enhances  a trouble-free operation, even in the coldest conditions.
• Patented finned cap with ribs increase surface area to maximise heat transfer from the water to warm the cold internal components.
• The balanced technology provides consistent performance at all cylinder pressures, at any depth and optimises the second stage performance, thus allowing for effortless breathing.
• Two opposite high pressure ports- The arrangement of high and low pressure hoses is crucial to diving comfort. Two opposite high pressure ports allow for an individual positioning of the first stage (pointing up or down). This allows the diver to position the gauges either on the right or left side and increases the freedom of movement for head and neck.
• Multiple low pressure ports- For ultimate freedom in the arrangement of low pressure hoses,  the MK17 features four stationary low pressure ports, two of them HF.  High flow ports deliver about 15% more air than conventional ports.
• DIN/INT first stage configurations- To ensure worldwide compatibility, all SCUBAPRO regulator systems are available in a 200bar INT version as well as 300bar DIN versions.
• Externally adjustable intermediate pressure- Allows authorised SCUBAPRO service technicians to quickly fine tune or make adjustments after maintenance without the need to disassemble the first stage.

The new S620 Ti embraces the best features of SCUBAPRO's renowned S600 in an upgraded, state-of-the-art design.

Smaller and lighter than the S600 but using the same-sized diaphragm, the S620 Ti delivers excellent performance; work of breathing has been reduced by 37% over the S600, providing effortless airflow under all dive conditions. The full titanium inlet tube is ultra-light, the large purge button improves water circulation, and the new exhaust tee increases performance while directing bubbles out of the field of view. In all water temperatures, in all dive conditions, this new reg system is a winner.

• 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.