You cannot breathe directly out of a scuba tank because of the high pressure. A regulator reduces pressure to safe a level that can be inhaled by the diver. A diving regulator has two parts: the First Stage reduces the tank pressure and connects it to the Second Stage which contains the mouthpiece for breathing
SUPREMELY SOLID PERFORMANCE Champion Reg System Sets the Gold Standard - in Titanium The MK25 EVO/S600 TITANIUM is a regulator for the Ages - literally. Ultra-light, bullet-proof and corrosion-resistant, this reg system promises a Century's worth of effortless air delivery and trouble-free service. SCUBAPRO's top regulator technology is clearly on display here. The MK25 EVO TITANIUM's first stage is machined from a solid block of titanium which does not corrode even in concentrated saltwater conditions, ensuring years of trouble-free use. It's also extremely lightweight (a full 11 ounces lighter than the brass version) and it produces a very low magnetic signature, which is why it's the regulator of choice among military divers. The MK25 EVO TITANIUM's air-balanced flow-through piston design delivers consistent and effortless airflow, regardless of depth, tank pressure, or breathing rate. With its ultra-freeze-resistant Extended Thermal Insulating System (XTIS) the MK25 EVO TITANIUM offers excellent thermal insulation by fully isolating the mechanical elements of the first stage from the cold, all without compromising breathing performance, making it an excellent choice for all water temperatures and conditions. It features a convenient swivel turret with five high-flow LP ports (high flow ports deliver about 15 percent more air than conventional LP ports). It also has an external intermediate pressure adjustment that allows technicians to maintain peak performance without the need for disassembly. The air balanced S600 TITANIUM second stage uses titanium on its exterior housing plus includes a machined titanium interior barrel for ultra-light high performance. The S600 TITANIUM delivers effortless inhalation and exhalation. It's easy to use too, with efficient user controls that include a powerful purge, an inhalation effort control knob and Venturi Initiated Vacuum Assist (VIVA) dive/pre-dive switch. For the diver who has everything but still wants more, the MK25 EVO/S600 TITANIUM is a lightweight, bullet-proof, extremely reliable breather. In terms of quality materials and advanced design, this reg system sets the gold standard - in tough titanium.
Machined titanium body is lightweight, highly resistant to corrosion and ultra durable.
Anti-freeze protection radically increases breathing reliability when diving in the most extreme water temperatures.
Two opposing high pressure ports allow the first stage to be positioned either up or down.
External intermediate pressure adjustment enables technicians to fine-tune performance quickly and easily.
Air-balanced valve smoothes out the inhalation effort at varying depths and supply pressures.
Titanium barrel is rugged, anti-corrosion and lightweight for long-term reliability.
Large diaphragm fits inside a more compact casing for maximum breathing sensitivity.
User controls include an easy-grip diver-adjustable inhalation effort knob and Venturi-Initiated Vacuum Assist (VIVA) lever.
Newly designed Compact Hi-Flow mouthpiece, exclusive to the S620 Ti, is mounted on an enlarged mouthpiece pipe to improve airflow as well as mouth comfort.
Super-flow hose features an oversized bore that allows more air to flow on each inhalation.