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The diaphragm first stage features the
DFC system and a replaceable HP seat connector. This innovative first stage valve - the result of years of research and open
water trials all over the world - ensures superior resistance to wear, even with 300 bar (4.350 psi) systems. Compact body, in a
modern and smart style, it is made of hot-forged nickel-plated and chromed brass. It is fitted with a preferential intermediate
pressure port for connection to the primary second stage, plus 3 other LP ports and 2 HP ports. The latter are inclined at a 45°
angle to allow a more rational layout of hoses. Abyss second stage, with its V.A.D. system, is made of nickel and chrome-plated
brass. This material offers a number of benefits:absolute ruggedness and thinner walls, hence compact dimensions obtained
without using smaller-diameter diaphragms; this results in reduced water drag. Anti-freeze function, which is enhanced by the
"radiator action" of the metal. The second stage features the new "turbo flow" system for water flowing in and out, which affords
a further increase in performance. Furthermore, the compact and ergonomic exhaust tee ensures superior hydrodynamic
performance and reduced exhalation resistance.
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