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The Aqua Lung regulator line is dividedinto several different models based upon the design of first stage.•
Heat Exchangers (Fig. 3) Comfo-Bite® Mouthpiece with Lip Shield (Fig. 4) The Legend series – The Legendseries is our high end range whichboosts the most features and benefits.The Legend 1st stage is aDiaphragm design which utilizes aproprietary overbalanced first stage to achieve unprecedented performance for the most demanding divers. The Legend1st stage is available with either theadjustable or nonadjustable second stage. The Legend series has ACDsystem (Auto Closure Device).•
on the second stage help the regulator to resist freezing while diving in colder waters.The heat exchanger conducts the temperature of the surrounding water to the valve inside the regulator, virtually eliminating second stage freezing. The patented Comfo-Bite mouthpiece with the addition of a lip shield helps protect the diver’s lips from extreme cold.

Cold Water Features Nitrox compatibility (Enriched Air Nitrox EAN) TECHNICAL CORNER

Environmental Dry Seal (Fig. 2) that keeps water away from the exposed main spring on the first stage thereby reducing the likelihood of freezing on cold water dives.This feature, which comes standard on cold water models, may be added to other models for divers in harsh environments that have the need to keep silt or pollution out of the main spring chamber. Found on “Supreme” Models (Fig. 1) In EEC countries, the Nitrox/O2 diving is ruled by the EN 144-3 standard – Respiratory protective devices – Gas cylinder valve - Part 3 : Outlet Nitrox connections and EN 13949 standard – Respiratory equipment – Open-circuit self contained diving apparatus for use with compressed nitrox and oxygen – Requirements, testing, marking.The maximum depth depends on the percentage of oxygen used in the mixture.• Aqua Lung offers a separate line of regulators whichare designed and manufactured specifically for dedicated use with enriched air above 40% and up to 100% of oxygen.This range meets the requirements of the EN 144-3 and the EN 13949 and has successfully passed the adiabatic compression tests. It has consequently been awarded the CE type certificate.• These regulators with specific connections should beused only with suitable complementary equipment (cylinder valves, cylinders, pressure gauges, etc) designed and prepared for use with oxygen enriched gas or oxygen.• Nitrox/O2 regulator is built to a high standard ofcleanliness using EAN/oxygen compatible components and lubricants.• The breathing air used for the mixture should beoxygen-compatible or “hyperfiltered” whereas the condensed hydrocarbons do not exceed 0.1 mg/m3. Cold water diving requires special training and also requires specialized equipment designed to resist “Freeze-Up”. Most Aqua Lung regulators are available in a “Supreme” version that is adjusted and designed to perform specifically under cold water conditions. These adaptations include : The Titan series – The Titan 1st stageis the most popular and is the workhorseof the fleet. Coupled with the LX second stage the Titan LX performance rivals ourhighest end regulators while maintaininga very attractive price.The Titan is an in- line balanced diaphragm mechanism thatis very compact and easy to use.• Calypso series – The Calypso firststage is our new simple piston regulator,it is built up from the famous Calypso series.The new components are compatible with the previous Calypsoseries.The new internal shapes allowedus some very high breathing perfor- mances. It is possible to use it in coldwater diving (CE approval). • Second Stages – Aqua Lung offersseveral models of second stages. Eachsecond stage is carefully matched in performance and features to a firststage.To assist in second stage selectionplease review the different Second Stage design criteria on the previous page.
Work of Breathing All Aqua Lung regulators are objectively tested and their gas delivery performance is evaluated using an ANSTI breathing boat simulator machine. This simulator quantifies inhalation and exhalation effort while subjecting the regulator to variations in depth, supply pressure and watertemperatures.The results of thesetests, which study exhalation and inhalation effort, are computer analyzed to produce an overall “workof breathing”(WOB) rating.The WOBresults are typically plotted as “WOB Curves” as seen below.All Aqua Lung regulators meet orexceed the rigorous standards required of regulators sold interna- tionally and particularly in European countries. The rigorous Europeanstandard (“CE”) requires that the WOB does not exceed 3 joules/liter at 165feet. All Aqua Lung regulators have received the CE approvalrating.Throughout these pages, youwill see examples of breathing curves exhibiting the overall WOB for the various models. When you purchase an Aqua Lung regulator, you are buying it with confidence because of the comprehensive test program to which these regulator designs aresubjected. Fig 1Fig 2 Fig 3Fig 4 Breathing curve
Exhale Inhale Overall Work Of Breathing:0.79 J/litreMaximum Limit:3.0 J/litre Depth:165 ft (50 m) Ventilation Rate:62.5 lpm Inlet Pressure: 725 psi (50 bar) 45