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1. Copyright Rebreather Lab 2006 1

2. Copyright Rebreather Lab 2006 2

3. Copyright Rebreather Lab 2006 3
Pelagian DCCCRPelagian DCCCR
Working principle conceived 1997Working principle conceived 1997
Prototype test dived during 2005 - 2006Prototype test dived during 2005 - 2006

4. Copyright Rebreather Lab 2006 4
Pelagian DCCCRPelagian DCCCR
Launched 2006 - First CCR manufactured in AsiaLaunched 2006 - First CCR manufactured in Asia

5. Copyright Rebreather Lab 2006 5
Let’s go foraLet’s go fora
one breath tour!one breath tour!
A)A) The diver breathes out into the DSVThe diver breathes out into the DSV
where the check valves direct thewhere the check valves direct the
flow to the divers right side breathingflow to the divers right side breathing
hose and around the water trap in thehose and around the water trap in the
T-piece into theT-piece into the exhale counter lung.exhale counter lung.
B)B) From there the gas goes back to theFrom there the gas goes back to the
T-piece and into the CO2 ScrubberT-piece and into the CO2 Scrubber
where the CO2 is absorbed. Freshwhere the CO2 is absorbed. Fresh
O2 is continuously added via theO2 is continuously added via the
needle valve and mixes with theneedle valve and mixes with the
exhaled breath in the Scrubberexhaled breath in the Scrubber..

6. Copyright Rebreather Lab 2006 6
C)C) In the scrubber head the oxygenIn the scrubber head the oxygen
pressure (POpressure (PO22) is measured by two) is measured by two
independent, specially designed,independent, specially designed,
sensors which transmit theirsensors which transmit their
readings to a double display unit.readings to a double display unit.
The diver manually adjusts the PO2The diver manually adjusts the PO2
if needed.if needed.
Let’s go foraLet’s go fora
one breath tour!one breath tour!
D)D) Afterwards the OAfterwards the O22 enriched gasenriched gas
flows into the inhale counterlung onflows into the inhale counterlung on
the left-hand side, ready for the nextthe left-hand side, ready for the next
inhalation.inhalation.

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Advantages:Advantages:
 Almost no bubbles and almost silentAlmost no bubbles and almost silent
 Economical gas consumptionEconomical gas consumption
 Warmgas resulting in reduced loss ofWarmgas resulting in reduced loss of
core temperaturecore temperature
 Prevents dehydrationPrevents dehydration
 Betterintegration in the UWworldBetterintegration in the UWworld
 Vastly reduced costs formixed gasVastly reduced costs formixed gas
dives e.g. TRIMIXdives e.g. TRIMIX

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Pelagian - Unique features:Pelagian - Unique features:
 Longest scrubberduration on the marketLongest scrubberduration on the market
 Instant sensorvalidation and dryingInstant sensorvalidation and drying
 Leaksafe electronicsLeaksafe electronics
 No theoretical depth limitationNo theoretical depth limitation
 Runs off one inexpensive 9V batteryRuns off one inexpensive 9V battery
 Side mounted counterlungsSide mounted counterlungs
 Most spares available in any dive storeMost spares available in any dive store
 Weight is only 11 kg with out cylinders!Weight is only 11 kg with out cylinders!
 Fits in hand carry when flyingFits in hand carry when flying

9. Copyright Rebreather Lab 2006 9
How deep can I dive with theHow deep can I dive with the
Pelagian DCCCR?Pelagian DCCCR?
Depends on the diluent gas used!Depends on the diluent gas used!
 With air:With air: 50 - 60 m50 - 60 m
 Trimix:Trimix: depends on the mixdepends on the mix
And the quantity!And the quantity!
 Bail-Out:Bail-Out: the mix and quantity of availablethe mix and quantity of available
gas is critical in planning max. depthgas is critical in planning max. depth

10. Copyright Rebreather Lab 2006 10
Dive time is determined by:Dive time is determined by:
 COCO22 filtercapacityfiltercapacity
 CylindercapacityCylindercapacity
 Battery capacityBattery capacity
 Personal metabolic ratePersonal metabolic rate
 NDL /Deco obligationNDL /Deco obligation
 POPO22 exposureexposure
How long can I dive with theHow long can I dive with the
Pelagian DCCCR?Pelagian DCCCR?

11. Copyright Rebreather Lab 2006 11
 OO22-consumption is not dependant on depth-consumption is not dependant on depth
 Longerdives possibleLongerdives possible
Why CCRinstead of OC?Why CCRinstead of OC?

12. Copyright Rebreather Lab 2006 12
Why CCRinstead of SCR?Why CCRinstead of SCR?
 Nitrox diving without premixedNitrox diving without premixed
gases and pre-determined MODgases and pre-determined MOD
 Dynamic gas mixing allows foraDynamic gas mixing allows fora
best mix at every depth during thebest mix at every depth during the
divedive
 Logistically easier(only compressedLogistically easier(only compressed
airand Oairand O22 are needed)are needed)

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Design elements of theDesign elements of the
Pelagian DCCCRPelagian DCCCR
 DSVDSV
 CounterlungsCounterlungs
 Filterunit (”COFilterunit (”CO22 Scrubber”)Scrubber”)
 Oxygen cellsOxygen cells
 PO2 displaysPO2 displays
 Oxygen feed systemOxygen feed system
 ADV with cell validationADV with cell validation

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DSV (mouth piece)DSV (mouth piece)
Consists of:Consists of:
Silicone mouthpieceSilicone mouthpiece
CheckvalvesCheckvalves
Rotating barrel foropen/closeRotating barrel foropen/close
Interfaces to optional OCInterfaces to optional OC
22ndnd
stage and optional Bail Outstage and optional Bail Out
Rebreather(early 2008)Rebreather(early 2008)
Both options allow bypassing the rebreatherwithBoth options allow bypassing the rebreatherwith
out removing the mouth pieceout removing the mouth piece

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CounterlungsCounterlungs
Pelagian DCCCRPelagian DCCCR
Low profile bags made of OffLow profile bags made of Off
Road MC innertubes inRoad MC innertubes in
protective Cordura covers.protective Cordura covers.
Easy patching withEasy patching with
bicycle repairkit!bicycle repairkit!
Hydrostatically ”neutral” dueHydrostatically ”neutral” due
to unique curved shape andto unique curved shape and
positioning overshoulders,positioning overshoulders,
along side of chest, leavingalong side of chest, leaving
front area unclutteredfront area uncluttered

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ScrubberScrubber
used absorberused absorber
Unused absorberUnused absorber
Axial Design:Axial Design:
Gas flows through the scrubberGas flows through the scrubber
cartridge in a lineardirectioncartridge in a lineardirection
Active zoneActive zone
Gas flow directionGas flow direction

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OO22-Sensors-Sensors
Instant ValidationInstant Validation
 During the dive exhale half aDuring the dive exhale half a
breath fromyournosebreath fromyournose
 Slowly inhale and monitorPO2Slowly inhale and monitorPO2
Displays as the ADV feeds DILDisplays as the ADV feeds DIL
across the sensormembranes.across the sensormembranes.
 Multiply the ambient pressure byMultiply the ambient pressure by
the DIL FgO2the DIL FgO2
 Example: AirDIL at 20 mswExample: AirDIL at 20 msw
should read 0.63 BARshould read 0.63 BAR

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PO2 DisplaysPO2 Displays
 One 9V battery inOne 9V battery in
sealed compartmentsealed compartment
 Duration 1 monthDuration 1 month
 Switch when ”B” isSwitch when ”B” is
lit.lit.
 One magnetic switchOne magnetic switch
forpowerandforpowerand
backlightbacklight
 Keeps working ifKeeps working if
floodedflooded
 Keep visible andKeep visible and
watch PO2 often!watch PO2 often!

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Oxygen feed systemOxygen feed system
DCCCRWorking PrincipleDCCCRWorking Principle
 Needle valve is setNeedle valve is set
to O2 LPMfordiverto O2 LPMfordiver
at rest at plannedat rest at planned
max depth usingmax depth using
flow meterand tableflow meterand table
 Manual ad valveManual ad valve
used to quicklyused to quickly
bring the PO2 up tobring the PO2 up to
set pointset point

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Oxygen ControlOxygen Control
DCCCRWorking PrincipleDCCCRWorking Principle
 Divermust know his/heraverage metabolic rateDivermust know his/heraverage metabolic rate
 The diverselect a suitable needle valve flow rate forThe diverselect a suitable needle valve flow rate for
the maximumplanned depththe maximumplanned depth
 Oxygen sensors positioned in the inhale side of theOxygen sensors positioned in the inhale side of the
loop measure the mV levelloop measure the mV level
 The O2 monitors convert the mV to a PO2 valueThe O2 monitors convert the mV to a PO2 value
 The divermanually ad O2 if neededThe divermanually ad O2 if needed
 If PO2 is too high, exhale from the nose. NextIf PO2 is too high, exhale from the nose. Next
inhalation will ad diluent fromthe ADVinhalation will ad diluent fromthe ADV
 If you need to feed O2 manually often – turn up theIf you need to feed O2 manually often – turn up the
needle slightlyneedle slightly
 If the PO2 creeps up often – turn down the needleIf the PO2 creeps up often – turn down the needle
slightlyslightly

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ADVADV
 Automatically feeds DILAutomatically feeds DIL
across cell membranesacross cell membranes
and in to loop whenand in to loop when
counterlungs collapsecounterlungs collapse
 More sensitive inMore sensitive in
vertical positionvertical position
 Tuned for9 barIPTuned for9 barIP
 Instant cell validationInstant cell validation
requires trimmed cellsrequires trimmed cells

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Depth OXYGEN MASS FLOW CHART
0 msw
0,4
LPM
0,45
LPM
0,5
LPM
0,55
LPM
0,6
LPM
5 msw 0,42 0,47 0,53 0,58 0,63
10 msw 0,44 0,50 0,55 0,61 0,66
15 msw 0,46 0,52 0,58 0,63 0,69
20 msw 0,48 0,54 0,60 0,66 0,72
25 msw 0,50 0,56 0,63 0,69 0,75
30 msw 0,52 0,59 0,65 0,72 0,78
35 msw 0,54 0,61 0,68 0,74 0,81
40 msw 0,56 0,63 0,70 0,77 0,84
45 msw 0,58 0,65 0,73 0,80 0,87
50 msw 0,60 0,68 0,75 0,83 0,90
55 msw 0,62 0,70 0,78 0,85 0,93
60 msw 0,64 0,72 0,80 0,88 0,96
65 msw 0,66 0,74 0,83 0,91 0,99
70 msw 0,68 0,77 0,85 0,94 1,02
O2 Mass flow chartO2 Mass flow chart
Find max depthFind max depth
Find desiredFind desired
O2 dosageO2 dosage
Find surfaceFind surface
flow rateflow rate