TDI Semi-close Circuit Rebreathers
Dräger Rebreathers
Dräger has researched and developed Semi Closed
Circuit rebreather diving technology for many years;
this expertise is now available in the form of the
DrägerDolphin and DrägerRay SCC rebreathers.
TDI DrägerDolphin SCC Rebreather
The first rebreather released in 1995 as the Dräger
Atlantis before having a minor facelift and becoming
the Dräger Dolphin, this semi closed unit is
still as popular as ever with recreational and even
technical divers. It has been designed to use EANx
mixtures in a pre mixed cylinder to maximize the duration
of recreational dives. It is not intended, nor designed
to handle decompression dives, and we recommend a
depth limit of 35m. The system works on a constant
flow rate which means that the pre mixed Nitrox continually
flows through a small jet into the breathing loop.
The diver simply decides the maximum dive depth,  and
then selects the appropriate jet size to give enough
gas to breathe at the target depth. The diver then
cross-references a look up chart to determine what
the final 02% will be in the loop, and then plans
the dive. In 20m of water, the SCR should give you
nearly 2 hours of in water time.
Mounted with two breathing bags for increased breathing
comfort, the unit is supplied by a specific nitrox
mix, separate from the bailout tank. The active addition
system can be rigged with either a 32%, a 40%, a 50%,
a 60% or a pure oxygen jet. These jets deliver respectively
15.7L/min, 10.4L/min, 7.5L/min, 5.7 L/min and 1-2L/min.
Mounted with a typical size tank (4-5L) the Draeger
Dolphin will allow the diver to stay immersed for
1-3 hours.
The Dolphin breathing bags are built are back mounted,
tucked in the housing. The Inhale side holds a capacity
of 2L, the Exhale side capacity is 0.5L and is mounted
with the OPV that can be regulated between 18-25mmb.
Breathing  characteristic
form back mount bags are easy exhale and slightly
higher resistance when inhale, however if the diver
rolls over, the situation inverts.
The Dolphin's canister is an axial design and contains
2.5kg of sorbe allowing a maximum scrubber time of
180min (figures from Draeger). This canister can be
halved with the half fill canister device, ideal for
pool sessions or discover Rebreather diving or simply
for shorter immersions.
Prerequisites: Hold an open water certification
Hold a Nitrox certification
Course Duration: 2/3 days
TDI DrägerRay SCC Rebreather
One of the latest additions to the Rebreather world
is the new Dräger Ray SCR Rebreather. With its
over the shoulder counter lungs and very streamlined
design this unit is both easy and fun to dive. Again,
it is not intended, nor designed to handle decompression
dives, and has an operating depth limit of 22m.
The design of the Draeger Ray is extremely simple.
It's an all in one unit and carries only one tank
supplying the unit and the bailout. The unit is based
on a active addition system and can be rigged with
either a 32%, a  50%
or a pure oxygen jet. These jets deliver respectively
15.7L/min, 7.5L/min and 1-2L/min. Mounted with a typical
size tank (4-5L) the Draeger Ray will allow the diver
to stay immersed for 1-2 hours.
The Ray breathing bags are built in the BCD and are
X shaped. Resting on the diver shoulder, the bags
descend on the chest and in the back of the user,
making the breathing characteristic unique to the
Ray. The bags come in a single size 2.5L bags and
are mounted with to OPV that can be regulated between
18-25mmb.
The Ray's canister is an axial design and contains
1.25kg of sorbe allowing a maximum scrubber time of
70min (figures  from
Draeger).
Prerequisites: Hold an open water certification
Hold a Nitrox certification
Course Duration: 2/3 days
In addition to training we also sell and service
a variety of rebreathers and stock accessories, including
Sofnolime, Oxygen Cells, Rebreather Computers and
Computer Interfaces.
How Much Will This Cost ?
All TDI training materials and all the main equipment
rental are included in the course. You also need a
bottom timer or multi gas computer, a liftbag, and
a reel if you don't have any (these can be rent through
Diver's Network), you will need to pay for your gases.
Go
to check prices. EMAIL US with any questions.
What is a Rebreather?
What are the advantages
of using a CCR?
Frequently Asked
Questions on Rebreathers
CCR Rebreathers
( Close-circuit )
To view a Molecular Products declaration of SOFNOLIME
transport class as non-hazardous.
To view the material safety data sheet (MSDS) for
SOFNOLIME.
Padi / DSAT / ANDI and TDI Instructor and diver courses - Diver's Network - Subic, Manila, Anilao, Philippines. |
