Make no mistake, you are messing
with life support systems,
GET IT WRONG AND YOU DIE!
YOU HAVE BEEN WARNED
BACK TO INDEX
The final mods to the CCR project....at last:)
page is covering the Final Dolphin
I call this the Dolphin MK3 as it is the third modification to the rig
since all this CCR stuff took over from the original SCR rebreather.
final web page on the rebreather in its present form, I don't intend
to do more mods on this unit as I feel that nearly four years of playing
is enough. Now its time to get out there and just enjoy it.
The first thing was to pretty it up a little bit with a brand new Sea Quest Black Diamond Buoyancy compensator. This one was quite different from the old early versions of the BC that I had come to enjoy diving so much.
Next was to tidy up the tank mounts, to do this channel aluminum was cut down and a slot milled in the side. The "C" channel was then shaped using an angle grinder to fit snugly to the shell and maintain both tanks parallel to each other.
main parts now used are the Clippard Minimatics MJV-2 manual bypass valve
and the Swadgelok fine metering valve B-SM2-S2-A
picture shows the manual bypass valve, and sweated to the main body is
Swadgelok metering valve. This makes a nice sized package and is easy to use.
The metering valve is ported directly through the brass body saving space in the process.
Below is a picture of the prototype made up for testing and you can see the difference in
shot is of the shell where it is uncluttered with the only hoses entering
are for the oxyguage. All other hoses run up the side between the cylinders and the shell.
above shows the Dosing Head mounted in-between the two hoses and since
was taken we have replaced the 32% jet I was using as a flow restrictor and replaced it with a simple brass plug with a 1/64th hole drilled in the middle, this works well and does not require the maintenance that the jet did.
have been mounted in the breathing bag. You will see by the pictures that
the whole bag system is now uncluttered and the hosing runs up the outside
if the shell between the wing and the cylinders. This makes assembly and
testing for leaks a lot easier to do and
with no BC in the road or hoses is very neat layout.
This is a natural place for it and it is completely out of the road.
last job was to finally refit the over pressurization valve back into the
loop after diving with it out of the system for a time. And it is nice
to have an op safety mechanism back in the unit just in case I forget
to turn off the 02.
the setup now finished I find diving the rig very easy.
I have around sixty hours up now and feel it is about as good as it gets.
writing this I have another thirty odd hours up on the rig in its present
Basically the more I am using it the better it is getting and now I am happy to just dive the Rig.
Our new project is helping Barry Gill with is Dreager Ray CCR rig and to get a couple of
spare Dolphins for parts and to make up another two CCR rigs, for spares.
If you have any questions on anything that I have done please feel free to contact me as I will be more than happy to reply
My email address is firstname.lastname@example.org
Ok its time to go diving........:))
Copyright©2001,2002 Tubbies Rebreather Pages