Andrei Yashin’s Ray

Andrei Yashin’s Ray rebreather

Andrei Yashin from Moscow Russia sent me some modifications he made on his Dräger Ray. Of special interest is the orifice he made at home. If you are interested in how to calculate such orifices please check my website for further information. Andrei uses his modified Ray about 3 years now for depths up to 40 meters and at water temperature from 0 to +30 C. For other Ray modifications check out the semiclosed homebuilderpages of my web here:
https://newwebsite2019.therebreathersite.eu/category/homebuilders/homebuilders-active-semi-closed-system-ascs/

Enjoy!

Andrei, thanks for your contribution!

The nozzle is redesigned by me to use EAN 40 at 8 l/min (enough for me at all range of workloads).
Orifice diameter 0,3mm, supply pressure – 10,5 bar. On the picture left – Dräger standard unit, on the right – self-made injector.

I also added bubble-deflectors. They are made of foam-rubber

Pressure reducer made ambient-pressure isolated (Fixed IP) using self-made nuts and high-pressure silicon compound (made by Loctite®)

Added ring-weights to compensate breathing hoses buoyancy. Rings made of stainless steel with anti-glow cove

Here you see the weigh compensating rings mounted on the loop.

For cold-water diving added thermal-protection cover for scrubber canister. 7-mm neoprene. It worked well in water of about 0 C,
at ice dives in the White Sea (Far North of Russia).

Questions can be sent to Andrei on these email link: ay@rjc.ru or ymail@bk.ru