There are four major parts of the rebreather shown.
1. The breathing loop
2. Oxygen injection to replaced respired oxygen
3. The dilution system to supply nitrogen or helium in the
form of air/nitrox/trimix/heliox for diving below 20 feet
4. PPO sensors and displays
Lets start with the breathing loop (upper left in the picture) the funny thing with two disks and a rod goes in the scrubber to hold the scrubber material in place.
1.1 The diver's exhausted air goes into the mouthpiece
(seen laying on the orange counter lung) with a shutoff and two one way valves
1.2 Exhausted air goes down (in reference to the picture)
and enters the white tube on the side of the scrubber.
1.3 Exhausted air enters the scrubber at the bottom
(on the left side in the picture) and flows to the right through the scrubber.
1.4 It enters a manifold at the top of the scrubber
and goes through the short fat black hose to the orange counterlung.
1.5. When the diver inhales the air goes back into
the manifold (from the counterlung) and through the large black hose at the top of the picture back to the mouthpiece and into the divers lungs. Round and round the loop the air goes scrubbing oxygen in the divers body and scrubbing C02 in the white scrubber canister.
2.1 Oxygen is replaced from the green and silver oxygen
tank on the lower left of the picture.
2.2 High pressure oxygen is reduced to low pressure by
the RGU regulator attached to the tank by an adaptor.
2.3 The RGU regulator has two features...the first is
a constant .9 liter per minute flow...the second is an injection button to add extra oxygen when necessary. (if the diver has been working hard for example)
2.4 The oxygen enters the loop at the bottom of the
scrubber to maximize mixing.
3.1 The yellow tank on the right side is a 6 cubic
foot air tank for dilution air.3.2 Connected to the air tank is a single hose two
stage regulator.3.3 The high pressure stage is on the tank and the
low pressure stage is a Scubapro air two.3.4 The Scubapro air two can be used as a regular
regulator and to fill a BC---or in this case the counter lung through the fat black hose to the top of the counter lung. (right side in the picture)
3.5 This gives me the ability to dilute the oxygen
in the counterlung or bailout using the Scubapro air two as a second stage regulator.....4.1 The PPO sensors and electronics are in the manifold
(1.4) that has a clear top making the displays visible.