ADV located under the top lid (behind the blue O2 hose to solenoid/CMF)
Flex CCR comes configured with and ADV (automated diluent valve) under the top lid of the unit.
Diluent MAV (manual add valve) and Oxygen MAV facilitate on demand gas additions by diver.
MAVs are connected to the hose bayonets on top of the units via Miflex hoses Oxygen MAV LP hose is attached next to the exhalation hose bayonet. This supplies oxygen from the manual add valve (MAV), which enters the loop just below the breathing hose bayonet. This means the O2 must travel through the rest of the circuit before being inhaled, giving plenty of time for adequate mixing before passing over the O2 cells and being breathed.
Diluent and Oxygen MAVs
Diluent Miflex hose is attached next to the inhalation hose. It delivers diluent via the diluent manual add valve. In this configuration there is a direct path from injected diluent to divers mouth, even if closed circuit is blocked or compromised anywhere else.
O2 and Dil MAVs
Flex uses Omniswivel or Swagelok quick connects to connect diluent and oxygen cylinders.
Gas Path
BOV
Sidemount DSV
Starting at the mouthpiece (either Golem Shrimp BOV or DSV with 90 degree adapters or dedicated Sidemount DSV) , exhaled gas leaves the mouthpiece and flows down into the top of the unit. Where the corrugated breathing hose enters the top plate of the unit through a bayonet connector, a Miflex hose enters next to the bayonet. This supplies oxygen from the manual add valve, which enters the loop just below the breathing hose bayonet. This means the O2 must travel through the rest of the circuit before being inhaled, giving plenty of time for adequate mixing before passing over the O2 cells and being breathed.
Top plate with hose bayonets
Gas then enters the exhale C/L immediately below the top plate. This C/L contains an OPV/dewatering valve, which can also be manually activated via a drawstring. After the exhale lung, gas passes through the rebreather head and down into the outside of the scrubber can, before entering the scrubber from outside in.
Counterlungs
Gas enters the scrubber then passes up the inside of the scrubber to a chamber containing the 3 oxygen cells. The oxygen sensors are in removable cartridge/carrier that can be easily detached for storage in a dry place.
CMF/Leaky Valve
Past the cells, up into the inhale C/L, gas then leaves the unit via the inhale hose to the diver. Again, at the point where the inhale hose attaches to the top lid there is another Miflex hose which delivers diluent via the diluent manual add valve. At the head, two other Miflex hoses are seen entering via a radial slot. These hoses supply O2 to the “leaky”/CMF valve or solenoid and diluent to the diaphragm based ADV located under top of the lid, its purge button accessible from the front of the unit.. Two hoses come from the oxygen block (CMF or solenoid valve and manual add) and two from the diluent block (ADV and manual add). The gas supplies could be configured in a number of ways and supply to both drysuit and wing also needs to be considered