consist of the robust Canister made of a marine grade hard anodized aluminum with
teflon coating or optionally made of Delrin.
The XCCR is standardly equipped with Back-mounted
Counterlungs made as the separated inhalation and
exhalation counterlungs connected all in one piece by a
central support plate.
The Counterlungs are made of a double layer.
The Outer shell is made of Cordura fabric, protects the
inner bladder and bears all fasteners. The outer shell is
equipped with D-rings for attaching divers’s accessories
and with Velcro straps on the side for attaching the LP
hoses leading from the manifold.
The Inner bladders are gas-tight bags made of soft
Cordura with PU coating and are accessible through
zippers at the middle of the outer shell.
The Counterlungs are equipped with the trapezoidal
threaded fitting for connecting the T-pieces providing
connection to the breathing loop
The exhalation counterlung is equipped with the
adjustable Over pressure / dump valve allowing easy
to drain eventual water. The over pressure / dump valve
can be operated manually by pulling the string. The over
pressure / dump valve can be tighten to allow the
positive pressure test of the loop, while during the dive it
has to be in the open position ensuring maximum
overpressure in the breathing loop less than 40 mbar.
The Counterlungs can be easily removed for cleaning,
disinfection, drying or storing
The XCCR can be optionally equipped
with the Front-mounted Counterlungs,
configured as the top of the shoulders
The Front Mounted Counterlungs are equipped
with inflating valves for direct manual adding of
oxygen or diluent into the loop.
The inflating valves may rotate the full 360° range.
The low-pro f led T-pieces are used to connect the breathing hoses to the Counterlungs.
The T-pieces are made of Delrin and are connected to the Counterlungs via a socket and
fastened by a nut with trapezoidal thread resistant to damage. T-pieces attached to the
Counterlungs may still rotate the full 360° range.
The Inhalation T-piece has integrated ADV
(Automatic Diluent Valve) and LP inlet connected to the
Diluent Manual Adding Valve.
The ADV – automatic diluent valve is integrated into the
The ADV is designed in a similar way like a 2nd stage
regulator. It is activated by a negative pressure in the
breathing loop and automatically adds diluent to the
breathing loop when needed.
The ADV is standardly equipped with the Shut-off valve that can shuts off diluent from the
connected LP hose. The Shut-off valve is operated by sliding the black switching ring up
or down. It is useful in the event when if the diver wants to have the adding of diluent
under his full control or in case of malfunction of the ADV if that would happened
The Exhalation T-piece has integrated LP
inlet connected to the Oxygen Manual Adding
Valve and an integrated inner rib acting as a
water trap that directs the breathing gas
directly into the exhalation Counterlung,
where eventual water can be easily drained
out through the Over pressure / dump valve
MAVs – manual adding valves
For adding diluent or oxygen into the loop, the Counterlungs
are equipped with standalone manual adding valves (MAVs),
connected via a LP hose leading from the appropriate
manifold to the lateral inlet on the T-pieces at the
The MAVs are made of Delrin with a metal button valve and
connecting fittings. The button for oxygen adding is marked
by a small nipple, while the button for diluent adding is
marked by a dent.
The MAVs have additional connecting port for optional
connecting off-board gases via QC6 quick-connect coupler.
BOV Shrimp – Bail-Out Valve (BOV)
BOV Shrimp a Bail-out Valve with a 2nd stage regulator incorporated into the mouthpiece
with the ability of supplying the diver with open circuit breathing gas when needed.
The BOV Shrimp is a standard part of the XCCR loop.
The CC/OC valve allows to easily and fast switch between the close circuit (the CC mode)
and the open circuit (OC mode) by one hand. It is operated by rotating the knob on the
front of the BOV.
When the BOV is switched to the CC mode – the breathing loop is open via the
mouthpiece and allows the diver to breathe on the rebreather closed circuit.
When the BOV is switched to the OC mode – the breathing loop is closed and allows the
diver to breathe on open circuit via the 2nd stage regulator. In this position no water can
enter the breathing loop even when the BOV is out of the diver’s mouth and submerged.
The 2nd stage regulator has an adjusting knobt
allowing to adjust optimal breathing resistance.
One-way directional valves (mushroom valves)
provide and ensure the correct breathing gas
circulation in the breathing loop in the correct
direction from left to right, from the inhalation
counterlung to the exhalation counterlung.
Breathing hoses are connected to the BOV via the unique and secure Click-Lock
Bayonet Connectors. There is impossible to connect the breathing hoses incorrectly due
to different keying on each bayonet connector on the loop.
The BOV 2nd stage regulator is connected via the diluent manifold to the diluent cylinder
as well as can be optionally connected to an off-board bailout cylinder.
Learn more about XCCR: