AP Diving RB111 Operator's manual

Issue 6
Open Circuit Bailout Mouthpiece
User Instruction Manual

2 |P a g e A P D i v i n g O p e n C i r c u i t B a i l o u t
Contents
Copyright Notice................................................................................................3
Applicable Law: .................................................................................................3
Manufacturer:.....................................................................................................3
EC Type Approval: ............................................................................................3
EC PPE Article 11B Approval:...........................................................................3
General Precautions and Warnings...................................................................4
Introduction........................................................................................................5
Two Modes........................................................................................................6
The Dual Valve..................................................................................................7
Initial Configuration............................................................................................8
Preparation and Setup.......................................................................................9
PRE-DIVE INSPECTION check list.................................................................11
Diving With Nitrox............................................................................................14
Cold Water Diving............................................................................................15
Post Dive .........................................................................................................16
Maintenance Schedule....................................................................................17
Service and Repair..........................................................................................18
RB110 Main Assembly .................................................................................... 19
RB111 Dual Valve Assembly...........................................................................20
RB112 Front Cover Assembly.........................................................................21
Warranty Information.......................................................................................22

Page | 3
Copyright Notice
This instruction manual is copyrighted, all rights reserved. It may not, in whole or
part be copied, photocopied, reproduced, translated to any electronic medium or
machine readable form without prior consent from Ambient Pressure Diving Ltd.
©2008 - 2017 Ambient Pressure Diving Ltd.
OCB Instruction Manual
Please read the instructions in this manual carefully before using the Open Circuit
Bailout (OCB) mouthpiece.
Applicable Law:
All products are sold on the strict understanding that only English Law applies in
cases of warranty claims and product liability, regardless of where the equipment
is purchased or used. Should a claim be made then the venue for this would be in
Truro, England.
If this clause in not acceptable to you or your family then return the product
unused to your place of purchase for a refund.
Manufacturer:
Manufactured in the UK by Ambient Pressure Diving Ltd, Unit 2C, Water-Ma-Trout
Industrial Estate, Helston, Cornwall, TR13 0LW, Telephone [phone].
EU Type-Examination:
EU Type-Examination approved by SGS United Kingdom Ltd, Unit 202b Worle
Parkway, Western-Super-Mare, Somerset, BA22 6WA, Notified Body Number
0120.
EU Conformity Assessment:
on-going certification to allow CE marking under Article 11B of the PPE Directive
89/686/EEC is granted by Lloyds Register Quality Assurance Ltd. CE0088.

4 |P a g e A P D i v i n g O p e n C i r c u i t B a i l o u t
General Precautions and Warnings
Before using this OCB mouthpiece, you must receive instruction and certification
in diving rebreathers from a recognised training agency. Use of this OCB by
uncertified or untrained persons is dangerous and can result in injury or death. It is
very easy to configure the OCB and/or use it in an unsafe manner. Even if specific
training is undertaken in its configuration and use, it is still possible to injure
yourself through carelessness.
The Inspiration XPD, EVP and EVO closed circuit rebreathers’ CE certification to
EN14143:2013 is unaffected by the addition of this OCB mouthpiece.
OCB maximum certified depths: Closed Circuit = 100m. Open Circuit = 50m.
This OCB mouthpiece meets the requirements of the Personal Protective
Equipment Directive 89/686/EEC –CE certification when fitted to a first stage
regulator conforming to EN250:2014 or EN13949:2003 and to an Ambient
Pressure Diving Ltd rebreather.
This OCB mouthpiece is not configured for buddy-breathing (multiple users).
Factory / Dealer prescribed service for this OCB mouthpiece is recommended at
least once annually by a factory trained Ambient Pressure Diving service
technician. Disassembly or repair must not be attempted by persons who are not
factory trained and authorised by Ambient Pressure Diving.
Warning! Training alone is not sufficient to ensure your safety. Correct
maintenance and diligent use of the equipment is essential. If sufficient
forethought has not been given to equipment configuration, risk analysis, dive and
emergency planning you could with one simple operation –changing from CC
mode to OC mode –feed yourself gas which will not support life. DO NOT
underestimate your capacity to make a mistake. Everyone makes mistakes, but
making a mistake with the OCB can prove fatal.
Warning! If additional components are used in the medium pressure gas supply,
for instance a gas connection system or gas switching block, it is important to
realise that these may interfere with the gas flow to the OCB and degrade the
breathing performance preventing the OCB from supplying sufficient gas to a hard
working diver at depth. Additionally, if they interrupt the gas supply the OCB may
be critically damaged on descents.
Warning! DIVING WITH HYPOXIC GASES
Know your maximum and minimum operating depths of the gas connected
Using Hypoxic Gases ON or NEAR the surface has and will KILL!!
Check and double check –don’t underestimate your capacity to make a mistake!

Page | 5
Introduction
Thank you for choosing an Ambient Pressure Diving product. This OCB
mouthpiece has been designed and manufactured with pride under a Lloyds
Quality Assured BS EN ISO 9001 quality management system.
This OCB mouthpiece is covered by Ambient Pressure Diving’s 2 year warranty
against defects in materials or workmanship. This warranty is only extended to the
original purchaser, and is not transferable. For more information, be sure to read
the warranty section of this manual, and remember to save your sales receipt. A
copy of the receipt must be presented whenever obtaining warranty service.
The function and performance of the OCB relies greatly on the care and
maintenance it receives, in addition to regularly scheduled factory / dealer service.
Before you dive with your new OCB mouthpiece, it is important to read this manual
in its entirety to become familiar with its features, as well as the correct procedures
for setup, pre-dive inspection and post-dive maintenance.
Please read on to learn how you can obtain the maximum functionality from your
OCB mouthpiece, and maintain its like-new performance for many years to come.

6 |P a g e A P D i v i n g O p e n C i r c u i t B a i l o u t
Two Modes
The OCB Mouthpiece has 2 Modes:
1. CC. Closed Circuit rebreather diving position.
2. OC. Open Circuit diving position. This is the BAIL-OUT mode.
The two modes are selected by rotating the lever forwards or backwards, which in
turn rotates the internal components within the main body. The Rebreather mode
is activated by rotating the lever to the backward position where the lever is in line
with the mouthpiece. The Open circuit mode is activated when the lever is rotated
forward to the ‘up’ position.
The lever is best operated by the diver resting his right hand on top of the
corrugated hose and placing an extended thumb between the two lugs of the
lever.
REBREATHER
OPEN CIRCUIT

Page | 7
The Dual Valve
The OCB Mouthpiece utilises ‘AP’s new patented Dual Valve Technology. This
new demand valve enables the diver to quickly and easily change the medium
pressure (7 to 14 bar) supply hose routing from left hand to right hand, without the
need for major disassembly, adjustment or any special tools.
The Dual Valve can be switched between left hand and right hand in simple steps:
1. Turn the gas off and purge.
2. Unscrew (anti-clockwise) the supply hose and then the 9/16” UNF blanking cap
from the opposite end until the threads disengage and pull, withdrawing the
plunger. (If a tool needs to be used to undo these fittings, protect the plastic
moulding by preventing the Dual Valve Body from rotating by using a 17mm
spanner/wrench on the adjacent hexagon nut).
3. Fully screw the plunger into the blanking cap until the threads disengage and
then gently slide the plunger into the opposite side of the dual valve.
4. Screw the blanking cap on until it is tight against the shoulder, covering the
thread. You should be able to do this up without tools. If resistance is met, you
need to ensure the plunger is fully into the blanking cap and the threads are clean
and sufficiently lubricated with silicone or oxygen compatible grease, whichever is
appropriate for the gas you intend to use. While finger-tight is sufficient it is
prudent to just nip it up lightly using two 17mm spanners.
5. Reconnect the supply hose. Turn the gas on slowly and test for leaks and
breathing performance prior to diving.
CAUTION: When switching the valve from left to right hand hose routing, use two
17mm spanners/wrenches, one on the hexagon of the blanking cap or hose and
the other on the adjacent hexagon immediately next to the valve body. Using just
one spanner/wrench on the blanking cap or hose may damage the valve body.
RIGHT
LEFT

8 |P a g e A P D i v i n g O p e n C i r c u i t B a i l o u t
Initial Configuration
The OCB mouthpiece has been supplied with both Inhale (RB07/03) and Exhale
(RB/07/04) convoluted hoses. The hose length is set at the factory. These hoses
are shorter than the standard front rebreather hoses as the OCB is wider than the
standard mouthpiece. However, if the hose length is too long as shown above, the
hoses will need to be cut to the correct length. To reduce the length of the
convoluted hoses, follow the steps below:
1. Remove the convoluted hose from the T piece.
a. Using the special tool (RBTOOL12), undo the locking rings and remove the
split rings.
b. Pull the hose from the connector.
2. Cut the hose square, to the correct length using scissors.
3. Re-assemble in reverse order, ensuring the lips on the inside of the split rings
hook over the flange on the connector fitting.
4. Test for leaks prior to diving.
The OCB mouthpiece has been supplied with a 1.5m Medium Pressure (7 to 14
bar) Hose, so it can be used to supply gas from a side-mounted cylinder. For
supply from an onboard cylinder the hose may have to be shortened depending on
the hose routing and whether you connect direct to the first stage or to the
manifold.
Learn how to shorten AP Diving hoses with re-useable end fittings by following the
links below:
http://www.apdiving.com/en/rebreathers/resources/manuals/
http://www.apdiving.com/en/rebreathers/resources/videos/

Page | 9
Preparation and Setup
Careful consideration needs to be given to your intended use and purpose
for this product as this will greatly affect the setup and configuration.
a. Gas volumes available, particularly at depth, need to be considered and
be adequate for the intended use.
b. Similarly, gas types must be considered and be adequate for the intended
dive. e.g. Hypoxic gases fed through a 2nd stage are very dangerous in the
shallows allowing normal breathing right up until you lose consciousness.
It is very easy to make a mistake in the setup, particularly when changing
from a deep dive to a shallow dive and vice versa as the setup may be
different for each dive and you can easily introduce extra dangers if you
keep the same configuration.
Training and planning are essential and it is not within the scope of this user
manual to offer advice as to the best configuration for all dives but it is
essential to ensure you have a respirable gas mixture available at all depths
AND ensure you breathe the appropriate gas at the appropriate depth.
Failure to do so may result in loss of life.
Risk analysis is an essential part of dive planning. By using this type of
valve you have a single point failure for both open circuit gas and closed
circuit. It is recommended to include this fact in your risk analysis and
consider having an additional 2nd stage regulator on each cylinder intended
for open circuit breathing.
Whether you choose to feed the gas from an offboard cylinder or onboard –
the supply hose must be fitted to a suitable 3/8” UNF threaded outlet,
designated Low Pressure (LP) or Medium Pressure (MP). The supply
pressure must fall within the range 7 to 14 bar, nominally 9.5 bar. The valve
is balanced and should need no adjustment for the different pressures.
Warning! When in CC mode, the open circuit part of the valve is sealed,
unlike a normal 2nd stage which is always at ambient pressure. Therefore it
is essential to ensure the gas is switched on for the entire dive. If you leave
it switched off you will catastrophically damage the diaphragm. Switching
the gas on then off should also be avoided as catastrophic damage will still
occur to the diaphragm, it will just occur deeper than if you hadn’t turned the
gas on.

10 |P a g e A P D i v i n g O p e n C i r c u i t B a i l o u t
Preparation and Setup Cont…
It is recommended that you DO NOT fit an isolation valve, such as a flow-
stop slide valve, between the 1st stage and the OCB for three reasons:
1. If you do fit one and dive with it closed, the diaphragm will be
catastrophically damaged as you descend.
2. When it is closed the OCB’s pressure relief valve (which normally
operates at around 18 bar) cannot operate in the event of a first stage
“HP seat leak”.
3. If it is closed, you have turned a “one action to go to open circuit” into a
two action procedure.
However, if you fit an isolation valve, such as a Flow-stop slider, ensure:
a You dive with it OPEN.
b You fit an additional pressure relief valve, such as the APD RB17, to
the first stage.
c. You practice it’s operation often so you know for sure which way is
open.
Ensure the blanking cap has been securely screwed into the opposite side
of the dual valve from the medium pressure hose. If this is not correctly
located the OC demand valve will “free-flow”.
Warning! Check the medium pressure supply hose is connected onto the
OCB before opening the cylinder valve. If this is disconnected the flailing
hose end can cause serious damage to eyes or objects nearby.
Check for leaks by immersing in water.
Make sure the OCB mouthpiece is in the OPEN circuit position then depress
the purge button momentarily to blow out any dust, debris or water which
may have entered. Release the purge button and listen to ensure that the
OCB mouthpiece does not continue to flow air after the purge button is
released. If it free-flows due to the venturi, simply placing a finger over the
mouthpiece opening should be sufficient to disrupt the venturi effect and
allow the valve to close, the same as any normal high performance 2nd
stage.

Page | 11
PRE-DIVE INSPECTION check list
It is essential to perform a complete pre-dive inspection of your OCB mouthpiece
before every dive. NEVER dive with any diving equipment that shows signs of
damage, debris, loose connections or unsatisfactory performance.
As this valve has 2 modes, OC and CC, both modes must be checked prior to
diving as well as the switch-over.
1. Is it connected to the correct gas supply?
2. Is there sufficient gas volume and pressure?
3. Carefully inspect all hose fittings to ensure they are securely connected at
both ends. Inspect along the length of each hose to ensure that the hoses are
not blistered, cut, or otherwise damaged.
4. Visually inspect the OCB for any signs of external damage or debris.
5. Visually inspect the mouthpiece bite for damage or cuts and ensure it is
securely fastened to the OCB.
6. Check the rebreather non-return valves for back
leaks. Located at each end of the rotating inner are
non-return valves which are keyed to prevent
incorrect assembly. If disassembled, take care when
inserting the inhale (blue) non-return valve into the
left (inhale) side of the mouthpiece as the slot in the
blue valve holder MUST align with the ridge in the
mouthpiece tube. If it is inserted out of line, the blue
holder can be damaged irreparably increasing the
inhaled CO2. It is essential to check the direction
of gas flow and check the proper operation of the non-return valves
prior to each dive. The valves can leak due to debris left over from cleaning,
due to faulty assembly, worn components or due to being frozen open (in
freezing conditions). This check can be easily carried out by disconnecting
the hose connectors from the T piece and gently blowing and sucking against
the connectors. The direction of gas flow for the Ambient Pressure Diving
rebreathers is clockwise when looking down on the unit. i.e. you exhale over
your right shoulder. The correct flow direction is indicated by the arrow on the
mouthpiece moulding when the arrow is on top.

12 |P a g e A P D i v i n g O p e n C i r c u i t B a i l o u t
PRE-DIVE INSPECTION check list Cont…
Therefore, when blowing into the right hand side hose connector the non-
return valve will close and it should open when air is sucked from the
connector. The non-return valve on the other end of the mouthpiece inner
tube should close when air is sucked from the left hand connector and open
when air is blown into the connector.
After reassembling the hose to the unit check for correct operation by
alternately squeezing the inhale and exhale tubes as you inhale and exhale.
Gas must come from the left and go out to the right. You must not be able to
inhale gas from the exhale tube and exhale gas into the inhale tube.
NOTE: If reverse gas flow is required, i.e. for fitting to another make of
rebreather, the end of the keyway should be cut out of the bore so that it
doesn’t interfere with the non-return valve holder.
7. Ensure the blanking cap has been securely screwed into the opposite side of
the dual valve from the medium pressure hose. If this is not correctly located
the OC demand valve will “free-flow”.
8. Check for a smooth and positive switching operation between OPEN and
CLOSED modes.
9. Check the diaphragm and open circuit exhale valve for back leaks by
blocking the MP inlet with your thumb and inhaling. If the valve is in the open
circuit position and you can draw air in, there is a problem with the OCB
which must be addressed before diving. If you block the gas supply by simply
closing the supply valve you are likely to draw air in passed the 1st stage to
tank valve seal so it is unlikely that a proper negative pressure check can be
achieved.
10. In the CLOSED circuit position, carry out a positive and negative pressure
test of the breathing loop.
11. WARNING! Re-check the medium pressure supply hose is securely
connected onto the OCB before opening the cylinder valve. If this is
disconnected or comes loose the flailing hose end can cause serious
damage to eyes or objects nearby.

Page | 13
PRE-DIVE INSPECTION check list Cont…
12. Check to ensure that the submersible pressure gauge is displaying zero
pressure. If the system is depressurised and the gauge indicates a pressure,
the gauge must be replaced before diving.
13. SLOWLY open the cylinder valve to pressurise the OCB mouthpiece.
Continue to open the valve anti-clock-wise until the valve is fully open. It is
essential to dive with the supply valve open. By closing the supply valve the
OC portion of the OCB cannot equalise as you descend and the diaphragm
will eventually implode. Also, you introduce the need for another action in the
event of an emergency defeating the idea of the OCB from which you can
breathe open circuit gas by one simple action.
14. Check the submersible pressure gauge is displaying an accurate
measurement of the gas pressure inside the cylinder (ON and OFF board).
15. Make sure the OCB mouthpiece is in the OPEN circuit position then depress
the purge button momentarily to blow out any dust, debris or water which
may have entered the OCB mouthpiece. Release the purge button and listen
to ensure that the OCB mouthpiece does not continue to flow any air after the
purge button is released. A venturi induced free-flow may be stopped by
simply placing a finger over the mouthpiece orifice. (if this occurs underwater,
for instance when you remove it from your mouth and allow the mouthpiece
to point upwards simply rotate the OCB so the mouthpiece is pointing
downwards to stop the venturi, as you would with a normal second stage).
16. Still in the Open Circuit position inhale slowly and deeply from the OCB
mouthpiece several times. The OCB mouthpiece must deliver enough gas for
you to breathe easily without noticeable resistance.
17. Is the gas turned on?
18. Ensure you can see the Head Up Display. The OCB is wider than the
standard mouthpiece, so the HUD may need to slide across in it’s holder
towards the centre.

14 |P a g e A P D i v i n g O p e n C i r c u i t B a i l o u t
Diving With Nitrox
Your OCB mouthpiece has been prepared for use with 100% oxygen. This is
possible because each OCB is built to a high standard of cleanliness using oxygen
compatible components and lubricants. In addition, each OCB mouthpiece has
passed stringent adiabatic compression testing to ensure its safety and
compatibility with increased percentages of oxygen.
If it is your intention to use your new OCB mouthpiece with oxygen content higher
than 21%, it is imperative that you maintain the internal cleanliness of the OCB
mouthpiece and EN250, EN13949 certified First Stage. If it is your intent to use
the OCB mouthpiece interchangeably with breathing air, the breathing air should
be oxygen-compatible or “hyper filtered” with condensed hydrocarbons not
exceeding 0.01 mg/m3. Standard compressed breathing air, often referred to as
Grade E, does not necessarily meet this criterion.
Warning! At all times remember the maximum / minimum operating depth and
exposure time for the 02content of the breathing gas you are using.
Warning! When using gases with a high Oxygen content take EXTRA care to
open cylinder valves VERY slowly.
Warning! If the OCB mouthpiece is ever used with an oil contaminated gas supply
the complete valve will need a complete overhaul and re-clean before being used
with oxygen or oxygen enriched gases.

Page | 15
Cold Water Diving
The C.E.N. standards define cold water as 10°C or lower. In such conditions,
particularly in fresh water, which has a higher freezing point and more severe
thermoclines, there is a risk of freeze-up resulting in free flow and a rapid loss of
gas.
It is possible for icing or freeze-up to occur in the mouthpiece, even though the
OCB has been specially designed for cold water use. The following measures will
reduce the risk of freeze:
1. Request verification from your dive store that the air in your cylinder(s) is
dry. It should have a dew point below -54°C. Excess water vapour can
freeze, causing a freeflow condition, or blocking the flow of air entirely.
2. Protect your OCB mouthpiece from any contact with water until the moment
that you are ready to begin your dive.
3. Protect your equipment from cold temperatures before the dive. Keep your
OCB mouthpiece in a warm dry place.
4. Avoid breathing through the OCB mouthpiece or pressing the purge button
in very cold air before entering the water.
5. Avoid removing the OCB mouthpiece from your mouth during the dive. This
will prevent cold water from entering the OCB mouthpiece.
6. Try to avoid heavy exertion during the dive in order to minimise the volume
of air flowing through the OCB mouthpiece. Avoid discharges of air on the
surface. Do not continually press the purge button.

16 |P a g e A P D i v i n g O p e n C i r c u i t B a i l o u t
Post Dive
It is important to provide the proper preventative maintenance in order to ensure
the best possible performance and maximum life of your OCB mouthpiece. The
following maintenance procedures should be performed routinely after each use to
ensure that the OCB mouthpiece is cleaned, inspected, and prepared for the next
use or for storage:
1. As soon as possible after diving, the OCB mouthpiece should be rinsed
thoroughly with fresh water while it is attached to a cylinder and pressurised
with air. If disconnected ensure water does not enter.
2. However, rinsing alone will not sufficiently clean the OCB mouthpiece. To clean
the OCB mouthpiece as thoroughly as possible, it is necessary to soak it in
warm fresh tap water for at least one hour.
3. After rinsing be sure to check the Closed Circuit non-return valves are not
back-leaking.
4. Wipe the OCB mouthpiece as dry as possible and hang in the OPEN mode to
ensure all remaining moisture drains from the mouthpiece.
5. Store the OCB mouthpiece in a clean, dry place. Do not store the OCB
mouthpiece where it may be exposed to: extreme heat, ozone (electric motor),
chlorine or ultra violet rays.
6. Do not use any type of solvent or petroleum based substances to clean or
lubricate any part of the OCB mouthpiece. Do not expose any part to aerosol
spray.

Page | 17
Maintenance Schedule
To keep the OCB Mouthpiece running smoothly and efficiently it is imperative to
thoroughly wash and dry the unit after each dive as described on page 18. The
OCB mouthpiece also requires periodic dis-assembly and re-greasing of O rings
1,2 and 3, shown in the diagram below. The time-spans between dis-assembly
and re-greasing will vary depending on usage patterns. It is best to clean the
components in fresh water and re-grease the O rings whenever any excessive
stiffness or stickiness is felt, when rotating between the two modes.
Dis-Assembly and Re-Greasing Instructions:
1. Remove all hoses. The two convoluted hose nuts can be unscrewed once the
stainless steel locking screws have been removed.
2. Remove the location screw using a small screwdriver.
3. Withdraw the inner component from the outer, carefully.
4. Remove the 3 O rings and clean all components in fresh water.
5. Apply a smear of fresh Silicon Grease to the 3 O rings and re-assemble.
Applying excessive grease can cause problems, especially when diving in cold
water.
6. CAREFULLY re-insert the inner into the outer, taking care not to scratch the
bore or dislodge any of the O rings.
7. Align the groove in the inner component with the hole for the location screw
and re-insert the location screw into the outer, taking care with the O ring and
ensuring you do not over-tighten.
8. Re-connect all hoses. Rotate the convoluted hose nuts so the stainless steel
locking screws can go in the same holes they came from.
1
2
3

18 |P a g e A P D i v i n g O p e n C i r c u i t B a i l o u t
Service and Repair
Dealer Service & Repair
1. It cannot be assumed that any diving equipment is in good working order on
the basis that it has received little use since it was last serviced. Remember
that prolonged or improper storage can still result in internal corrosion
and/or deterioration of O-ring seals.
2. We recommend you obtain factory prescribed service for your OCB
mouthpiece at least once a year from an authorised dealer, regardless of
the amount of use it has received. Your OCB mouthpiece may require this
service more frequently, depending on the amount of use it receives and the
environmental conditions in which it is used.
3. If the OCB mouthpiece is used for rental or training purposes, it will require
complete overhaul and factory prescribed service every three to six months
or 50 hours continual use. Chlorinated swimming pool water is an especially
damaging environment for diving equipment due to the high levels of
chlorine and pH balancing chemicals which cause certain components to
rapidly deteriorate.
4. If water is allowed in the Medium Pressure gas inlet then more frequent
servicing will be required.
We recommend obtaining service for your Open Circuit Bailout mouthpiece
at least once a year, from the factory or an authorised dealer. Your personal
safety and the mechanical integrity of your OCB mouthpiece may depend on
it.
Factory Service and Repair
Returning Your OCB mouthpiece for Service
Whenever your OCB mouthpiece requires annual service take it or send it,
postage paid, to the factory or an authorised Ambient Pressure Diving dealer. For
help in finding a dealer in your area, please contact your local distributor. Your
distributor details can be found on our website www.apdiving.com or by
contacting the factory.

Page | 19
RB110 Main Assembly
No.
Part No.
Description
Qty
1
AP300
Inflator Hose Assembly
1
2
RB111
Dual Valve Assembly
1
3
RB112
Front Cover Assembly
1
4
RB114/1
Location Screw
1
5
RB116
Inner
1
6
RB02/04
One Way Valve Holder RH
1
7
RB02/03
One Way Valve Holder LH
1
8
BS.010
O Ring Seal
1
9
BS.029
One Way Holder Seal
2
10
BS.125
Mouthpiece Seal
1
11
BS.48X2.5
Inner / Outer Seal
2
12
RB115
Main Outer
1
13
AP21
Ty-rap
1
14
AP16
Mouthpiece
1
15
RB02/05
One Way Valve
2
16
RB116/1
Inner Lever
1
17
RB07/03
Exhale Hose Assembly
1
18
SC102
Hose Collar Screw
2
19
RB07/04
Inhale Hose Assembly
1
17
15
6
9
16
5
10
16
1
2
11
3
14
13
12
8
4
15
7
19

20 |P a g e A P D i v i n g O p e n C i r c u i t B a i l o u t
RB111 Dual Valve Assembly
No.
Part No.
Description
Qty
1
APV100/23
Silicone Valve Seat
2
2
BS.2.6x1
O Ring
1
3
BS.010
O Ring
3
4
BS.14.5x2.5
O Ring
2
5
RB111/1
Valve Body
1
6
RB111/10
Plunger
1
7
RB111/11
9/16” Blanking Plug
1
8
RB111/12
Lever Foot Insert
1
9
RB111/2
Counter Balance Piston
1
10
RB111/3
Counter Balance Cylinder
1
11
RB111/5
Dual Valve Spring
1
12
RB111/6
Lever
1
13
RB111/7
Valve Body End
1
14
RB111/8
Valve Locking Nut
1
15
RB111/9
Valve Seat Adjuster
2
15
6
14
5
7
16
1
10
11
12
4
2
13
3
9