Dräger BS8468-1 User manual

3356838 (A3-D-P) 1 / 3
BS8468-1 lung demand valve (LDV)
With CBRN special instructions for breathing apparatus Instructions for use
i
1 Safety-related information
– Before using this product, carefully read these instructions for use and
those of the associated products.
– Strictly follow the instructions for use. The user must fully understand
and strictly observe the instructions. Use the product only for the
purposes specified in the intended use section (see section 3.2).
– Do not dispose of the instructions for use. Ensure that they are
retained and appropriately used by the product user.
– Only trained and competent users are permitted to use this product.
– Comply with all local and national rules and regulations associated
with this product.
– Only specialist, trained personnel are permitted to check, repair and
maintain the product as described in these instructions for use. Further
maintenance work that is not detailed in these instructions for use must
only be carried out by Dräger or qualified personnel. Dräger
recommend a Dräger service contract for all maintenance activities.
– Only use genuine Dräger spare parts and accessories when
performing maintenance work, or the proper functioning of the product
may be impaired.
– Do not use a faulty or incomplete product. Do not modify the product.
– Notify Dräger in the event of any component fault or failure.
2 Conventions in this document
2.1 Definitions of alert icons
The following alert icons are used in this document to provide and highlight
areas of the associated text that require a greater awareness by the user.
A definition of the meaning of each icon is as follows:
WARNING
Indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation which, if not avoided, could
result in physical injury. It may also be used to alert against unsafe
practices.
NOTICE
Indicates a situation which, if not avoided, could result in damage to the
product or the environment.
2.2 Typographical conventions
► A triangle is used in safety statements to indicate possible ways of
avoiding the hazard.
An information symbol is used for notes and additional useful
information.
1. Numbered paragraphs indicate that the information is sequential.
– Dashed paragraphs indicate that the information is non-sequential.
2.3 Trademarks
The following website lists the countries in which the Dräger trademarks
are registered: www.draeger.com/trademarks.
Molykote® is a registered trademark of DDP Specialty Electronic Materials
US 9, LLC.
The trademarks listed are only registered in certain countries and not
necessarily in the country in which this document is published.
3 Description
3.1 Feature description
The Dräger BS8468-1 positive pressure lung demand valve (LDV) controls
the breathing air supplied into the mask of a breathing apparatus wearer.
The lung demand valve connects the medium-pressure supply from the
breathing apparatus to the mask, and a sealed and balanced piston unit
inside the valve controls the quantity of air flow through the valve in
response to the breathing demand of the wearer.
The positive-pressure valve maintains a greater pressure than
atmospheric inside the mask. Although the pressure drops as the wearer
inhales, the pressure inside the mask remains above atmospheric.
3.2 Intended use
When the product is used with an approved breathing apparatus, face
mask and cylinder, it provides a wearer with respiratory protection for
working in contaminated or oxygen-deficient conditions, including CBRN
(Chemical, Biological, Radiological and Nuclear) scenarios.
To ensure approved protection in CBRN scenarios, the Dräger BS8468-1
lung demand valve must only be used in the approved breathing apparatus
configurations specified in the BS8468-1 configuration matrix that
corresponds to the breathing apparatus. Contact Dräger for details.
WARNING
Using unapproved equipment combinations is unsafe.
► Only use the lung demand valve with approved Dräger face masks in
CBRN environments.
► Contact Dräger for a list of the equipment combinations that are
approved for CBRN use in the breathing apparatus.
3.3 Approvals
The European standards, guidelines, and directives according to which
this product is approved are specified in the declaration of conformity (see
the declaration of conformity or www.draeger.com/product-certificates).
The BS8468-1 lung demand valve is approved for use with Dräger Self-
Contained Breathing Apparatus (SCBA) protection equipment meeting the
requirements of BS8468-1, EN137:2006 Type 2 and EN136:1998 Class 3.
Only a Dräger face mask complying with EN136:1998 Class 3 and marked
with BS8468-1 must be used in conjunction with the approved
configurations for respiratory protection in CBRN scenarios.
To ensure complete protection in CBRN scenarios, Dräger advise that
users should consider a personal protective ensemble conforming to
BS8467.
Specific kits are available of BS8468-1 conforming lung demand valves
and face masks to be used with Dräger breathing apparatus. Contact
Dräger for details.
3.4 Explanation of type-identifying marking and
symbols
NOTICE
The device may be damaged, or approvals invalidated, by engraving it, or
by applying chemical marking or paint.
► Do not use marker pens or apply paint, and do not scratch or engrave
the device.
► Dräger recommend using adhesive labels to add personal marking to
the device.
Refer to the relevant authority for explanation of approval body symbols
and marking on the equipment. Examples of other marking on component
parts of the breathing apparatus are:
4 Use
WARNING
Only trained and competent users (those who have attended a relevant
training course) are permitted to prepare and use this product.
► Ensure that any accessories, ancillary equipment, and other
protective clothing items do not interfere with the breathing apparatus
and do not create a safety hazard.
4.1 Prerequisites
WARNING
If there is not a good seal between the mask and the face of the wearer,
the mask may leak inward or outward during use.
► Select and test the face mask from the available sizes.
Ensure that you have selected and are using the correct size face mask.
– The face mask is available in 3 sizes. The size is marked on the left
side of the mask.
– S – small
– M – medium
– L – large
– The nose cup is available in 3 sizes. The size is marked on the front of
the nose cup, and is visible through the visor.
– 1 – small
– 2 – medium
– 3 – large
4.2 Preparation for use
4.2.1 Fitting the fabric head harness (optional)
The face mask is supplied as standard with a five point adjustable rubber
head harness fitted. If it is required to use the five point adjustable fabric
head harness, fit the harness as follows:
1. Remove the 5-point adjustable rubber head harness by pushing
forward each of the five plastic buckle attachments (Fig 1, Item 1) until
the buckle clicks out of place from the stud. Lift and remove each
buckle from the stud.
2. Attach the 5-point adjustable fabric head harness to the mask.
3. Position the non-adjustable buckle to the top forehead attachment
(centre) of the face mask. Ensure that the head harness is positioned
so that the finished side of the harness will be seen when the mask has
been donned (Fig 2, Item 1).
4. Place the larger keyhole circle on the buckle over the studs and pull
the buckle back until the smaller keyhole circle of the buckle clicks and
locks onto the stud. Repeat this procedure with each of the remaining
buckles.
When correctly assembled, the pull tabs on the adjustable straps will be
located away from the head when worn (Fig 2).
BRXX-1234 – Dräger serial number
P – Positive-pressure
09/09 – Month and year of manufacture
3356812 or R21034 – Dräger part number
– Barcode of serial number
1
2116
1
2
4710
1
4.2.2 Pre-use inspection
Carry out a full visual inspection of the equipment as detailed in the
breathing apparatus instructions for use and section 5.3.
Ensure the retaining groove of the connector (Fig 3, Item 3) and the mask
port are clean and free from foreign material. Inspect the connector O-ring
for damage and dirt, and ensure that lubricant is present on the surface of
the O-ring.
For an ESA type lung demand valve, check the release buttons on the side
of the lung demand valve. Briefly press both buttons and ensure that they
depress and then return without restriction.
Clean parts as necessary (see section 5.2), and ensure that any damaged
or faulty parts are replaced before use. Check the O-ring on the lung
demand valve. As a guide, lubricant should be felt on the fingers but not
seen. If relubrication is required, lightly apply Molykote®111 (other
lubricants are not tested and may damage the equipment).
4.2.3 Connecting the LDV
1. Disconnect and then reconnect the male coupling of the lung demand
valve hose. To connect, press the male coupling into the female
coupling until an audible click is heard. If there is any difficulty
disconnecting or connecting, see the troubleshooting information in
the breathing apparatus instructions for use.
2. Press the reset button (Fig 3, Item 1) to switch off the positive
pressure.
3. Open the cylinder valve (counterclockwise) slowly, but fully, to
pressurise the system.
– After storage at temperatures below 0 °C leakage may be observed
when the cylinder valve is initially opened due to ice formation.
– If leakage is observed from the lung demand valve, press the front
button (Fig 3, Item 2) to allow a rush of air to pass through the lung
demand valve and then quickly press the reset button (Fig 3,
Item 1) to switch off the positive pressure. Resume normal
operation.
– If leakage still occurs, remove the breathing apparatus from
service and report the fault to trained service personnel or contact
Dräger.
4. Carry out all functional testing as described in the breathing apparatus
instructions for use.
5. Align and push the lung demand valve into the face mask port until it
clicks into position (Fig 4). Check the attachment by gently attempting
to pull the coupling apart.
4.2.4 Putting on the face mask
WARNING
Correct fit of the face mask can only be achieved if the complete mask seal
contacts the skin.
► Do not allow head hair styles (buns, pony-tails, hairpieces, etc.) to
affect the fit of the face mask.
► Do not allow head hair, facial hair (including beard stubble and
sideburns), earrings, other facial piercings, and normal spectacles to
interfere with the face mask seal.
See also the face mask selection information (section 4.1).
1. Inspect the face mask: ensure that head harness is securely attached,
the nose cup is correctly located and secure, and that all parts are in
good condition.
2. If fitted, move the spectacle frame to the preferred position.
3. Fully extend the straps of the head harness (Fig 5).
4. Place the carrying strap over the head and locate the face mask on the
chest. (Dräger recommend using the carrying strap to position the
mask in this way to prevent damage and dirt ingress until the mask is
put on.)
5. If fitted, clip the communication system push-to-talk (PTT) button to a
suitable chest location.
6. Spread the head harness and place the chin into the face mask.
7. Pull the head harness over the head and centre the fabric panel (Fig 2,
Item 1), ensuring the straps are flat and not twisted.
8. Ensure that nothing is interfering with the face seal (hair, head
harness, carrying strap, etc.). Also ensure that the full face seal is
touching and following the contours of the face.
3
2739
D
r
ä
g
e
r
1
2
3
4
2867/2863
5
4709

3356838 (A3-D-P) 2 / 3
BS8468-1 lung demand valve (LDV)
With CBRN special instructions for breathing apparatus Instructions for use
i
9. Tighten the neck straps (Fig 6, View A) and then the temple
straps (Fig 6, View B) evenly towards the back of the head. Ensure
that the fabric panel of the head harness remains positioned in the
centre of the head.
4.2.5 Check by a second person
Immediately after putting on the mask, each wearer must be checked by a
second person to ensure correct fitting. The second person must look for:
– Mask fitting errors:
– Hair between seal or visible separation from face (Fig 7, View A)
– Detectable separation from face (Fig 7, View B).
– Head hair, sideburns, piercings, or anything else that could be
interfering with the face seal.
– Twisted straps.
– Any other indications that the face mask is not being worn correctly.
4.2.6 Negative pressure fit check
1. Carry out the following negative pressure fit check:
a. Inhale and hold breath. Ensure that there is no audible leak.
b. Recommence breathing. Exhaled air should flow easily from the
exhalation valve.
c. Close the cylinder valve and breathe normally to empty the
system. When the breathing apparatus gauge indicates
zero (system empty), inhale and hold breath for approximately
8 seconds. Ensure that the mask collapses and holds on to the
face to indicate a positive seal.
– If the negative pressure holding the mask on to the face decreases, the
mask is not sealing properly. Readjust, or remove and refit, the mask
and then repeat the negative pressure fit check.
WARNING
If there is not a good seal between the mask and the face of the wearer,
the mask may leak inward or outward during use.
► If a satisfactory face seal is not achieved after a second attempt at
fitting the mask, the wearer is not permitted to use the breathing
apparatus for CBRN applications.
2. Open the cylinder valve slowly, but fully, to pressurise the system, and
proceed as detailed in the breathing apparatus instructions for use.
4.3 During use
See breathing apparatus instructions for use.
4.4 After use
WARNING
Removing the breathing apparatus in a hazardous breathing environment
is unsafe.
► Do not remove the breathing apparatus until in a safe breathing
environment.
CAUTION
Exposure to CBRN contaminants could make the breathing apparatus
unsafe to use in the future.
► If it is known or suspected that the breathing apparatus has been
exposed to a CBRN contaminant, carry out an appropriate risk
assessment to establish any required actions. For example, consider
the suitability of the equipment for future use.
NOTICE
The equipment can be damaged if removed incorrectly.
► Do not remove the face mask by pulling on the lung demand valve.
1. Loosen the neck straps and the temple straps by lifting and pulling the
buckles forward (towards the front of the face mask).
2. At the point when the seal between the face mask and the face is
broken, press the reset button (Fig 3, Item 1) to switch off the positive
pressure.
3. Disconnect the lung demand valve from the face mask if required, as
follows:
– For an ESA type lung demand valve, simultaneously press both
buttons on the side of the lung demand valve (Fig 8, View A).
– For a push-in type lung demand valve, press the button on the
front of the face mask (Fig 8, View B).
A B
6
4705/4706
A B
7
4707/4708
A B
8
2868/2864
4. Hold the body of the mask and pull and lift to remove the mask.
5. Fully extend the straps of the head harness in preparation for the next
use (Fig 5).
6. Remove the breathing apparatus and carry out any maintenance,
cleaning, and testing as described in the instructions for use provided
with the breathing apparatus.
5 Maintenance
5.1 Maintenance table
Dräger recommend that regular inspection, testing and servicing of the
lung demand valve is carried out in accordance with the table below.
Additional maintenance may be required in the country of use to ensure
compliance with national regulations governing the use, maintenance,
examination and testing of this product.
5.2 Cleaning and disinfecting
CAUTION
Trapped water and ice inside the pneumatic system can impair the
operation of the product.
► Prevent any liquid from entering the pneumatic system, and
thoroughly dry the product after cleaning and disinfecting.
NOTICE
Using cleaning and disinfecting methods not described in this section can
damage the equipment.
► Do not exceed 60 °C for drying, and remove components from the
drying facility immediately when dry. Drying time in a heated dryer
must not exceed 30 minutes.
► Do not immerse pneumatic or electronic components in cleaning and
disinfecting solutions or water.
For information about suitable cleaning and disinfecting agents
and their specifications refer to document 9100081 at
www.draeger.com/IFU.
Refer also to the instructions for use for the breathing apparatus and other
associated equipment.
Work equipment
– Use only clean lint-free cloths
1. Clean the lung demand valve manually using a cloth moistened with
cleaning solution to remove excess dirt.
2. Apply disinfecting solution to all internal and external surfaces.
3. Rinse all components thoroughly with a cloth moistened with clean
water to remove all cleaning and disinfecting agents.
4. Dry all components using a dry cloth, in a heated dryer, or in air.
5. Contact service personnel or Dräger if disassembly of the lung
demand valve is required.
Do not immerse the valve. If fluids enter the valve, carry out the internal
cleaning procedure (see section 5.2.1).
5.2.1 Internal cleaning
NOTICE
Untrained personnel are not permitted to disassemble the breathing
apparatus as they could inadvertently damage the equipment.
► Internal cleaning may only be carried out by suitably trained
personnel.
Ultrasonic cleaning damages the diaphragm.
► Dräger recommend that ultrasonic cleaning methods are not used for
any part of the lung demand valve.
Cleaning solutions will eventually remove lubricants from moving parts.
Carry out functional tests following cleaning, disinfecting, and drying.
Relubricate moving parts as required.
1. Disassemble the lung demand valve:
Item Task After
use
Every
month
Every
year
Every
10 years
Lung
demand
valve
Check push-in type
connectors for lubricant1)
1. For type A check the O-ring on the lung demand valve; and for type
ESA check the outer surface of the male part of the push-in connector
on the lung demand valve. As a guide, lubricant should be felt on the
fingers but not seen. If relubrication is required, lightly apply
Molykote®111 (other lubricants are not tested and may damage the
equipment).
X
Visual inspection (see
section 5.3)
X X
Functional test (see
section 5.4)
X X
Breathing cycle and static
tests2)
2. These maintenance tasks may only be carried out by Dräger or trained
service personnel. Details of the tests are contained in the technical
manual which is issued to service personnel that have attended a
relevant Dräger maintenance course.
X
Check the male element of
the quick coupling for
burring (see section 4.2.3)
X
CBRN
diaphragm
Replace (see section 5.5) X
a. Remove the rubber cover (Fig 9, Item 1) from the front of the lung
demand valve housing.
b. Twist the bayonet cap (Fig 9, Item 2) counterclockwise to remove
it (a plate spanner is available for this task – Dräger part
number: R26817). Do not attempt to remove the spring from the
bayonet cap, and do not stretch, compress, or damage the spring
during cleaning and disinfecting.
c. Carefully grip the slip ring (Fig 9, Item 3). If required, rotate the slip
until the external lugs are free from the retaining lugs of the
housing (Fig 10). Remove the slip ring from the housing.
d. Carefully grip the centre of the diaphragm (Fig 9, Item 4) between
the thumb and forefinger. Tilt and remove the diaphragm from the
housing.
e. Replace the rubber cover (Fig 9, Item 1) on the front of the lung
demand valve to protect the main lever (Fig 9, Item 6).
2. Immerse and manually agitate the lung demand valve, diaphragm, slip
ring and bayonet cap in a cleaning solution.
3. Rinse all parts in clean water.
4. Immerse and manually agitate all parts in a disinfecting solution.
5. Remove the rubber cover from the front of the lung demand valve and
rinse all parts in clean water, taking care not to damage the main lever.
6. Press the reset button (Fig 9, Item 5) to switch off the lung demand
valve and then connect the lung demand valve hose to a medium-
pressure breathing air supply (minimum of 4 bar).
WARNING
Compressed air is forceful, and may cause injury by dislodging particles or
by entering the body.
► Do not direct the airflow on to the face, eyes, or skin.
7. Lightly press the main lever to blow away any moisture.
8. Disconnect the air supply and dry all parts using a clean lint-free cloth
or a dedicated drying facility.
9. If relubrication of the moving parts is required, position the main
lever (Fig 11, Item 1) and secondary lever (Fig 11, Item 2) as shown.
Apply 2 short squirts of silicone spray lubricant (Dräger part number
1563343) to the circled area in the direction indicated by the arrow.
10. Reassemble the lung demand valve as follows:
a. Carefully install the diaphragm in the correct orientation (Fig 9,
Item 4) into the lung demand valve housing.
b. Carefully insert the profiled side of the slip ring into the housing.
Ensure that the slip ring sits in the bead of the diaphragm.
c. Position the spring in the middle of the diaphragm. Twist the
bayonet cap clockwise to fit it to the lung demand valve housing.
d. Replace the rubber cover on the front of the lung demand valve.
e. Press the reset button to switch off the lung demand valve.
f. Carry out a full functional test of the lung demand valve (see
section 5.4).
9
0584
1
6
2 3 4 5
10
5103
1
2
11
4912

3356838 (A3-D-P) 3 / 3
BS8468-1 lung demand valve (LDV)
With CBRN special instructions for breathing apparatus Instructions for use
i
5.3 Visual inspection
Check that the lung demand valve is clean and undamaged. Pay particular
attention to levers, diaphragm, spring, hoses and connectors. Typical
signs of damage that may affect the operation of the lung demand valve
include impact, abrasion, cutting and discolouration.
Report damage to trained service personnel or Dräger. Do not use the lung
demand valve until the faults are rectified.
5.4 Functional testing
WARNING
Failure of the breathing apparatus to meet any of the standards or
parameters described in the functional tests indicates a system fault.
► Report the fault to trained service personnel or contact Dräger. Do not
use the breathing apparatus until the fault condition is rectified.
Test the lung demand valve as described in the functional and leak test
procedure in the breathing apparatus instructions for use.
5.5 Replacing the diaphragm
WARNING
The diaphragm must be replaced after 10 years to ensure that it is safe to
use in CBRN scenarios.
► The diaphragm must be replaced 10 years after the production date
shown on the production date stamp.
► The period of 10 years must not be counted from the date that the
diaphragm entered service.
Ensure that only the correct diaphragm (Dräger part number 3703410) and
the correct spring (Dräger part number 3338768) are used.
1. Remove the defective diaphragm and install the replacement.
Instructions for removing and fitting the diaphragm are contained in the
internal cleaning procedure (see section 5.2.1).
2. Carry out a full functional test of the lung demand valve (see
section 5.4).
5.6 Decontamination
Contamination avoidance, mitigation, and decontamination practices
should be planned out and trained for in advance.
Refer to local and national procedures for the decontamination and
disposal of contaminated CBRN breathing apparatus.
Operational guidance for CBRN decontamination is given in Fire and
Rescue Service Operational Guidance - Incidents Involving Hazardous
Materials (ISBN 9780117541092), part C-15.
6 Cautions and limitations for CBRN use
– Use in conjunction with personal protective ensembles that provide
appropriate levels of protection against dermal hazards.
– Some CBRN agents may not present immediate effects from
exposure, but can result in delayed impairment, illness or death.
– Direct contact with CBRN agents requires proper handling of the
SCBA after each use and between multiple entries during the same
use. Decontamination and disposal procedures must be followed. If
contaminated with liquid chemical warfare agents, dispose of the
SCBA after decontamination.
– The breathing apparatus should not be used beyond 6 hours after
initial exposure to chemical warfare agents to avoid possibility of agent
permeation.
7 Transport
Transport the product in its original packaging.
8 Storage
– Store the product between -15 °C and +25 °C.
– Ensure that the environment is dry, free from dust and dirt, and does
not subject the equipment to wear or damage due to abrasion.
– Do not store the equipment in direct sunlight.
– Route rubber hoses in such a way that the bend radius is not too acute
and the hose is not stretched, compressed, or twisted.
9 Disposal
9.1 General
Dispose of the product in accordance with applicable rules and regulations
in the country of use.
10 Order list
11 Manufacturer and document information
Manufacturer
Dräger Safety UK Limited
Ullswater Close
Blyth, NE24 4RG
United Kingdom
Tel: [phone]
Fax: [phone]
www.draeger.com
3356838_en
© Dräger Safety UK Limited
Edition: 3 – May 2022 (Edition: 1 – February 2008)
Subject to alteration
Description Quantity Order code
Molykote®111 100 grams 3331247
Plate spanner 1 R26817
Silicone spray lubricant 500 ml 1563343