Transcript CARBON COMPOSIT CYLINDER

BA SET DESCRIPTION
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Introduction
Carbon composite cylinder
Pressure regulator
Primary, secondary & Breathing hoses
Gauge & whistle manifold
Face mask & breathing valve
Carry frame
Harness
Ancillary equipment
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ADSU
Tally
Personal line
Torch
Flow of air
Standard tests
Log book
Design and use – Interspiro
Spiromatic 90QS CABA set
• Its designed to enable the wearer to breath and work in
atmospheres which would otherwise be irrespirable or
hazardous to health.
• Can be used in conjunction with a chemical protection
suit to give added protection when dealing with
hazardous materials
• The set itself is a lung governed, self contained, open
circuit type set which delivers cool air to the wearer in
accordance with their requirements. This simply means
the air flow is controlled by the wearer as he or she
breathes in and out.
• Air which is breathed out is exhaled to the atmosphere
not returning into the circuit.
• Defined as ‘ medium duration ‘ set
Standards & Guidance
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BS 4667 part 2
EN 137
Technical bulletin 1/97
OC notes 13/1
13/1/1 test procedures
13/1/12 cylinders
13/1/11 ADSU
CARBON COMPOSITE
CYLINDER
• 1800 ltr air
200 bar
3.9kg
• Seamless aluminium liner around with EPOXY
RESIN IMPREGNATED CARBON FIBRES
wound spirally to give approx 90% of its strength
over this a layer of RESIN IMPREGNATED
GLASS FIBRE + Carry case - Nomex
• Inside coated with corrosion inhibitor
• Painted GREY with BLACK/WHITE shoulders
Denoting BREATHABLE air
CARBON COMPOSITE
CYLINDER (Cont.)
LABEL
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Test Pressure 310 bar
Filling Pressure 207 bar
Water capacity 9 L
Serial number
Weight 3.9 kg
Thread ID M18
Design life cycle 15 yrs
Aluminium alloy of liner AA 6061
Specification HSC-AL-FW2
Manufacturers mark
Mark of approved inspection body
CYLINDER (cont.)
Charged with 1800 L air at 207 bar
FULL DURATION 45 MINS @ av. rate of
40 L Min. SAFETY MEASURE – Working
duration LIMITED to 35 mins. Leaving
safety margin of 10 mins.
Difficult / strenuous operations will use more
air, quicker
CYLINDER VALVE
• 3 inch anti debris tube – Minimises risk of dust/small
particles inside cylinder entering workings of cylinder
valve
• M18 Parallel threaded connection
• Chromium plated marine brass
• 3 turns to fully open hand wheel + black rubber cover
• Spring loaded ratchet to prevent accidental closure – 4
gland nuts
• Direct reading pressure gauge with POLYCARBONATE
GLASS marked in QUARTERLY’S – not considered
accurate as only in quarters
CYLINDER CONNECTOR
• CHROMIUM PLATED MARINE BRASS
• MALE THREAD
• SINTERED METAL FILTER ARRESTS
PARTICLES DOWN TO 50-60 MICRONS
• HIGH PRESSURE HOSE CONNECTION
INCORPORATES 20-32 LPM
RESTRICTOR
PRESSURE REGULATOR
• Chromium plated marine
brass
• Can deliver up to 1500
LPM – balanced piston
type on knife edge seal
• Divided into PRIMARY /
SECONDARY Chambers
• Pressure relief valve
operates between15-17
BAR
• Working pressure 7.5
BAR
• Static pressure 10.5 BAR
HOSES
PRIMARY - HIGH PRESSURE w/p 300 bar, t/p 600 bar, b/p 1400 bar
Construction :
TEFLON INNER
STAINLESS STEEL BRAIDED OUTER SHEATH
COVERED IN HYTREL ANTI STATIC OUTER SHEATH
SECONDARY - LOW PRESSURE BREATHING HOSE
w/p 18 bar, t/p 36 bar , b/p 72 bar
Construction :
TEFLON INNER
SPIRALLY WOUND FIBRE REINFORCEMENT
CHEMICALLY BONDED WITH ANTI STATIC OUTER SHEATH.
* Pin prick at end – Safety feature
WHISTLE UNIT
• Chrome plated brass
• Operates between 50-60
bar when SAFETY
MARGIN is reached
• Uses up to 5 lpm –
normally no more than 2
lpm from cylinder
• MUST keep sounding
down to zero
• 90 db at 1 metre
HIGH PRESSURE GAUGE
• Gives direct pressure
reading
• Calibrated in 10 bar
segments up to 350 bar
• Bourdon tube principle
• Shatterproof plastic cover
• Blow out disc on reverse
• Protected by rubber cover
• Gauge needle markings
are fluorescent
• Black strip from 0-60 Bar
BREATHING HOSE
Secondary hose leads to a ‘T’ piece
Connection – female EURO COUPLING
QUICK COUPLING CONNECTOR
Used to connect air lines during
decontamination procedures
BREATHING VALVE
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Made of Reinforced plastic - Vistamid
Positive pressure attachment
Supplementary air supply
Breathing Valve consists of:
1. Valve cone & spring assembly
2. Lever fork & rod
3. Positive pressure & diaphragm assembly
4. Supplementary air supply – 300 LPM
FACE MASK BS136
• 60% Natural rubber – NON DERMATITIC
• POLYCARBONATE VISOR FPC – IS REPLACEABLE
• INNER ORANASAL MASK with NON-RETURN VALVES
to ELIMINATE DEAD SPACE – INHALED / EXHALED
AIR WILL NEVER BE MIXED
• 5 piece spider harness with stainless steel fixings
• Reflex seal with positive pressure in mask sealing
against your face – wide sealing edge/inverted seal
• SPEECH DIAPHRAGM cover attached by 2 screws, fits
over breathing valve PREVENTING breathing valve
being removed
CARRY FRAME
• ‘Q’ BACKPLATE
• ANATOMICALLY DESIGNED MOULDED
BACKPLATE TO DISTRIBUTE WEIGHT
EVENLY ACROSS BACK AND HIPS
• MADE OF THERMO PLASTIC VISTAFLEX
• ANTI STATIC COATING
• CYLINDER STRAP ASSEMBLY WITH ‘OFF
SET’ CAM
• Can be ‘Twinned’ – Red stitching
HARNESS
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CONSISTS OF 2 PIECES :
SHOULDER STRAPS
WAIST BELT
NYLON WEBBING SHOULDER
STRAPS WITH COMFORT PADS
STAINLESS STEEL BUCKLES
ADJUSTABLE HIP BELT ASSEMBLY
ANCILLARY EQUIPMENT
ADSU
• DSX 1000 MKII DISTRESS SIGNAL UNIT
• Can be AUTOMATICALLY or MANUALLY
Operated to give AUDIBLE WARNING if wearer
becomes DISTRESSED for any reason
• Manually operated evacuation and duration
timer
• Special key used to turn on/off
• Any repairs carried out by Brigade BA technician
or other designated personnel.
• Intrinsically safe
DSX 1000 MKII SPECIFICATION
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Frequency range 2.7Khz-3.0 Khz
Location flash – 1 flash every 1 second alternating sides and front
Movement monitor period – 30 SECONDS
Pre alarm – 10 Secs @ 80db
Battery – Duracell MN 1604 or as detailed on reverse of unit
Auto rest indicator – Amber L.E.D. 1 sec flash on reset
Full alarm sound – 90-96 db @ 2 m in free air
BA duration timer – at 15 mins then every 5 mins
Evacuation whistle – 3 blasts every 20 secs.
Size – 119.5 x 87 x 39 mm, Weight 300 g
Low battery indicator – 1 sec audio tone and red L.E.D. every 2
secs.
BA TALLY
• YELLOW COLOUR – OPEN CIRCUIT
• CONTAINS SAFETY CRITICAL INFO
SUCH AS WEARERS NAME, RANK,
BRIGADE NUMBER, BA SET NUMBER,
STATION, CYLINDER PRESSURE,
CAPACITY AND DOSIMETER
READINGS ON BACK
PERSONAL LINE
• 6 m Long
• CARABENA on one end secured to set at
the other end - belt
• ‘D’ Ring attached with TENNEX clip 1.25
m from running end to allow use of short
personal line when guidelines in use
• 4 mm No 2 plaited polyester
TORCH
• INTRINSICALLY SAFE – Wont create a
spark in hazardous conditions
• Marked INTRINSICALLY SAFE on unit
• Used to charge the PHOTO
LUMINESCENT gauge
• Batteries to be changed ONLY by trained
technician
• Spare bulb contained in unit
FLOW OF AIR
• As the hand wheel is
turned the valve stem is
also turned- this in turn
opens the valve slug.
• Air enters from the
cylinder into the valve
through the debris tube.
• From here the air moves
through the outlet tubes
of the cylinder valve and
out through the regulator
connection and into the
regulator unit.
PRESSURE REGULATOR
• Air enters the regulator
primary chamber from the
cylinder connection
• Air can then travel in 2
directions;
• 1 – Through primary
chamber and onto the
gauge via the restrictor or
• 2 – Through the central
bore of the hollow piston
and into the secondary
chamber and then up to
the breathing valve
Pressure regulator cont.
• With the action of the air
changing direction and
expanding into the larger
secondary chamber the
pressure reduces to the
dynamic working pressure of
7.5 Bar
• Whilst air is not being used, a
back pressure builds up in the
secondary chamber.
• This acts against the face of
the piston forcing it back down
on the knife edge seal
overcoming the pressure of the
spring at 10.5 Bar.
Pressure regulator cont.
• As the air is used, the back
pressure decays, the
secondary spring asserts itself,
lifting the piston from the valve
thus allowing the cycle to be
repeated.
• In the side of the regulator a
spring loaded relief valve is
fitted. Its purpose being to
protect the low pressure hose
if the main valve is open and
the breathing valve is
disconnected from the
manifold. The relief valve will
operate between 15-17 Bar.
Warning whistle unit
• Fitted to the pressure
gauge manifold block
situated on the left
shoulder close to the ear
and operates at between
60 and 50 Bar.
• Air consumption is up to
but not exceeding 5 l/min.
• Operates by means of a
system of pistons and
springs.
• Bourdon tube style gauge
Bourdon tube gauge
• Made of Phosphor bronze.
• Consists of tube, oval in
section, sealed at one end
formed in shape of the greater
part of the circumference of a
circle. When pressure applied
internally tube straightens –
when air exhausted tends to
curl up.
• Amount of curvature approx.
proportional to pressure or
vacuum applied
• Simple linkage at free end
transmits it to pointer moving
over suitably graduated dial.
Cut away view of warning whistle
Warning whistle unit
• As the cylinder valve is
opened the whistle
sounds momentarily until
the spring on the
pressure sensor piston is
overcome and the airway
is closed.
• When the cylinder
contents reach between
60-50 Bar the pressure
sensor will re-assert itself,
opening the airway
allowing air to pass.
Warning whistle unit
• The back pressure is built
up between the whistle
nozzle and the head of
the regulating piston
which cause the 2 pistons
to work together to
regulate the flow of air.
• When the cylinder is fully
exhausted both pistons
will have travelled to their
fullest extent.
BREATHING VALVE
• Air from the gauge
manifold flows through
the breathing hose to the
breathing valve.
• The flow of air is now
held in check as a result
of the valve cone being
pushed onto the the valve
inlet by means of a spring
• Automatic pressure relief
valve 12-17 bar
BREATHING VALVE Inhalation
1. Wearer inhales and a
reduction of pressure
occurs in the diaphragm
assembly, allowing the
positive pressure spring
to push the diaphragm
assembly forward.
2. The assembly now
comes into contact with
the lever fork and the
lever fork pivots, pulling
on the rod.
BREATHING VALVE Inhalation
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The rod is connected to the
sealing piston assembly
which now lifts the valve
cone off the inlet allowing air
to flow into the mask.
Air flows up through the
demister ports over the
inside of the visor, preventing
any condensation forming
and on through the nonreturn valves into the inner
oranasal mask and into the
wearers lungs.
The only outlets from the
mask are the wearers lungs
and the exhalation valve in
the diaphragm assembly.
BREATHING VALVE Exhalation
• Wearer now exhales
increasing the pressure of
the diaphragm assembly.
• This has already been
extended as far as it can
by the positive pressure.
• The exhalation valve
opens putting pressure
on the sealing disc which
opens allowing the
wearer’s exhaled breath
to escape from the valve
STANDARD TESTS
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…..ensure that the set is functioning properly
If set fails any, then its made defective and taken off the runImpounded/Distress to wearer procedure Appendix 6 OC 13/1. RIDDOR
3 main types of test in Bucks - ROUTINE,MONTHLY & ANNUAL
Routine tests
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Consists of leakage/function tests+ visual checks for damage & wear
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Check positive pressure switch opens on first breath
Check mask has a positive pressure
Pressure gauge shouldn’t rise or fall more than 10 bar in 1 minute when
cylinder valve turned off then on again
Warning whistle sounds at 50-60 bar
Check and record cylinder contents
Check ancillary equipment
Complete log book
MONTHLY TEST
• Set subjected to periodic wear of not less than
minimum wearing duration of 50 Bars
• However, if set has been worn for drill or incident
for at least 50 bars then an asterisk should be
entered in column 4 ( OTHER TEST ) in log
book, to indicate that the ‘WEAR DOWN’ test will
not be required for that month
• Cylinders Physically examined every 6 months
on station.
MONTHLY TEST
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SUFFICIENT AIRFLOW
LOW EXHALATION RESISTANCE
LEAKAGE TEST
SEALING TEST
AUTOMATIC POSITIVE PRESSURE
OPERATION
RECORD ‘MINI TEST’ IN SET LOG BOOK
ANNUAL TEST
• To be carried out by
Workshops ONLY
• Notated in log book in red
ink
• Cylinders sent away every 3
years for inspection
The end