MSA AirHawk MMR, Инструкция по эксплуатации и руководство пользователя, Страница: 5 / 24

DESCRIPTION
DESCRIPTION
The Air Masks from MSA are pressure-demand, self-con-
tained breathing apparatus (SCBA) certified by the
National Institute for Occupational Safety and Health
(NIOSH) for use in atmospheres immediately dangerous to
life or health:
``Immediately dangerous to life or health’’ means condi-
tions that pose an immediate threat to life or health or
conditions that pose an immediate threat of severe expo-
sure to contaminants, such as radioactive materials,
which are likely to have adverse cumulative or delayed
effects on health’’ [Title 42 CFR, Part 84.2, (Q)]
• This SCBA is not compliant with National Fire
Protection Association (NFPA) Standard 1981. The
SCBA should not be used for firefighting applica-
tions where NFPA compliance is required.
• This SCBA is not NIOSH approved for use against
CBRN live agents. If NIOSH CBRN Agent Approval
is required, use a NIOSH CBRN Agent approved
Firehawk Air Mask.
• This SCBA must be equipped with an Ultra Elite
Hycar facepiece (model numbers 7-935-7. 7-935-8,
and 7-935-9) and a CBRN regulator (model num-
bers 10060982 or 10060983) when exposure to
CBRN live agents is possible. Do NOT use a sili-
cone facepiece or a regulator that is not identified
as CBRN regulator against CBRN live agents.
Failure to follow these warnings can result in serious
personal injury or death.
AirHawk MMR breathing apparatus consists of the follow-
ing major sub-assemblies.
•
first stage regulator
• second stage regulator
• air cylinder and valve
• whistle audible alarm
• carrier and harness
• facepiece
FIRST STAGE REGULATOR
The first stage regulator is a "balanced-type’’ pressure
reducer that keeps the pressure to the mask mounted
regulator at approximately 80 psig throughout the entire
operating pressure range of the cylinder. The regulator has
a redundancy feature to minimize the possibility of a first
stage failure. The regulator uses a large sintered filter
which is easy to replace. The filter captures particulates
that may be in the air stream.
SECOND STAGE REGULATOR
This is a pressure-demand regulator, which keeps a posi-
tive pressure in the facepiece all the time. The release
button on top of the regulator stops air flow. To stop air-
flow, push the button in. To restart the regulator, inhale
sharply. The regulator attaches to the facepiece with a
Push-To-Connect connector or slide connector. The regu-
lator delivers large flow rates accurately and quickly.
Airhawk SCBA with the Firehawk MMR (model numbers
10060982and 10060983) are considered by MSA to be
“CBRN hardened.” They can be identified by Firehawk
Regulator model number and the CBRN marking on the
underside of the regulator housing. SCBA with these reg-
ulator models have passed CBRN live agent testing, but
are not CBRN-approved by NIOSH since they are not cer-
tified as NFPA compliant.
AIR CYLINDER AND VALVE
*as approved by NIOSH
The air cylinder and valve consists of a tank and a cylin-
der valve assembly. The cylinder valve includes a valve
body, cylinder valve inlet tube, handwheel, safety disc
(burst disc), and pressure gauge. The pressure gauge
shows the air pressure in the cylinder continuously. The
gauge is calibrated in 100 psig increments. For example,
a gauge reading of 20 is read as 20 x 100 or 2,000 psig. A
handwheel is used to open and close the cylinder valve.
WHISTLE AUDIBLE ALARM
The whistle audible alarm sounds when there is approxi-
mately 25% of the SCBA’s rated service time remaining.
The whistle also sounds when the cylinder valve is first
opened, providing an audible indication that the alarm is
functioning.
5 TAL 5010 (L) Rev. 3 - 10037469
Capacity Pressure Rated Svc*
Cubic Ft. psig Life (Min.)
45 2216 30
45 4500 30
66 4500 45
88 4500 60
Approx. Remaining
Cylinder Service Time
30-min. 2216 psig 7 min.
30-min. 4500 psig 7 min.
45-min. 4500 psig 11 min.
60-min. 4500 psig 14 min.