MSA FireHawk M7, Инструкция по эксплуатации и руководство пользователя, Страница: 5 / 56

DESCRIPTION
DESCRIPTION
FireHawk M7 Air Masks from MSA are pressure-demand,
self-contained 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)].
The FireHawk M7 Air Mask consists of the following
components.
• PR14™ First Stage Regulator
• Firehawk Second Stage Regulator
• Cylinder and Valve Assembly
• Audi-Larm™ Audible Alarm with URC Assembly
• FireHawk M7 Carrier and Harness Assembly
• Ultra Elite ® Facepiece
• FireHawk M7 HUD or I-HUD
• FireHawk M7 Control Module (integrated PASS version)
• FireHawk M7 Power Module (integrated PASS version)
• NightFighter HUD Transmitter (without integrated
PASS version)
Optional FIREHAWK M7 AIR MASK COMPONENTS
• ClearCommand ® Communications System
• Ultra Elite XT Communications System
• FireHawk M7 Telemetry Module
• ExtendAire System
• ExtendAire II System
• Quick-Fill System
• Rescue Belt
FIREHAWK M7 AIR MASK COMPONENTS
PR14 FIRST STAGE REGULATOR
The PR14 First Stage Regulator reduces the pressure
from the cylinder and valve assembly to an intermediate
pressure, which is in turn further reduced by the Firehawk
Second Stage Regulator to a pressure that is respirable
by the user.
The PR14 First Stage Regulator incorporates a down-
stream design and dual springs.
The regulator incorporates a large, easily replaceable, sin-
tered filter to capture particulates that may be in the air
stream.
FIREHAWK SECOND STAGE REGULATOR
The Firehawk Regulator is a pressure-demand regulator,
which maintains a positive pressure in the facepiece while
the air mask is in use.
The Firehawk Regulator attaches to the facepiece via a
slide-to-connect or a push-to-connect feature.
The Firehawk Regulator has two available covers, purge
and hard cover. The purge cover offers the user the ability
to manually activate the regulator or to provide a quick
burst of air during use without using the bypass knob.
There are also two types of Firehawk Regulator intermedi-
ate pressure hose connections, threaded and quick-con-
nect.
CYLINDER AND VALVE ASSEMBLY
*as approved by NIOSH
The cylinder valve includes a metal valve body, threaded
connection for filling and attachment of the Audi-Larm
Alarm, handwheel, safety disc (burst disc), and pressure
gauge.
The pressure gauge continuously shows the air pressure
in the cylinder.
The handwheel is used to open and close the cylinder
valve.
AUDI-LARM ALARM WITH URC ASSEMBLY
The Audi-Larm Alarm rings when there is approximately
25% of the air mask’s rated service time remaining and
when the cylinder valve is first opened, providing an audi-
ble indication that the alarm is working properly.
A high pressure hose delivers air at cylinder pressure from
the Audi-Larm Alarm to the PR14 First Stage Regulator.
5 TAL 1705 (L) Rev. 18 - 10082858
Capacity Pressure Rated Svc*
Cubic Ft. psig Life (Min.)
45 4500 30
88 4500 60
45 2216 30
45 2216 30
60 3000 30
66 4500 45