Achievements come to those who persevere, and a Firefighter
is the epitome of a go-getter. Amongst various Fire Safety & Fire Protection Equipment
that a fire warrior uses, SCBA serves as the major companion. A self-contained
breathing apparatus (SCBA) is a device worn by firefighters, and others to
provide breathable air in an immediately dangerous to life or health atmosphere.
The term self-contained means that the breathing set is not dependent on a
remote supply (e.g., through a long hose).
SCBA for modern firefighting subsumes a
Personal Alert Safety System or an Automatic Distress Signal Unit into their
design. These units generate specific high-pitched alarm tones to help locate
firefighters in distress by automatically activating if the movement is not
sensed, also allowing for manual activation as the need arise.
Customarily, an SCBA has three main components as a
high-pressure tank, a pressure regulator, and an inhalation connection
(mouthpiece, mouth mask or face mask), connected together and scaled to a
carrying frame.
SCBA typically may fall into two various categories. These
are:
1) Open circuit
2) Closed circuit
CLOSED
CIRCUIT
The closed-circuit type filters, supplements,
and re-circulates exhaled gas. It is used when a longer-duration supply of
breathing gas is needed, such as in long tunnels, and going through passages too narrow for a big
open-circuit air cylinder.
OPEN CIRCUIT
Open-circuit
industrial breathing sets are filled with filtered, compressed air, rather than
pure oxygen. An open-circuit rescue or firefighter SCBA has a full face mask, regulator, air
cylinder, cylinder pressure gauge, remote pressure gauge, and a harness with
adjustable shoulder straps and a waist belt which lets it be worn on the back.
Air
cylinders are made of aluminum steel or of a composite construction. The
composite cylinders are the lightest in weight and are therefore preferred by Safety
Equipment Association, but they also have
the shortest lifespan and must be taken out of service after 15 years. Air
cylinders must be hydrostatically tested every 5 years. During extended
operations, empty air cylinders can be quickly replaced with fresh ones and
then refilled from larger tanks in a cascade storage system or from an air
compressor brought to the scene.
Firefighters
are the real heroes who stake their own life for public safety. In the terms of
Safety apparatus, no compromise should be made. SOS truly takes care of its
employees in terms of safety provision.
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