A fire sprinkler is the part of that discharges water when the effects of a fire have been detected,
such as when a predetermined temperature has been reached.
Automatic fire sprinklers operate at a predetermined temperature, utilizing a fusible link, a portion of
which melts, or a frangible glass bulb containing liquid which breaks, allowing the plug in the orifice to
be pushed out of the orifice by the water pressure in the fire sprinkler piping, resulting in water flow
from the orifice. The water stream impacts a deflector, which produces a specific spray pattern
designed in support of the goals of the sprinkler type (i.e., control or suppression). Modern sprinkler
heads are designed to direct a spray downward. Each individual automatic fire sprinkler operates
individually in a fire. Contrary to as often shown in movies, the entire sprinkler system does not
activate, unless the system is a special deluge type.
Open orifice sprinklers are only used in water spray systems or deluge sprinklers systems. They are
identical to the automatic sprinkler on which they are based, with the heat sensitive operating element
Automatic fire sprinklers utilizing frangible bulbs follow a standardized color coding convention
indicating their operating temperature. Activation temperatures correspond to the type of hazard against
which the sprinkler system protects. Residential occupancies are provided with a special type of fast
response sprinkler with the unique goal of life safety.
Sprinkler System Benefits
Fire sprinklers are most effective during the fire's initial flame growth stage. A properly selected
sprinkler will detect the fire's heat, initiate alarm and begin suppression within moments after flames
appear. In most instances sprinklers will control fire advancement within a few minutes of their
activation. This will in turn result in significantly less damage than otherwise would happen without
Sprinkler systems offer several benefits to building owners, operators, and occupants. These benefits
Immediate identification and control of a developing fire
Sprinkler systems respond at all times, including periods of low occupancy. Control is generally
In conjunction with the building fire alarm system, automatic sprinkler systems will notify
occupants and emergency response personnel of the developing fire.
Reduced heat and smoke damage
Significantly less heat and smoke will be generated when the fire is extinguished at an early
Enhanced life safety
Staff, visitors and fire fighters will be subject to less danger when fire growth is checked.
Egress route and fire/smoke barrier placement becomes less restrictive since early fire control
minimizes demand on these systems. Greater utilization of exhibition and assembly spaces is
usually a benefit.
A sprinkler controlled fire decreases demand on security forces, minimizing intrusion
Decreased insurance expenditure
Sprinkler controlled fires are less damaging than fires in non-sprinklered buildings. This results
in lower insurance eimbursements. Insurance underwriters will usually offer reduced premiums
in sprinkler protected properties which can save a large amount of capital. This is especially
important when funds are limited
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