How Fire Extinguishers Work ??
-
Upload
ranjeet-kumar -
Category
Education
-
view
215 -
download
5
Transcript of How Fire Extinguishers Work ??
SELECTION & OPERATION
OF
FIRE EXTINGUISHERS
SUITABILITY OF EXTINGUISHING MEDIA
A-Class
Ordinary
Fire
B-Class
Liquid Fire
C-Class
Gas Fire
Electrical
Fire
Water Type
Ext
Foam Type Ext
DCP Type Ext
CO2 Type Ext
Clean Agent
Ext
SUITABILITY – OTHER CONSIDERATIONS
Energized Electrical Equipment – DCP or
CO2 of Clean Agent
Sensitive Electrical / Electronic /
Computerized Equipments – CO2 or Clean
Agent
Usage of DCP inside confined space reduces
visibility.
Before using CO2 or Clean Agent in confined
unventilated space, vacate the occupants.
FIRE EXTINGUISHERS
HOW THEY WORK ?
DCP (CARTRIDGE) TYPE EXTINGUISHER
Plunger is pushed inside.
CO2 cartridge seal is broken.
CO2 is released and flow is regulated by inner container.
Due to CO2 pressure, powder rises inside siphon tube.
DCP is discharged from tube.
Once activated, discharge can’t be stopped.
WATER (CARTRIDGE) TYPE EXTINGUISHER
Plunger is pushed inside.
CO2 cartridge seal is broken.
CO2 is released and flow is regulated by inner container.
Due to CO2 pressure, water rises inside siphon tube.
Water is discharged from Nozzle.
Once activated, discharge can’t be stopped.
IF OPERATED UPSIDE DOWN. . .
ABC (STORED PRESSURE) TYPE EXTINGUISHER
Contains advanced ABC Powder.
Discharge lever / squeeze grip is squeezed.
DCP rises inside siphon tube due to pressurized Nitrogen.
Powder is discharged from Nozzle/tube.
Pressure guage to check healthiness.
Discharge can be stopped by releasing squeeze grip.
CARBON DI-OXIDE (CO2) TYPE EXTINGUISHER
Rotate ball valve at the top
anti-clockwise.
Pressurized CO2 inside
cylinder rises inside siphon
tube.
CO2 gas is discharged
from Discharge Horn.
Discharge can be stopped
by rotating ball valve
clockwise.
MODULAR (ABC) AUTOMATIC EXTINGUISHER
Ceiling mounted extinguisher with bulb type sprinkler discharge head.
Pressure guage to check healthiness.
At 68°C, the sprinkler bulb bursts.
N2 gas acts as propellant and powder is discharged from sprinkler head.
Once activated, discharge can’t be stopped.
FM 200TOTAL FLOODING SYSTEM
FM-200 SYSTEM - ARCHITECTURE
FM-200 SYSTEM ACTUATION MECHANISM
FIRE SAFETY
CHECKLIST
CHECKLIST – HIGHRISE BUILDING
CHECKLIST – BRANCHES