Fire Suppression Systems Flashcards
(8 cards)
How does Dry Chemical Powder work?
Suffocates the fire, cakes to the burning material, interrupting the chemical reaction
How does Foam work?
Suffocates the fire by blanketing the surface of the fire, cools the burning materials due to the water content. Foam systems can be either Loss of Pressure, or Rise of Pressure systems.
How does a Loss of Pressure (LOP) system work?
Systems hold constant nitrogen pressure throughout the detection system, this pressure holds the tank valve closed. When the detection tubing is burnt through, this pressure releases, the valve opens, and the agent is expelled through the distribution lines.
How does a Rise of Pressure (ROP) system work?
Systems run linear detector (FireWire) to detect fire, and utilise a solenoid to open the tank valves, to release the suppression agent.
What is a Liquid Vehicle Supression System (LVS)
Blanketing surface of the burning materials, suffocates fire, cooling due to the liquid nature and water content of the LVS.
A large benefit of LVS is that the suppression agent flows with liquid fuels, keeping that barrier on top of the fuel to ensure no oxygen or head are present to reignite the fire.
What is a Water Mist System?
Water mist systems, such as Fogmaker, use finely dispersed water droplets to extinguish or control fires. These systems are effective because the tiny droplets cool the fire, displace oxygen, and prevent flames from spreading.
What is a Gaseous System?
Gaseous fire suppression systems use various gases to extinguish fires, particularly in environments where water or other agents might cause damage. These systems are also known as “clean agent” systems because they leave minimal residue and are designed to rapidly suppress fire without water damage. They are commonly used to protect high-value assets, critical infrastructure, and sensitive equipment. On most mine sites in the Hunter Valley, you’ll find gaseous systems in switch rooms and draglines.
This system does not displace oxygen, instead uses gases for heat absorption
What is an Aerosol System?
Aerosol fire suppression systems are fire extinguishing systems that use a solid chemical to generate an aerosol, which then suppresses the fire by interrupting the chemical chain reaction in the flame.
