Presentation on theme: "Blitzfire Deck Gun Ground Monitor. Cooling (Absorbing the heat from a fire) Smothering (Diluting or excluding Oxygen)"— Presentation transcript:
Blitzfire Deck Gun Ground Monitor
Cooling (Absorbing the heat from a fire) Smothering (Diluting or excluding Oxygen)
When heated to its boiling point, Water absorbs heat by converting into the gas phase called water vapor or steam (vaporization) Latent heat of Vaporization ◦ The energy required to change a substance from a liquid to a gas phase. ◦ This is how water absorbs heat from a fire. ◦ Water uses the fire’s heat energy to change water into steam
Evaporation requires heat energy that comes from the nearest available heat source. This heat energy is known as the “latent heat of vaporization,” and its removal cools the source it comes from. An example is the cooling of your body by evaporation of perspiration.
Water expands to 1,700 times its original volume when converted to steam at 212 degrees Farenheit
Dilutes or excludes oxygen from the fire Steam expansion can displace hot smoke and other products of combustion May smother fire by excluding oxygen Water absorbs the heat using Latent Heat of Vaporization, creating steam and cooling fuel below ignition temperatures. Within a compartment, the steam created can displace the oxygen.
The efficiency in which a fire stream absorbs heat is largely dependant on the surface area of the water introduced into the heated environment This is demonstrated by the use of a fog nozzle or a solid stream, or a hand line vs. a master stream…
A solid stream is more compact Fog has more surface area If you have a large fire with high heat, a fog nozzle on a hand-line may not be able to penetrate to the seat of the fire and might evaporate before reaching the heated fuel and the hot seat of the fire… A Master Stream might do it!
According to Essentials of Firefighting 5 th Addition, a Master Stream discharges more than 350 GPM and is fed by 2 ½ or 3 inch hose-lines or large diameter hoses connected to a Master Stream nozzle. Master Streams are large volume fire streams.
To reset the flow simply open the valve to any of six detent flow positions with the turbulence-free slide valve. The Blitzfire's discharge pivots make directing the stream extremely quick and effortless. A unique up/down pivot on the hose inlet allows the monitor to have stability even on porches, stair landings or the like. The Blitzfire is a simple, light, and highly maneuverable attack monitor. The Blitzfire's low elevation angle makes it suitable for use indoors. It can go anywhere a handline goes while delivering far more water. If the Blitzfire starts to slide or lift the SAFETY SHUT-OFF VALVE automatically shuts off the flow of water. This safety feature reduces the risk of injury from an out-of-control appliance. The shut- off slows near stroke end to eliminate water hammer.
Release strap from housing Depress release mechanism
Blitzfire is pre-connected with 50 ft down, and 100 up for a total of a150 ft deployment
Stabilizer arms must be folded out
FOG Nozzle ◦ The Blitzfire has a fog nozzle that is kept in the pump operators compartment… Solid Stream Nozzle ◦ You can increase or decrease flow (GPM) by Changing out the tips on the solid stream nozzle. Fog Nozzle 1” tip 1 ¼” tip 1 ½” tip
Pull handle back to operate BLITZFIRE The nozzle swivels and allows it to be pointed in any direction. It will stay there on its own and allows for the Blitzfire to be left unattended Unlock pin before pulling handle back
Removable tips to increase or decrease flow
Smaller Diameter Tip ◦ More Pressure … Less Flow Bigger Diameter Tip ◦ Less Pressure… More Flow
All of our Engines are different. On 2805 there is no spot to open up the deck gun from the pump panel. It is connected directly to the pump. A firefighter has to climb up and manually open a valve. When using 2805’s Deck Gun as a Ground Monitor, it must be opened and controlled from the pump. On 2808, the Deck Gun must be activated from the pump panel. This is true even when it is being used as a ground monitor.
The only way to really understand is to operate this equipment. Come in to the station and ask questions.
Once the pump operator opens the valve to the deck gun, it will shoot water on Engine 2808.
Crank handle moves tip up and down. Side to side movement is achieved by simply swiveling the deck gun in its housing Up and down movement is chain driven on You can see the plastic chain guard here.
Every Turret or Deck Gun that we have comes off in a different way. Get down to the station and learn how to do it.
Pretzel style layout on ground provides stability Monitors have a chain that needs to be connected to front of Pretzel lay Ground Monitors are fed by two 2 ½ “ inch hoses Stabilizer Arms are deployed
Bases for Ground monitors are located on top of the engine next to the deck Gun Pin must not be pulled when operating as a ground monitor