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Getting Back to Basics: Nozzles & Hose Streams
I would like to start this off by looking at this picture and what I would like for everyone to do is tell me everything you see on what is being done wrong or right and what is missing and needs to be added. And as we go along we will get into Different types of nozzles some that are old and some that are new, and if anyone has some insight for the rookies in here please share. Remember Knowledge is power, and with that knowledge it keeps you and everyone else safe.
Replies to This Discussion
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Permalink Reply by CHIEF NORMAN on
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As you can see in both of these pictures these fireman are in a stationary mode, now both nozzle set-up's can be maned by one person but only if you pay close attention to how the hose and nozzle are set up...Most generally you large diameter hose is used in this position say for instance 2-1/2 and above for fire suppression. In long durations even with a 1-1/2 or 1-3/4 this can take allot of strain off the fire fighter plus free up a man...
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Can anyone tell me what type of nozzle this guy is holding and the purpose of this nozzle?
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Permalink Reply by Jack/dt on
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Piercing nozzle, can be driven through walls, floors, roof, vehicle hood/roof/trunk/door, even concrete block walls. Haven't used one, we do have one and I'd keep it mind for those nasty basement fires.
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Good job Jack, your right a Piercing nozzle and thanks for the detail on what it should be used for...
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Great job chief...Thanks brother...
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These are a few pictures to give you an idea of the piercing nozzle and what it is capable of doing.
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Permalink Reply by Paul Montpetit on
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OK...Lets see...Get back...!!! You are too damn close for what you have....Where the heck is your SCBA...??? Partner could help a bit with that handline... Get your butt down...unless you like the extra heat and smoke you are eating...Can you attack this from a better angle...Like upwind..? Is that a fog pattern or are you getting some water to the seat of the fire..? Paul
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Permalink Reply by Loyd Dittfurth on
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after all those and you dont have the cellar nozzle or the wall of water nozzle (dont remember what its called)
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The difference between the two types of nozzles is an automatic nozzle varies flow through a specified range using a variable orifice controlled by a spring to maintain nozzle pressure in a narrow range. For example, a nozzle that has a flow range of 70 gallons a minute to 200 gallons a minute. At 70 gallons a minute the nozzle pressure is approximately 80 to 85 psi. As the flow increases towards the upper end of the flow range, the orifice size becomes larger and therefore the pressure increases. The apparatus operator determines the maximum flow rate by setting the line pressure at the pump. The nozzle operator can achieve that flow rate by opening or closing his ball shut off. On the other hand the adjustable gallonage nozzle has a variable flow in increments and adjusted by the nozzle man. The adjustable nozzle also has a variable size orifice and that is what is being adjusted by the nozzle man. When the apparatus operator is pumping the line for maximum desired flow it allows the firefighter to adjust just how much water is needed to suppress the fire. One advantage of using an adjustable gallonage nozzle is that the lower flow rate used mostly for gas cooling at high nozzle pressures produces extremely small droplets which are highly efficient at absorbing energy in the hot gas layer. On the down side a variable or adjustable nozzle are slightly more complex to operate as there is a separate control for flow rate.
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In this video you can see the fire fighter showing the operation of the basement or cellar nozzle
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Permalink Reply by James Hawk on
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accountability tags could be on the front of their coat.
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