Nozzle Air Entrainment - Video Series

Today we have released the beginning of a 7 part video series on Nozzle Air Entrainment. These videos will walk through some of the basic concepts of nozzle air entrainment and how you can deliver some hands-on practical drills demonstrating air entrainment with various nozzle types. We will release all of these videos over the next few weeks so keep an eye out as we move along. You will see below Test 1 and 2 which will begin our video series.

TEST 1

Test 1 is an exterior attack through a window using a fog nozzle. We will begin the attack with a straight stream directed at the ceiling and then move the pattern through 30 degrees and towards full fog. You will see a drastic increase in air entrainment as we change the pattern of the nozzle. This fog nozzle was flowing 125 GPM at 100 psi nozzle pressure.

https://www.youtube.com/watch?v=k1xpO9Es2nY

Test 2

Test 2 is the same test but we are using a 7/8" smoothbore nozzle. You will see a decrease in the air entrainment even with the increase in flow. This 7/8" tip was flowing 160 GPM at 50 psi nozzle pressure.

https://www.youtube.com/watch?v=EOmyrJEpIZw

You will see several more of these tests coming out over the next few weeks. The next tests include interior attacks both ventilated and non ventilated.

If you would like to view all of the videos in the video series you can see them below in our playlist:

Entire Nozzle Air Entrainment Playlist

https://www.youtube.com/playlist?list=PL4NKqZJ7joymMNcArOH8teKL_c2u6X3KJ

Nozzle Series - Automatic Nozzles

We are continuing our Nozzle Series with Automatic Nozzles. The Automatic Nozzle was originally designed on a napkin and since then has been widely used throughout the country. The goal of the automatic nozzle is to provide relatively consistent nozzle pressure throughout a wide range of flows. So, you will see automatic nozzles used in many different applications including foam operations and standpipe operations. You need to thoroughly evaluate the use of an automatic nozzle in certain applications prior to using them. While the nozzle can offer several advantages like the ability to provide the pump operator with an in-line pressure regulator it can also conceal hidden flow issues because of the nozzles abilities to maintain good nozzle pressure. Adequate nozzle pressure does not necessarily equate to adequate nozzle flow. When a hose line is kinked or something happens to inhibit the amount of water moving through the line you will see no major indications on the nozzle except for a drop in nozzle reaction. You need to get out and flow these nozzles to feel the difference in adequate flow and poor flow. Check out the video below for an overview of the Automatic Nozzle: https://www.youtube.com/watch?v=pzYmWeUPruk

Nozzle Series - Adjustable Fog Nozzles

The adjustable fog nozzle is a very popular type of nozzle seen on many apparatus. You will see this type of nozzle used in a wide variety of applications. The adjustable gallonage nozzle offers a lot of versatility because of it's ability to not only change patterns but also to increase and decrease the flow through the nozzle. However, it is very important for firefighters to understand that turning the gallonage adjustment does not necessarily equate to flowing what the actual setting is showing. As you turn the gallonage adjustment on this type of nozzle you are essentially making the orifice larger or smaller and as this adjustment is made the pump operator must compensate on the pump panel to deliver the appropriate nozzle pressure in order to flow the selected gallonage. This nozzle can offer advantages and disadvantages including the flexibility of adjusting the flow but disadvantages like the potential for accidental flow decrease if you bump the gallonage adjustment in the dark or smoke. Take a look at the video below covering Adjustable Gallonage Fog Nozzles:

https://www.youtube.com/watch?v=vS3m5B8Bh9E

Nozzle Series - Fixed Flow Fog Nozzles

Fixed flow fog nozzles are a very popular type of nozzle seen all over the country. The nozzle offers several advantages including an adjustable pattern and simplicity of pump operations. You can find fixed flow fog nozzles in several different configurations. You will commonly see this type of nozzle offered in there different pressures; 100 psi, 75 psi and 50 psi. You will also see this type of nozzle offered in a breakaway version which is fairly popular for high-rise and hose packs. You will see many break away versions of this nozzle with a smoothbore integrated into the breakaway. Take a look at the video below for an overview of the Fixed Flow Fog Nozzle:

https://youtu.be/xfMI7rB-r9o

Nozzle Series - Smoothbores

The Smoothbore Nozzle

We are continuing our video series on nozzles with the Smoothbore. This nozzle remains a powerhouse in the American Fire Service. With the increase in heat release rates due to changes in products and materials our ability to throw serious water on the fire is of the utmost importance. The smoothbore nozzle offers several advantages for firefighters. Some of strongest advantages come with the simplistic design of the nozzle. The smoothbore has the ability to perform under extreme conditions with good flow at a low nozzle reaction. The nozzle is very difficult to clog with debris and if a hose line becomes kinked it will maintain fairly good flow compared to a high pressure fog nozzle (100 psi). Even though the fog/combination nozzle has the ability to absorb more heat energy at the same flow, the smoothbore has the ability to penetrate without steaming off when attacking the fire. Once the stream enters the room on fire we can bounce the stream off of walls and ceilings to break up the stream and increase its heat absorption capabilities. The video below will provide you with an overview of the smoothbore nozzle and will cover a few topics in detail.

https://www.youtube.com/watch?v=tgzHmYZ3BUo

Nozzle Video Series

Check out our newest firefighter training video series. We have produced a five part nozzle video series covering several common types of nozzles. In this first video we will provide an overview of nozzle types and discuss some of the advantages and disadvantages of the nozzles. In the coming videos we will be taking each nozzle type and discussing them in detail. https://www.youtube.com/watch?v=VVexyIWX2bI