Solid Stream Nozzles

Replies to This Discussion

Permalink Reply by Brandon Krause on January 16, 2010 at 4:54pm

We did some testing with both SB and fog nozzles. We found that the SBs were right on with the flow, but the fogs were off, by as much as 30gpm on some, for what they were supposed to flow. Also something to remember is that when looking for your optimal flow, each size hose will only flow a certian amount of water no matter how much pressure is behind it!

Permalink Reply by Larry Glover on January 16, 2010 at 9:56pm

What pressure did you pump your fog's? We pump ours at 130 psi for 1 3/4" & our 2 1/2" (with fog and both are 200'). Would like to know what you guys came up with. Thanks and Stay Safe!

Larry

Brandon Krause said:

We did some testing with both SB and fog nozzles. We found that the SBs were right on with the flow, but the fogs were off, by as much as 30gpm on some, for what they were supposed to flow. Also something to remember is that when looking for your optimal flow, each size hose will only flow a certian amount of water no matter how much pressure is behind it!

Permalink Reply by Antiquefirelt on January 17, 2010 at 8:43am

Larry Glover said:

What pressure did you pump your fog's? We pump ours at 130 psi for 1 3/4" & our 2 1/2" (with fog and both are 200'). Would like to know what you guys came up with. Thanks and Stay Safe!

Larry

130 psi for 200 ft of 1.75"? What type of fog nozzles? 50 , 75 or standard 100 psi nozzle pressures?

Permalink Reply by Brandon Krause on January 17, 2010 at 8:58am

We used a chart so that we could be as accurate to the manufact. specs as possible. You can find the chart at TFTs website. For the selectable gallonage we just pumped to maintain 100psi at the nozzle. FYI for one of the evolutions we were pumping the truck at 190psi per the chart to obtain the correct flow, didnt work but took a few guys to man the nozzle.

Larry Glover said:

What pressure did you pump your fog's? We pump ours at 130 psi for 1 3/4" & our 2 1/2" (with fog and both are 200'). Would like to know what you guys came up with. Thanks and Stay Safe!

Larry

Brandon Krause said:

We did some testing with both SB and fog nozzles. We found that the SBs were right on with the flow, but the fogs were off, by as much as 30gpm on some, for what they were supposed to flow. Also something to remember is that when looking for your optimal flow, each size hose will only flow a certian amount of water no matter how much pressure is behind it!

Permalink Reply by Larry Glover on January 17, 2010 at 4:59pm

We use the 100 psi Akron TurboJet 200 gpm's. Our policy states that we pump at 130 psi pdp--I don't like it.

Adam Miceli said:

Larry Glover said:

What pressure did you pump your fog's? We pump ours at 130 psi for 1 3/4" & our 2 1/2" (with fog and both are 200'). Would like to know what you guys came up with. Thanks and Stay Safe!

Larry

130 psi for 200 ft of 1.75"? What type of fog nozzles? 50 , 75 or standard 100 psi nozzle pressures?

Permalink Reply by Russ Chapman on January 17, 2010 at 5:50pm

Bro
Let me tell you that if your TFTs are more than 10 years old, they are NOT putting out what you think. I recently did a test. Digital flow meters, inline guages, the whole works. I am not going to bore you with how it was set up, but we pumped a series of TFTs (200 feet 1 3/4") at 150 psi. The first time the line was charged and nozzle open, we got about 170 gpm. Then we shut down the line at the pump. We recharged it, again at 150 psi, and the nozzle open, (same nozzle team, same hose) and got 125 gpm. We did this same procedure numorous times. We even changed nozzles (HF-TFTs all the time) and we got various flows, including one time as low as 106 gpm. Now I started thinking it was the flow meter. I recalibrated it. Same stuff! Then to prove my point, I put on 1400 series Akron SB nozzle, and pumped it at 130 psi, (20 psi/length, 50 psi NP) and got about 185 gpm each time. We repeated the same procedures just like the automatic. There was no change. The TFT rep was called, and when the weather changes, he is coming in from Indiana to run the tests with us. He even stated the nozzles need to go back to the factory for periodic tune ups. This is why Akron NO LONGER makes any automatic nozzles. Be safe Bros, because with an automatic, it looks great, but like Forest's Mom said "life (read: automatic nozzles) are like a box of chocolates, you never know what cha goin to get"!!!!!!

Brandon Krause said:

We used a chart so that we could be as accurate to the manufact. specs as possible. You can find the chart at TFTs website. For the selectable gallonage we just pumped to maintain 100psi at the nozzle. FYI for one of the evolutions we were pumping the truck at 190psi per the chart to obtain the correct flow, didnt work but took a few guys to man the nozzle.

Larry Glover said:

What pressure did you pump your fog's? We pump ours at 130 psi for 1 3/4" & our 2 1/2" (with fog and both are 200'). Would like to know what you guys came up with. Thanks and Stay Safe!

Larry

Brandon Krause said:

We did some testing with both SB and fog nozzles. We found that the SBs were right on with the flow, but the fogs were off, by as much as 30gpm on some, for what they were supposed to flow. Also something to remember is that when looking for your optimal flow, each size hose will only flow a certian amount of water no matter how much pressure is behind it!

Permalink Reply by Larry Glover on January 17, 2010 at 8:46pm

Thanks for the info Russ. I should have put in there, that they are adjustable gallonage nozzles. I set mine on 200 gpm's when I'm driving. I really would love to do some flow testing with our nozzles and the "predetermined" pdp's that we use to see what we really get. Thanks for the info Brother. Stay Safe.

Larry

Permalink Reply by Dave Stacy on January 18, 2010 at 8:21am

1" tip on 200' 1.75"
1 1/16" tip on 250' 2"
1 1/4" tip on 200' 2.5"
1 1/16" tip on 250' 2.5" to 150' 2" line (400')

Permalink Reply by Russ Chapman on January 18, 2010 at 5:39pm

Brother
Check this article out. I am an adjucnt instructor for the Connecticut Fire Adademy, Cadre leader of the Engine Company stuff. We lay this out for classes I teach. It is an eye opener, and has sold many a fire chief that thier Automatics are not what they think they are, or that we are overpumping fog nozzles. Hope this helps.

http://www.fireengineering.com/index/articles/display/274183/articl...





Larry Glover said:

Thanks for the info Russ. I should have put in there, that they are adjustable gallonage nozzles. I set mine on 200 gpm's when I'm driving. I really would love to do some flow testing with our nozzles and the "predetermined" pdp's that we use to see what we really get. Thanks for the info Brother. Stay Safe.

Larry

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