75psi vs 50 psi fog nozzles?

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Permalink Reply by Larry Lasich on March 18, 2009 at 1:25pm

http://00691ee.netsolhost.com/index.htm

They just cost a fortune.

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Permalink Reply by Bob Franklin on March 20, 2009 at 12:27am

Hey Nate,
Several years ago I did a two year study in attack nozzles for our fire department.. We requested nozzles from every manufacture for a 6 moth trial period. We found that the Elkhart 4000-16 with a 150tip @ 50 psi nozzle pressure. The nozzle was flowing 146/154 gallons per minute. We can have a pump discharge pressure of 90 to 100 and produce a very effective fire stream with very little nozzle reaction. We are using 1-3/4 hose in 200 Ft. crosslay. We also use a 15/16 smoothbore on our aother crosslay which has worked out very well.

Hope it helps brother! Come see me at FDIC at LET'S TALK PUMPS
BOB

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Permalink Reply by Ricky Teter on March 20, 2009 at 8:31am

Do you guys have problems with hoselines kinking easily when pulling corners or advancing on stairs?

Bob Franklin said:

Hey Nate,
Several years ago I did a two year study in attack nozzles for our fire department.. We requested nozzles from every manufacture for a 6 moth trial period. We found that the Elkhart 4000-16 with a 150tip @ 50 psi nozzle pressure. The nozzle was flowing 146/154 gallons per minute. We can have a pump discharge pressure of 90 to 100 and produce a very effective fire stream with very little nozzle reaction. We are using 1-3/4 hose in 200 Ft. crosslay. We also use a 15/16 smoothbore on our aother crosslay which has worked out very well.

Hope it helps brother! Come see me at FDIC at LET'S TALK PUMPS
BOB

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Permalink Reply by Kevin Nowicki on March 20, 2009 at 8:48am

Nate,

It is very simple for me. Less pump discharge pressure, equals more line potential, equals greater fire flow potential, equals more efficient service. I could even make an argument it reduces wear and tear on the apparatus which is important to me since I look at the apparatus as a life support system for me and my guys. Save the truck, save a life!

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Permalink Reply by Adam Miceli on March 21, 2009 at 1:41pm

How about justification for the 1.75" fog nozzle? 50 psi SB equals cheap, simple, and least likely to fail.

The one point that makes sense to me, if looking at fog nozzles would be the "kink factor". The 75 psi will be more resistant to kinks but still less reaction force. Right is right, left for Lobster.

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Permalink Reply by Nate Brown on March 21, 2009 at 4:33pm

Thanks for the great feedback! I agree with the advantages of low nozzle reaction and less pump stress, but I don't believe it is worth taking a limp hose into a structure fire. I always tell my pump operators to add 10 to 15psi to avoid this because we currently have 50psi fog nozzles. Unfortunately we switched from 75psi fog nozzles several years ago so I have used them both and the advantages of a little less nozzle reaction and pump stress don't justify me and my crew going into a structure fire with a limp hose!

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