Pump Operator Training Series - Part 2 "Calculating Nozzle Flow"

[@JoseTorres-hd4lo]

I was just promoted to pumper engineer and after seeing your videos gave me the confidence in performing my duties and getting a better understand of the different components and responsibilty of the engineer. Thank you so much and STAY SAFE!

[@josepharaujo92]

Thank you for sharing your knowledge. Currently training to be an engineer on the Fire engine. These videos are helping me very much.

[@Boxalarmtraining]

Great to hear!

[@TheBluceRee]

GREAT class. Def gonna pass this test now.

[@CommonmanofIndia1947]

Hi Matt. I am an Fire Engineer from India. Thank u for sharing such info online.

[@Boxalarmtraining]

+Gourav Patidar Thank you very much. I enjoy hearing from firefighters around the world.

[@ratheshkumar8525]

Thanks Matt for sharing information

[@jonathanbosco8458]

Thanks Matt, nice to a hear an academic focused fire instructor

[@Boxalarmtraining]

jonathan bosco Thank you very much. Stay tuned for the next videos, they will go much more in-depth into friction loss and calculations.

[@FRIENDSofCAP]

QUESTION: At the part of the video where you are calculating GPM for the combination fog nozzle, which i s expected to run @ 100 PSI,, then if you are running at the lower end of the GPM adjustment dial, let's say, 70 GPM then if you are still running the noxzzle @ 100 PSI from the pump, does this degrade the flow/stream coming out of the nozzle such as turbulance and sputtering output of the stream? As an example. On our Engine 2-0 (rescue pumper) Crosslay #1 has a combination nozzle labeled as 70~250 GPM @ 100 PSI. If we supply the watter @ 100 PSI but have the GPM dialed down to 70 GPM, is the quality of the stream floiwng out of the nozzle over pressured or does tthe Nozzle make mechanical adjustments to the 100 PSI to provide a properly flowing stream @ 70 GPM in that scenario?

[@tjlovesrachel]

Your governor setting does that… if you set the pump at 100psi… then go from let’s say 250gpm down to 70 your engine should automatically idle down and compensate for that then pick back up once it senses that it can

[@zhuu_idchannel6510]

Hallo sir i'm Zhuu from indonesia, i have a question for you, when i see your formula i'm little bit confuse about d2. is that nozzle diameter or hose diameter or coupling diameter? please help me to understaind and thank you so much for your video, i'm really like it

[@reviewgallery570]

Why do we need to close the(discharge) isolation valve of a centrifugal pump during startup⁉️ #pumpsolutions #pump #discharge #startup #energy #oilandgas #hazard #saftey #gas #renewableenergy techproces.com/centrifugal-pump/

[@rafon.]

That's the diameter of the tip of your nozzle

[@TormodSteinsholt]

Could you add subtitles that shows litres and bars whenever you refer to gallons and psi? For us europeans.

[@Boxalarmtraining]

It may take me a little while to add that but I will work on it. Good suggestion.

[@TormodSteinsholt]

Excellent. I realize that the maths section where you work the formulas may not translate directly, but having popup texts at the parts of this video series where you conversationally throw numbers into the mix, then it would be beneficial.

[@tjlovesrachel]

@@TormodSteinsholt google is your friend

[@jzeg610]

Can’t figure out how you got the square root numbers.

[@rafon.]

In your calculator type √ and then the number.

[@spyder166]

How did you get 29 for your constant?

[@terencescott3957]

29 is the given constant. That variable will never change. It's actually 29.7 but some will round in an attempt to limit infinite numbers past the variable bc it's irrelevant with flow calcs.

[@scorchin52]

Can you please tell me where the constant 29.7 comes from?

[@Boxalarmtraining]

I'm not exactly sure how the constant is reverse engineered but basically if you flow test hose and find the outlet pressure with a gauge and the nozzle pressure with a gauge you can find the friction loss through actual testing. You could then solve the equation with the given test results to "reverse engineer" things like the coefficient for the hose or the constant.

[@NCFB4Life33]

Way over complicated