As per NFPA, pump needs to be conplied with 2 conditions. Any reasons why those conditions are there? I mean NFPA should have put these conditions for a reason. Any idea 💡
No dear. Nfpa is national fire protection organization. That is an international code. They do research and prepared a guide for us to implement. I hope u understand.😊
Hi thanks for the great video.. What happens if the required capacity falls out of the shaded part.. Does that mean, pump under consideration has failed to meet the required criteria..? I'm starting from scratch. Please recommend from where should I begin to understand the whole concept..? Thanking you once again for sharing your knowledge sir.
Thanks for your comment. Please do watch NFPA 20 training module available on my youtube channel and they are provided in sequence. Also if you want to learn about sprinkler systems watch out NFPA 13 series. Regarding your query, please note that your demand and pressure requirement shall fall with in the curve. that is enough.
Thank you for the comments. There are two more videos related to performance curves which will be posted on Monday and Tuesday@9:30 pm (ist) in which u will find various options in selecting the fire pump capacities. then u r query will be cleared.
Thanks. System demand is known by performing hydraulic calculations. you can check full procedure of performing hydraulic calculations in my NFPA 13 training series module available on youtube.
Hi Irfan, need clarification on shutoff head. how you got the value of 92psi for 80psi and 72psi for 90psi pressure rated pump. As you mentioned in the video shutoff head should not exceed 140% so if we calculate 80x140%=112psi and for 90x140%=126psi. can you please explain.
Hi. See I told as per nfpa 20, shutoff head shall not exceed 140% of rated head for any fire pump. Examples which I considered in my videos are only for understanding. But please note that this shutoff head will be decided from the manufacturer factory curve. It means exact shutoff head depends upon the manufacturers fire pump data and we cannot assume..
Whenever you get any pump data from manufacturer u need to cross verify that the provided pump shutoff head is not more than 140% head…if u are using UL FM approved pumps definitely they will comply nfpa 20 requirements. I hope it’s clear now. If u have any query let me know
Keep going
Thank you
As per NFPA, pump needs to be conplied with 2 conditions.
Any reasons why those conditions are there?
I mean NFPA should have put these conditions for a reason.
Any idea 💡
No dear. Nfpa is national fire protection organization. That is an international code. They do research and prepared a guide for us to implement. I hope u understand.😊
Hi thanks for the great video.. What happens if the required capacity falls out of the shaded part.. Does that mean, pump under consideration has failed to meet the required criteria..?
I'm starting from scratch. Please recommend from where should I begin to understand the whole concept..?
Thanking you once again for sharing your knowledge sir.
Thanks for your comment. Please do watch NFPA 20 training module available on my youtube channel and they are provided in sequence. Also if you want to learn about sprinkler systems watch out NFPA 13 series. Regarding your query, please note that your demand and pressure requirement shall fall with in the curve. that is enough.
Yes we can select pump b also thanks for explaining
Nice work
nice exercise. yes I believe the (b) pump will also work although in a much smaller range 1025 to 1125gpm and 72 to 77psi
Thank you for the comments. There are two more videos related to performance curves which will be posted on Monday and Tuesday@9:30 pm (ist) in which u will find various options in selecting the fire pump capacities. then u r query will be cleared.
Hi kindly make videos for the hydrant flow test procedure..
czcams.com/video/QcZjpE3LtmM/video.htmlfeature=shared
Please check below link. Already available on my channel
Excellent. What is the procedure to find or select the system demand .
Thanks. System demand is known by performing hydraulic calculations. you can check full procedure of performing hydraulic calculations in my NFPA 13 training series module available on youtube.
Hi Irfan, need clarification on shutoff head. how you got the value of 92psi for 80psi and 72psi for 90psi pressure rated pump. As you mentioned in the video shutoff head should not exceed 140% so if we calculate 80x140%=112psi and for 90x140%=126psi. can you please explain.
Hi. See I told as per nfpa 20, shutoff head shall not exceed 140% of rated head for any fire pump.
Examples which I considered in my videos are only for understanding.
But please note that this shutoff head will be decided from the manufacturer factory curve. It means exact shutoff head depends upon the manufacturers fire pump data and we cannot assume..
Whenever you get any pump data from manufacturer u need to cross verify that the provided pump shutoff head is not more than 140% head…if u are using UL FM approved pumps definitely they will comply nfpa 20 requirements. I hope it’s clear now. If u have any query let me know
thank you
You're welcome! I'm glad you enjoyed the video.
What is called overload?
How did u considered 1500gpm for the overload
Many thanks in advance
As per nfpa 20 fire pump shall deliver 150% of rated flow at minimum 65% pump rated head.
Also overload means pump runs at 150% capacity.