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muddywater
09-16-2011, 08:09 PM
I got this flow meter offline recently. Pretty neat.

http://lawnsite.com/attachment.php?attachmentid=230096&stc=1&d=1316214234

http://lawnsite.com/attachment.php?attachmentid=230097&stc=1&d=1316214234

On this particular meter, I had 49 gpm on a 5/8 meter and 120psi dynamic pressure(6 rotors running).

ARGOS
09-16-2011, 08:20 PM
I have used those on volumetric concrete mixers. Cool.

Wet_Boots
09-16-2011, 08:56 PM
how do you push 49 gpm through a 5/8 meter? - thing must've been screaming

BrandonV
09-16-2011, 09:04 PM
sexy, we need a link and fimco needs in his store

DanaMac
09-16-2011, 09:48 PM
how do you push 49 gpm through a 5/8 meter? - thing must've been screaming

I was thinking the same thing.

muddywater
09-16-2011, 10:20 PM
I was surprised at the amount of flow. According to my charts 3/4" can flow up to 40gpm and 1" can flow up to 60gpm, so it might be feasible. 7 rotors with 2.5gpm nozzles were fogging pretty badly. I was really surprised with 120psi dynamic pressure with 7 rotors running, granted everything was going downhill with probably 20-30' elevation drop.

muddywater
09-16-2011, 10:23 PM
sexy, we need a link and fimco needs in his store

http://www.amazon.com/113255-4-Totals-1ACCUMULATIVE-1BATCH-01N31GM/dp/B00481TR0Q/ref=sr_1_1?ie=UTF8&qid=1316222585&sr=8-1

DanaMac
09-16-2011, 10:24 PM
Pressure regulator maybe?

Stuttering Stan
09-17-2011, 12:22 AM
I question the accuracy of an electronic meter. I wonder if a bucket test would produce different results.

FIMCO-MEISTER
09-17-2011, 12:49 AM
how do you push 49 gpm through a 5/8 meter? - thing must've been screaming

Ditto. Close to .8gallons per second....ain't buying it
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mitchgo
09-17-2011, 04:22 AM
Code is 5 fps.....Yeah well ef that!!! My code says it's 50 FPS!!!

Kiril
09-17-2011, 11:55 AM
I got this flow meter offline recently. Pretty neat. On this particular meter, I had 49 gpm on a 5/8 meter and 120psi dynamic pressure(6 rotors running).

That flow meter is only rated to 30 GPM and connecting it on an elbow like that is not a good idea. I have serious doubts on the validity of that data.

muddywater
09-17-2011, 07:09 PM
That flow meter is only rated to 30 GPM and connecting it on an elbow like that is not a good idea. I have serious doubts on the validity of that data.

Why is the elbow not a good idea? It seems if anything that would produce lower numbers? possibly more velocity?

Wet_Boots
09-17-2011, 07:19 PM
Why not check the accuracy against the water meter?

jvanvliet
09-17-2011, 08:10 PM
Amazing you can operate @120 psi dynamic... what do you use to glue your fittings?

Kiril
09-18-2011, 09:38 AM
Why is the elbow not a good idea? It seems if anything that would produce lower numbers? possibly more velocity?

Turbulence could interfere with the accuracy. Those types of meters are best used where you have fully developed flow (i.e. straight pipe of the same size). The typical minimum recommendation for this is 10 diameters upstream and 5 diameters downstream of any fittings or direction changes.

1idejim
09-18-2011, 12:36 PM
Turbulence could interfere with the accuracy. Those types of meters are best used where you have fully developed flow (i.e. straight pipe of the same size). The typical minimum recommendation for this is 10 diameters upstream and 5 diameters downstream of any fittings or direction changes.

this is one of the reasons that you'll see cavatation in the hair strainer of an inproperly plumbed swimming pool, limited space for equipment forces some installers to resort to rapid directional changes breaking the 10 and 5 rule.