The real problem with flow meters is that there has to be a true laminar
flow through the venturi to be even close to accurate and that the flow
meter has to be calibrated before any testing can be done through it per
NFPA 25. If you have ever tried to measure flow through one of the
commercially available flow meters, you will find yourself trying to guess
or average the jittery needle movement.
They are not as accurate as a pitot gauge when calibrated and properly
used. In my jurisdiction I do not allow them to be installed or used for
flow testing.
Thank You
Rahe Loftin, P.E.
Region 7 - GSA
Office - 817-978-7299
Fax - 817-978-8644
Cell - 817-371-3102
"Thom McMahon"
<[EMAIL PROTECTED] To
hinc.com> [email protected]
Sent by: cc
sprinklerforum-bo
[EMAIL PROTECTED] Subject
er.org Re: Flow Meter
04/25/2008 10:13
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Please respond to
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resprinkler.org
Chris the only "In-Line" Flow meter we've used is on fire pumps and we use
the Victaulic Style 735 (Sizes 2.5 to 10" 500Psi max)
Thom McMahon
Firetech, Inc.
2560 Copper Ridge Dr
Steamboat Springs, CO 80488-2136
Tel: 970-879-7952
Fax: 970-879-7926
----- Original Message -----
From: "Chris Cahill" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Thursday, April 24, 2008 12:43 PM
Subject: Flow Meter
> Anyone have a lead on a flow meter that is simple to install and maintain
> and accurate? Cheap would be nice but that might be asking too much.
> Thinking something that goes on like a flow switch. To be honest I don't
> think I've actually ever seen a flow meter. This would be in the drain
> piping so no fears of fowling up the sprinkler side. I imagine where
> water
> is limited you don't waste water for silly testing if you can
recirculate.
> You folks might have some more experience than here where water is
> plentiful. Useless tidbit - MN has more shore line than CA, HI and FL
> combined.
>
>
>
> Chris Cahill, P.E.
>
> Fire Protection Engineer
>
> Sentry Fire Protection, Inc.
>
>
>
> 763-658-4483
>
> 763-658-4921 fax
>
>
>
> Email: [EMAIL PROTECTED]
>
>
>
> Mail: P.O. Box 69
>
> Waverly, MN 55390
>
>
>
> Location: 4439 Hwy 12 SW
>
> Waverly, MN 55390
>
>
>
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