Check the UL listing requirements, I believe the sprinkler heads are pressure
tested at 500 PSI.
Mark at Aero
-Original Message-
From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On
Behalf Of craig.pr...@ch2m.com
Sent: Wednesday, August 06, 2014 9:05 AM
To:
] On
Behalf Of mphe...@aerofire.com
Sent: Wednesday, August 06, 2014 9:08 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: RE: Excessive system pressure and opening of sprinklers
Check the UL listing requirements, I believe the sprinkler heads are pressure
tested at 500 PSI.
Mark at Aero
for conventional
sprinklers and 1000 PSI for HP.
SL
-Original Message-
From: Sprinklerforum [mailto:
sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of
mphe...@aerofire.com
Sent: Wednesday, August 06, 2014 9:08 AM
To: sprinklerforum@lists.firesprinkler.org
Subject: RE: Excessive
Subject: RE: Excessive system pressure and opening of sprinklers
Check the UL listing requirements, I believe the sprinkler heads are
pressure tested at 500 PSI.
Mark at Aero
-Original Message-
From: Sprinklerforum [mailto:
sprinklerforum-boun...@lists.firesprinkler.org
@lists.firesprinkler.org
Subject: RE: Excessive system pressure and opening of sprinklers
Check the UL listing requirements, I believe the sprinkler heads are
pressure tested at 500 PSI.
Mark at Aero
-Original Message-
From: Sprinklerforum [mailto:
sprinklerforum-boun...@lists.firesprinkler.org] On Behalf
Usually it is something else related to it Craig. What is the make,
manufacturer and year of the sprinkler? I have files on sprinkler ops and
several do have a history of operating without known causes.
Scott
(763) 425-1001x12 Office
(612) 759-5556 Cell
-Original Message-
From:
Might could be chalked up to a bad production run-- tolerances not being
checked and accounted for.
I will never cease to be amazed at the excellent record of sprinklers- how they
go off when they should but not when they shouldn't.. I wake up thinking WOW,
that's cooler than putting rovers on
That reply was meant for Forest's 3 out of 100 failure post. I never know how
to act here- I just reply to the top one- then look back and, sometimes it
doesn't make sense
On Aug 6, 2014, at 8:56 PM, Brad Casterline bcasterl...@fsc-inc.com wrote:
Might could be chalked up to a bad
-Original Message-
From: sprinklerforum-boun...@firesprinkler.org
[mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Trevor Spain
Sent: Sunday, March 22, 2009 7:31 PM
To: sprinklerforum@firesprinkler.org
Subject: Re: Excessive system pressure
Michael,
Thanks for posting an accurate
to leave a vapor space they
bulge outward before the plugs fail. Not good.
Bruce Verhei
- Original Message -
From: bill brooks bill.bro...@brooksfpe.com
To: sprinklerforum@firesprinkler.org
Sent: Friday, March 20, 2009 2:42:27 PM GMT -08:00 US/Canada Pacific
Subject: RE: Excessive
Subject: RE: Excessive system pressure
I FULLY INTEND THAT THIS WILL BE MY LAST POST REGARDING THIS SUBJECT. I
promise to make a concerted effort to make this statement true. I would also
like to state that you should probably read this entire post if you have not
completely tuned out regarding
: sprinklerforum-boun...@firesprinkler.org
[mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Rodney Hamm
Sent: Friday, March 20, 2009 9:13 AM
To: sprinklerforum@firesprinkler.org
Subject: RE: Excessive system pressure
I FULLY INTEND THAT THIS WILL BE MY LAST POST REGARDING
It is hard to remember all the ways that water is a special chemical.
Bruce Verhei
no, it is not true for all fluids. water being one of the few molecules
that behaves in this way.
scot deal
excelsior fire engineering
___
Sprinklerforum
Michael,
Thanks for posting an accurate compression constant for liquid water. I
should have known better than to grab something from the internet for a
quick post (1 part in 5x10^7). Nothing like being off by a few orders
of magnitude! I've since found a decent site on water, if you're
) 953-1677
Cell (478) 396-6988
Date: Thu, 19 Mar 2009 08:47:08 -0500
From: Dave Sornsin dsorn...@nardinifire.com
Subject: RE: Excessive system pressure
To: sprinklerforum@firesprinkler.org
Message-ID: a584babd8c23482ea2c0dd60d1182...@daves
Content-Type: text/plain; charset=us-ascii
Does the plant realize that once all your air is gone that these prv's will be
dribbling water every time the system warms up? Hopefully they have a good
mop-up crew.
Air is the cushion in the system, systems will over pressurize once they have
become water logged and there is no place for
.
President/Owner
Falcon Fire Protection
Office (478) 953-1677
Cell (478) 396-6988
Date: Thu, 19 Mar 2009 09:26:38 -0500
From: Chris Cahill chr...@sentryfiremn.com
Subject: RE: Excessive system pressure
To: sprinklerforum@firesprinkler.org
Message-ID: 4ea8e8951e2342039812650e425c4...@chris2005
experiences along the way!
Take care,
Rodney K. Hamm, P.E.
President/Owner
Falcon Fire Protection
Office (478) 953-1677
Cell (478) 396-6988
Date: Thu, 19 Mar 2009 09:26:38 -0500
From: Chris Cahill chr...@sentryfiremn.com
Subject: RE: Excessive system pressure
To: sprinklerforum
Rodney,
Last week when I posted on the incompressibility of pure water (14.7 psi
to reduce volume 1 part in 5x10^7) illustrated through a hypothetical
temperature swing from 40F to 80F, I thought my statement of BIG
PRESSURE was self explanatory on the massive pressure increase water can
Rodney,
I deal with these problems all the time. The sprinkler system MUST have
some air in it or an expansion tank otherwise the pressure will jack up to
high pressures. We see this problem every time a check valve is installed
in a domestic water system where there is a water heater
Rodney,
You said you aren't hard headed and you understand the principles behind
the system pressure increases. Here's a chance to prove both.
1. Two containers of identical volume. One container 50% water, the
other container 100% water. Each has been sitting in a 50 F room with
the lid
Of
bill.bro...@brooksfpe.com
Sent: Friday, March 20, 2009 2:42 PM
To: sprinklerforum@firesprinkler.org
Subject: RE: Excessive system pressure
Rodney,
You said you aren't hard headed and you understand the principles behind
the system pressure increases. Here's a chance to prove both.
1. Two containers
Thermal Expansion Water Hammer
One of the consequences of installing a backflow prevention assembly on any
water system is the system becoming a closed system. A closed system is a
system, which is not open to the atmosphere. A pressurized tank would be a
closed system, since there is no means
Rodney:
Just curious. I'm guessing there's gotta be a few dry systems down there in
unheated warehouses with extreme temp swings. So in these systems with 100%
air, do you find the pressure above the dry valves climbing to extreme
levels in the summer?
Dave Sornsin
General Manager - Fargo Office
I find it VERY interesting that you find it VERY interesting there has been
no findings. Hint of insecurity in your position?
Why would anyone try your experiment when it is irrelevant to the constant
volume container of a sprinkler system?
No one believes water compression is responsible for
Thanks John. I knew there was a missing component in that experiment
but couldn't (read wasn't interested enough) to put my finger on it.
Thermal expansion--makes you go Hm?
On Thu, Mar 19, 2009 at 4:20 AM, John Drucker john.druc...@verizon.net wrote:
Thermal Expansion Water Hammer
One of
There are times when folks just have to agree to disagree. I asked
nicely last week to do just that and let this thread die. We all
enjoy a good debate but not when it becomes unnecessary contentious
Just because no one else agrees with your position is not a valid
reason to say that
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